This patch adds new classes and tests to implement a tracker for the
life time of temporary registers for the register renaming stage of
glsl_to_tgsi. The tracker aims at estimating the shortest possible
life time for each register. The code base requires c++11, the flag is
propagated from the LLVM_CXXFLAGS.
---
configure.ac | 1 +
src/mesa/Makefile.am | 4 +-
src/mesa/Makefile.sources | 2 +
src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp | 202 +++++
src/mesa/state_tracker/st_glsl_to_tgsi_private.h | 164 ++++
.../state_tracker/st_glsl_to_tgsi_temprename.cpp | 674 +++++++++++++++
.../state_tracker/st_glsl_to_tgsi_temprename.h | 30 +
src/mesa/state_tracker/tests/Makefile.am | 40 +
.../tests/test_glsl_to_tgsi_lifetime.cpp | 959 +++++++++++++++++++++
9 files changed, 2074 insertions(+), 2 deletions(-)
create mode 100644 src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp
create mode 100644 src/mesa/state_tracker/st_glsl_to_tgsi_private.h
create mode 100644 src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
create mode 100644 src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
create mode 100644 src/mesa/state_tracker/tests/Makefile.am
create mode 100644 src/mesa/state_tracker/tests/test_glsl_to_tgsi_lifetime.cpp
diff --git a/configure.ac b/configure.ac
index 6c67d27084..855d06779c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2827,6 +2827,7 @@ AC_CONFIG_FILES([Makefile
src/mesa/drivers/osmesa/osmesa.pc
src/mesa/drivers/x11/Makefile
src/mesa/main/tests/Makefile
+ src/mesa/state_tracker/tests/Makefile
src/util/Makefile
src/util/tests/hash_table/Makefile
src/vulkan/Makefile])
diff --git a/src/mesa/Makefile.am b/src/mesa/Makefile.am
index 53f311d2a9..72ffd61212 100644
--- a/src/mesa/Makefile.am
+++ b/src/mesa/Makefile.am
@@ -19,7 +19,7 @@
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
-SUBDIRS = . main/tests
+SUBDIRS = . main/tests state_tracker/tests
if HAVE_XLIB_GLX
SUBDIRS += drivers/x11
@@ -101,7 +101,7 @@ AM_CFLAGS = \
$(VISIBILITY_CFLAGS) \
$(MSVC2013_COMPAT_CFLAGS)
AM_CXXFLAGS = \
- $(LLVM_CFLAGS) \
+ $(LLVM_CXXFLAGS) \
$(VISIBILITY_CXXFLAGS) \
$(MSVC2013_COMPAT_CXXFLAGS)
diff --git a/src/mesa/Makefile.sources b/src/mesa/Makefile.sources
index 21f9167bda..a68e9d2afe 100644
--- a/src/mesa/Makefile.sources
+++ b/src/mesa/Makefile.sources
@@ -509,6 +509,8 @@ STATETRACKER_FILES = \
state_tracker/st_glsl_to_tgsi.h \
state_tracker/st_glsl_to_tgsi_private.cpp \
state_tracker/st_glsl_to_tgsi_private.h \
+ state_tracker/st_glsl_to_tgsi_temprename.cpp \
+ state_tracker/st_glsl_to_tgsi_temprename.h \
state_tracker/st_glsl_types.cpp \
state_tracker/st_glsl_types.h \
state_tracker/st_manager.c \
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp
new file mode 100644
index 0000000000..d3115a4bfc
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp
@@ -0,0 +1,202 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2011 Bryan Cain
+ * Copyright © 2017 Gert Wollny
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "st_glsl_to_tgsi_private.h"
+#include <tgsi/tgsi_info.h>
+#include <mesa/program/prog_instruction.h>
+
+using std::vector;
+
+extern int swizzle_for_size(int size);
+
+static int swizzle_for_type(const glsl_type *type, int component = 0)
+{
+ unsigned num_elements = 4;
+
+ if (type) {
+ type = type->without_array();
+ if (type->is_scalar() || type->is_vector() || type->is_matrix())
+ num_elements = type->vector_elements;
+ }
+
+ int swizzle = swizzle_for_size(num_elements);
+ assert(num_elements + component <= 4);
+
+ swizzle += component * MAKE_SWIZZLE4(1, 1, 1, 1);
+ return swizzle;
+}
+
+
+
+st_src_reg::st_src_reg(gl_register_file file, int index, const glsl_type *type,
+ int component, unsigned array_id)
+{
+ assert(file != PROGRAM_ARRAY || array_id != 0);
+ this->file = file;
+ this->index = index;
+ this->swizzle = swizzle_for_type(type, component);
+ this->negate = 0;
+ this->abs = 0;
+ this->index2D = 0;
+ this->type = type ? type->base_type : GLSL_TYPE_ERROR;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->double_reg2 = false;
+ this->array_id = array_id;
+ this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg(gl_register_file file, int index, enum glsl_base_type type)
+{
+ assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+ this->type = type;
+ this->file = file;
+ this->index = index;
+ this->index2D = 0;
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->abs = 0;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->double_reg2 = false;
+ this->array_id = 0;
+ this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg(gl_register_file file, int index, enum glsl_base_type type, int index2D)
+{
+ assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+ this->type = type;
+ this->file = file;
+ this->index = index;
+ this->index2D = index2D;
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->abs = 0;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->double_reg2 = false;
+ this->array_id = 0;
+ this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg()
+{
+ this->type = GLSL_TYPE_ERROR;
+ this->file = PROGRAM_UNDEFINED;
+ this->index = 0;
+ this->index2D = 0;
+ this->swizzle = 0;
+ this->negate = 0;
+ this->abs = 0;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->double_reg2 = false;
+ this->array_id = 0;
+ this->is_double_vertex_input = false;
+}
+
+st_src_reg st_src_reg::get_abs()
+{
+ st_src_reg reg = *this;
+ reg.negate = 0;
+ reg.abs = 1;
+ return reg;
+}
+
+st_src_reg::st_src_reg(st_dst_reg reg)
+{
+ this->type = reg.type;
+ this->file = reg.file;
+ this->index = reg.index;
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->abs = 0;
+ this->reladdr = reg.reladdr;
+ this->index2D = reg.index2D;
+ this->reladdr2 = reg.reladdr2;
+ this->has_index2 = reg.has_index2;
+ this->double_reg2 = false;
+ this->array_id = reg.array_id;
+ this->is_double_vertex_input = false;
+}
+
+st_dst_reg::st_dst_reg(st_src_reg reg)
+{
+ this->type = reg.type;
+ this->file = reg.file;
+ this->index = reg.index;
+ this->writemask = WRITEMASK_XYZW;
+ this->reladdr = reg.reladdr;
+ this->index2D = reg.index2D;
+ this->reladdr2 = reg.reladdr2;
+ this->has_index2 = reg.has_index2;
+ this->array_id = reg.array_id;
+}
+
+st_dst_reg::st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type, int index)
+{
+ assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+ this->file = file;
+ this->index = index;
+ this->index2D = 0;
+ this->writemask = writemask;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->type = type;
+ this->array_id = 0;
+}
+
+st_dst_reg::st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type)
+{
+ assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+ this->file = file;
+ this->index = 0;
+ this->index2D = 0;
+ this->writemask = writemask;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->type = type;
+ this->array_id = 0;
+}
+
+st_dst_reg::st_dst_reg()
+{
+ this->type = GLSL_TYPE_ERROR;
+ this->file = PROGRAM_UNDEFINED;
+ this->index = 0;
+ this->index2D = 0;
+ this->writemask = 0;
+ this->reladdr = NULL;
+ this->reladdr2 = NULL;
+ this->has_index2 = false;
+ this->array_id = 0;
+}
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_private.h b/src/mesa/state_tracker/st_glsl_to_tgsi_private.h
new file mode 100644
index 0000000000..d729bc008d
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_private.h
@@ -0,0 +1,164 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2011 Bryan Cain
+ * Copyright © 2017 Gert Wollny
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <mesa/main/mtypes.h>
+#include <compiler/glsl_types.h>
+#include <compiler/glsl/ir.h>
+#include <tgsi/tgsi_info.h>
+#include <stack>
+#include <vector>
+
+class st_dst_reg;
+
+/**
+ * This struct is a corresponding struct to TGSI ureg_src.
+ */
+class st_src_reg {
+public:
+ st_src_reg(gl_register_file file, int index, const glsl_type *type,
+ int component = 0, unsigned array_id = 0);
+
+ st_src_reg(gl_register_file file, int index, enum glsl_base_type type);
+
+ st_src_reg(gl_register_file file, int index, enum glsl_base_type type, int index2D);
+
+ st_src_reg();
+
+ explicit st_src_reg(st_dst_reg reg);
+
+ st_src_reg get_abs();
+
+ int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
+ int16_t index2D;
+
+ uint16_t swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
+ int negate:4; /**< NEGATE_XYZW mask from mesa */
+ unsigned abs:1;
+ enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+ unsigned has_index2:1;
+ gl_register_file file:5; /**< PROGRAM_* from Mesa */
+ /*
+ * Is this the second half of a double register pair?
+ * currently used for input mapping only.
+ */
+ unsigned double_reg2:1;
+ unsigned is_double_vertex_input:1;
+ unsigned array_id:10;
+ /** Register index should be offset by the integer in this reg. */
+ st_src_reg *reladdr;
+ st_src_reg *reladdr2;
+
+};
+
+class st_dst_reg {
+public:
+ st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type, int index);
+
+ st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type);
+
+ st_dst_reg();
+
+ explicit st_dst_reg(st_src_reg reg);
+
+ int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
+ int16_t index2D;
+ gl_register_file file:5; /**< PROGRAM_* from Mesa */
+ unsigned writemask:4; /**< Bitfield of WRITEMASK_[XYZW] */
+ enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+ unsigned has_index2:1;
+ unsigned array_id:10;
+
+ /** Register index should be offset by the integer in this reg. */
+ st_src_reg *reladdr;
+ st_src_reg *reladdr2;
+};
+
+class glsl_to_tgsi_instruction : public exec_node {
+public:
+ DECLARE_RALLOC_CXX_OPERATORS(glsl_to_tgsi_instruction)
+
+ st_dst_reg dst[2];
+ st_src_reg src[4];
+ st_src_reg resource; /**< sampler or buffer register */
+ st_src_reg *tex_offsets;
+
+ /** Pointer to the ir source this tree came from for debugging */
+ ir_instruction *ir;
+
+ unsigned op:8; /**< TGSI opcode */
+ unsigned saturate:1;
+ unsigned is_64bit_expanded:1;
+ unsigned sampler_base:5;
+ unsigned sampler_array_size:6; /**< 1-based size of sampler array, 1 if not array */
+ unsigned tex_target:4; /**< One of TEXTURE_*_INDEX */
+ glsl_base_type tex_type:5;
+ unsigned tex_shadow:1;
+ unsigned image_format:9;
+ unsigned tex_offset_num_offset:3;
+ unsigned dead_mask:4; /**< Used in dead code elimination */
+ unsigned buffer_access:3; /**< buffer access type */
+
+ const struct tgsi_opcode_info *info;
+};
+
+struct rename_reg_pair {
+ bool valid;
+ int new_reg;
+};
+
+inline bool
+is_resource_instruction(unsigned opcode)
+{
+ switch (opcode) {
+ case TGSI_OPCODE_RESQ:
+ case TGSI_OPCODE_LOAD:
+ case TGSI_OPCODE_ATOMUADD:
+ case TGSI_OPCODE_ATOMXCHG:
+ case TGSI_OPCODE_ATOMCAS:
+ case TGSI_OPCODE_ATOMAND:
+ case TGSI_OPCODE_ATOMOR:
+ case TGSI_OPCODE_ATOMXOR:
+ case TGSI_OPCODE_ATOMUMIN:
+ case TGSI_OPCODE_ATOMUMAX:
+ case TGSI_OPCODE_ATOMIMIN:
+ case TGSI_OPCODE_ATOMIMAX:
+ return true;
+ default:
+ return false;
+ }
+}
+
+inline unsigned
+num_inst_dst_regs(const glsl_to_tgsi_instruction *op)
+{
+ return op->info->num_dst;
+}
+
+inline unsigned
+num_inst_src_regs(const glsl_to_tgsi_instruction *op)
+{
+ return op->info->is_tex || is_resource_instruction(op->op) ?
+ op->info->num_src - 1 : op->info->num_src;
+}
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
new file mode 100644
index 0000000000..a2e8e3778c
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.cpp
@@ -0,0 +1,674 @@
+/*
+ * Copyright © 2017 Gert Wollny
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "st_glsl_to_tgsi_temprename.h"
+#include <tgsi/tgsi_info.h>
+#include <mesa/program/prog_instruction.h>
+#include <stack>
+#include <algorithm>
+#include <limits>
+
+using std::vector;
+using std::stack;
+using std::pair;
+using std::make_pair;
+using std::numeric_limits;
+
+
+typedef int scope_idx;
+
+enum e_scope_type {
+ sct_outer,
+ sct_loop,
+ sct_if,
+ sct_else,
+ sct_switch,
+ sct_switch_case,
+ sct_switch_default,
+ sct_unknown
+};
+
+enum e_acc_type {
+ acc_read,
+ acc_write
+};
+
+class prog_scope {
+
+public:
+ prog_scope(e_scope_type type, int my_idx, int id, int lvl, int s_begin,
+ vector<prog_scope>& scopes);
+ prog_scope(scope_idx p, e_scope_type type, int my_idx, int id,
+ int lvl, int s_begin, vector<prog_scope>& scopes);
+
+ e_scope_type type() const { return scope_type; }
+ scope_idx parent() const { return parent_scope; }
+ int level() const {return nested_level; }
+ int id() const { return scope_id; }
+ int end() const {return scope_end; }
+ int begin() const {return scope_begin; }
+ int loop_continue_line() const {return loop_continue;}
+
+ scope_idx in_ifelse() const;
+ scope_idx in_switchcase() const;
+
+ bool in_loop() const;
+ scope_idx get_parent_loop() const;
+ bool is_conditional() const;
+ bool contains(scope_idx idx) const;
+ void set_end(int end);
+ void set_previous(scope_idx prev);
+ void set_continue(scope_idx scope, int i);
+ bool enclosed_by_loop_prior_to_switch();
+private:
+
+ e_scope_type scope_type;
+ int scope_id;
+ int nested_level;
+ int scope_begin;
+ int scope_end;
+ int loop_continue;
+
+ scope_idx my_idx;
+ scope_idx scope_of_loop_to_continue;
+ scope_idx previous_switchcase;
+ scope_idx parent_scope;
+
+ vector<prog_scope>& scopes;
+};
+
+class temp_access {
+
+public:
+ temp_access(vector<prog_scope>& scopes);
+ void append(int index, e_acc_type rw, scope_idx pstate);
+ pair<int, int> get_required_lifetime();
+
+private:
+
+ struct temp_access_record {
+ int index;
+ e_acc_type acc;
+ scope_idx prog_scope;
+ };
+
+ std::vector<prog_scope>& scopes;
+
+ bool keep_for_full_loop;
+
+ scope_idx last_read_scope;
+ scope_idx undefined_read_scope;
+ scope_idx first_write_scope;
+
+ int first_write;
+ int last_read;
+ int last_write;
+ int undefined_read;
+};
+
+
+class tgsi_temp_lifetime {
+
+public:
+
+ tgsi_temp_lifetime();
+
+ vector<std::pair<int, int> > get_lifetimes(exec_list *instructions,
+ int ntemps) const;
+private:
+
+ scope_idx make_scope(e_scope_type type, int id, int lvl, int s_begin) const;
+ scope_idx make_scope(scope_idx p, e_scope_type type, int id,
+ int lvl, int s_begin) const;
+
+ void evaluate();
+
+ mutable vector<prog_scope> scopes;
+
+};
+
+tgsi_temp_lifetime::tgsi_temp_lifetime()
+{
+ scopes.reserve(20);
+}
+
+scope_idx
+tgsi_temp_lifetime::make_scope(e_scope_type type, int id, int lvl,
+ int s_begin)const
+{
+ int idx = scopes.size();
+ scopes.push_back(prog_scope(type, idx, id, lvl, s_begin, scopes));
+ return idx;
+}
+
+scope_idx
+tgsi_temp_lifetime::make_scope(scope_idx p, e_scope_type type, int id,
+ int lvl, int s_begin) const
+{
+ int idx = scopes.size();
+ scopes.push_back(prog_scope(p, type, idx, id, lvl, s_begin, scopes));
+ return idx;
+}
+
+vector<pair<int, int> >
+tgsi_temp_lifetime::get_lifetimes(exec_list *instructions, int ntemps) const
+{
+ int line = 0;
+ int loop_id = 0;
+ int if_id = 0;
+ int switch_id = 0;
+ int nesting_lvl = 0;
+ bool is_at_end = false;
+ stack<scope_idx> scope_stack;
+
+ std::vector<std::pair<int, int> > lifetimes(ntemps);
+ vector<temp_access> acc(ntemps, temp_access(scopes));
+
+ scope_idx current = make_scope(sct_outer, 0, nesting_lvl++, line);
+
+ foreach_in_list(glsl_to_tgsi_instruction, inst, instructions) {
+ if (is_at_end) {
+ // shader has instructions past end marker; we ignore this
+ break;
+ }
+
+ switch (inst->op) {
+ case TGSI_OPCODE_BGNLOOP: {
+ scope_idx scope = make_scope(current, sct_loop, loop_id,
+ nesting_lvl, line);
+ ++loop_id;
+ ++nesting_lvl;
+ scope_stack.push(current);
+ current = scope;
+ break;
+ }
+ case TGSI_OPCODE_ENDLOOP: {
+ --nesting_lvl;
+ scopes[current].set_end(line);
+ current = scope_stack.top();
+ scope_stack.pop();
+ break;
+ }
+ case TGSI_OPCODE_IF:
+ case TGSI_OPCODE_UIF:{
+ if (inst->src[0].file == PROGRAM_TEMPORARY) {
+ acc[inst->src[0].index].append(line, acc_read, current);
+ }
+ scope_idx scope = make_scope(current, sct_if, if_id, nesting_lvl, line);
+ ++if_id;
+ ++nesting_lvl;
+ scope_stack.push(current);
+ current = scope;
+ break;
+ }
+ case TGSI_OPCODE_ELSE: {
+ scopes[current].set_end(line-1);
+ current = make_scope(scopes[current].parent(), sct_else,
+ scopes[current].id(), scopes[current].level(), line);
+ break;
+ }
+ case TGSI_OPCODE_END:{
+ scopes[current].set_end(line);
+ is_at_end = true;
+ break;
+ }
+ case TGSI_OPCODE_ENDIF:{
+ --nesting_lvl;
+ scopes[current].set_end(line-1);
+ current = scope_stack.top();
+ scope_stack.pop();
+ break;
+ }
+ case TGSI_OPCODE_SWITCH: {
+ scope_idx scope = make_scope(current, sct_switch, switch_id,
+ nesting_lvl, line);
+ ++nesting_lvl;
+ ++switch_id;
+ scope_stack.push(current);
+ current = scope;
+ break;
+ }
+ case TGSI_OPCODE_ENDSWITCH: {
+ --nesting_lvl;
+ scopes[current].set_end(line-1);
+
+ // remove the case level
+ if (scopes[current].type() != sct_switch ) {
+ current = scope_stack.top();
+ scope_stack.pop();
+ }
+ current = scope_stack.top();
+ scope_stack.pop();
+ break;
+ }
+
+ case TGSI_OPCODE_CASE:
+ if (inst->src[0].file == PROGRAM_TEMPORARY) {
+ acc[inst->src[0].index].append(line, acc_read, current);
+ } // fall through
+ case TGSI_OPCODE_DEFAULT: {
+ auto scope_type = (inst->op == TGSI_OPCODE_CASE) ?
+ sct_switch_case : sct_switch_default;
+ if ( scopes[current].type() == sct_switch ) {
+ scope_stack.push(current);
+ current = make_scope(current, scope_type, scopes[current].id(),
+ nesting_lvl, line);
+ }else{
+ auto p = scopes[current].parent();
+ auto scope = make_scope(p, scope_type, scopes[p].id(),
+ scopes[p].level(), line);
+ if (scopes[current].end() == -1)
+ scopes[scope].set_previous(current);
+ current = scope;
+ }
+ break;
+ }
+ case TGSI_OPCODE_BRK: {
+ if ( (scopes[current].type() == sct_switch_case) ||
+ (scopes[current].type() == sct_switch_default)) {
+ scopes[current].set_end(line-1);
+ }
+ /* Make sure that the nearest enclosing scope is a loop
+ * and not a switch case.
+ * Apart from that this is like a continue, just
+ * a bit more final */
+ else if (scopes[current].enclosed_by_loop_prior_to_switch()) {
+ scopes[current].set_continue(current, line);
+ }
+ break;
+ }
+ case TGSI_OPCODE_CONT: {
+ scopes[current].set_continue(current, line);
+ break;
+ }
+
+ default: {
+
+ for (unsigned j = 0; j < num_inst_dst_regs(inst); j++) {
+ if (inst->dst[j].file == PROGRAM_TEMPORARY) {
+ acc[inst->dst[j].index].append(line, acc_write, current);
+ }
+ }
+
+ for (unsigned j = 0; j < num_inst_src_regs(inst); j++) {
+ if (inst->src[j].file == PROGRAM_TEMPORARY) {
+ acc[inst->src[j].index].append(line, acc_read, current);
+ }
+ }
+
+ for (unsigned j = 0; j < inst->tex_offset_num_offset; j++) {
+ if (inst->tex_offsets[j].file == PROGRAM_TEMPORARY) {
+ acc[inst->tex_offsets[j].index].append(line, acc_read, current);
+ }
+ }
+
+ } // end default
+ } // end switch (op)
+
+ ++line;
+ }
+
+ // make sure last scope is closed, even though no
+ // TGSI_OPCODE_END was given
+ if (scopes[current].end() < 0) {
+ scopes[current].set_end(line-1);
+ }
+
+ for(unsigned i = 1; i < lifetimes.size(); ++i) {
+ lifetimes[i] = acc[i].get_required_lifetime();
+ }
+ scopes.clear();
+ return lifetimes;
+}
+
+
+prog_scope::prog_scope(e_scope_type type, int idx, int id,
+ int lvl, int s_begin,
+ std::vector<prog_scope>& s):
+ prog_scope(-1, type, idx, id, lvl, s_begin, s)
+{
+}
+
+prog_scope::prog_scope(scope_idx p, e_scope_type type,
+ int idx, int id, int lvl, int s_begin,
+ std::vector<prog_scope>& s):
+ scope_type(type),
+ scope_id(id),
+ nested_level(lvl),
+ scope_begin(s_begin),
+ scope_end(-1),
+ loop_continue(numeric_limits<int>::max()),
+ my_idx(idx),
+ scope_of_loop_to_continue(0),
+ previous_switchcase(0),
+ parent_scope(p),
+ scopes(s)
+{
+}
+
+bool prog_scope::in_loop() const
+{
+ if (scope_type == sct_loop)
+ return true;
+ if (parent_scope >= 0)
+ return scopes[parent_scope].in_loop();
+ return false;
+}
+
+scope_idx
+prog_scope::get_parent_loop() const
+{
+ if (scope_type == sct_loop)
+ return my_idx;
+ if (parent_scope >= 0)
+ return scopes[parent_scope].get_parent_loop();
+ else
+ return -1;
+}
+
+bool prog_scope::contains(scope_idx other) const
+{
+ return (begin() <= scopes[other].begin()) && (end() >= scopes[other].end());
+}
+
+bool prog_scope::is_conditional() const
+{
+ return scope_type == sct_if || scope_type == sct_else ||
+ scope_type == sct_switch_case || scope_type == sct_switch_default;
+}
+
+bool prog_scope::enclosed_by_loop_prior_to_switch()
+{
+ if (scope_type == sct_loop)
+ return true;
+ if (scope_type == sct_switch_case ||
+ scope_type == sct_switch_default ||
+ scope_type == sct_switch)
+ return false;
+ if (parent_scope >= 0)
+ return scopes[parent_scope].enclosed_by_loop_prior_to_switch();
+ else
+ return false;
+}
+
+scope_idx prog_scope::in_ifelse() const
+{
+ if ((scope_type == sct_if) ||
+ (scope_type == sct_else))
+ return my_idx;
+ else if (parent_scope >= 0)
+ return scopes[parent_scope].in_ifelse();
+ else
+ return -1;
+}
+
+scope_idx prog_scope::in_switchcase() const
+{
+ if ((scope_type == sct_switch_case) ||
+ (scope_type == sct_switch_default))
+ return my_idx;
+ else if (parent_scope >= 0)
+ return scopes[parent_scope].in_switchcase();
+ else
+ return -1;
+}
+
+void prog_scope::set_previous(scope_idx prev)
+{
+ previous_switchcase = prev;
+}
+
+void prog_scope::set_end(int end)
+{
+ if (scope_end == -1) {
+ scope_end = end;
+ if (previous_switchcase)
+ scopes[parent_scope].set_end(end);
+ }
+}
+
+void prog_scope::set_continue(scope_idx scope, int line)
+{
+ if (scope_type == sct_loop) {
+ scope_of_loop_to_continue = scope;
+ loop_continue = line;
+ } else if (parent_scope >= 0)
+ scopes[parent_scope].set_continue(scope, line);
+}
+
+temp_access::temp_access(std::vector<prog_scope>& s):
+ scopes(s),
+ keep_for_full_loop(false),
+ last_read_scope(-1),
+ undefined_read_scope(-1),
+ first_write_scope(-1),
+ first_write(-1),
+ last_read(-1),
+ last_write(-1),
+ undefined_read(numeric_limits<int>::max())
+{
+}
+
+void temp_access::append(int line, e_acc_type acc, scope_idx idx)
+{
+ last_write = line;
+ if (acc == acc_read) {
+ last_read = line;
+ last_read_scope = idx;
+ if (undefined_read > line) {
+ undefined_read = line;
+ undefined_read_scope = idx;
+ }
+ } else {
+ if (first_write == -1) {
+ first_write = line;
+ first_write_scope = idx;
+
+ // we write in an if-branch
+ auto fw_ifthen_scope = scopes[idx].in_ifelse();
+ if ((fw_ifthen_scope >= 0) && scopes[fw_ifthen_scope].in_loop()) {
+ // value not always written, in loops we must keep it
+ keep_for_full_loop = true;
+ } else {
+ // same thing for switch-case
+ auto fw_switch_scope = scopes[idx].in_switchcase();
+ if (fw_switch_scope >= 0 && scopes[fw_switch_scope].in_loop()) {
+ keep_for_full_loop = true;
+ }
+ }
+ }
+ }
+}
+
+pair<int, int> temp_access::get_required_lifetime()
+{
+ /* this temp is only read, this is undefined
+ behaviour, so we can use the register otherwise */
+ if (first_write_scope < 0) {
+ return make_pair(-1, -1);
+ }
+
+ /* Only written to, just make sure that renaming
+ * doesn't reuse this register too early (corner
+ * case is the one opcode with two destinations) */
+ if (last_read_scope < 0) {
+ return make_pair(first_write, first_write + 1);
+ }
+
+ // evaluate the shared scope
+ int target_level = -1;
+
+ while (target_level < 0) {
+ if (scopes[last_read_scope].contains(first_write_scope)) {
+ target_level = scopes[last_read_scope].level();
+ } else if (scopes[first_write_scope].contains(last_read_scope)) {
+ target_level = scopes[first_write_scope].level();
+ } else {
+ // scopes (partially) disjunct, move up
+ if (scopes[last_read_scope].type() == sct_loop) {
+ last_read = scopes[last_read_scope].end();
+ }
+ last_read_scope = scopes[last_read_scope].parent();
+ }
+ }
+
+ // propagate the read scope to the target_level
+ while (scopes[last_read_scope].level() > target_level) {
+
+ /* if the read is in a loop we need to extend the
+ * variables life time to the end of that loop */
+ if (scopes[last_read_scope].type() == sct_loop) {
+ last_read = scopes[last_read_scope].end();
+ }
+ last_read_scope = scopes[last_read_scope].parent();
+ }
+
+ /* propagate lifetime also if there was a continue/break
+ * in a loop and the write was after it (so it constitutes
+ * a conditional write */
+ if (scopes[first_write_scope].loop_continue_line() < first_write) {
+ keep_for_full_loop = true;
+ }
+
+ /* propagate lifetimes before moving to upper scopes */
+ if ((scopes[first_write_scope].type() == sct_loop) &&
+ (keep_for_full_loop || (undefined_read < first_write))) {
+ first_write = scopes[first_write_scope].begin();
+ int lr = scopes[first_write_scope].end();
+ if (last_read < lr)
+ last_read = lr;
+ }
+
+ // propagate the first_write scope to the target_level
+ while (target_level < scopes[first_write_scope].level()) {
+
+ first_write_scope = scopes[first_write_scope].parent();
+
+ if (scopes[first_write_scope].loop_continue_line() < first_write) {
+ keep_for_full_loop = true;
+ }
+
+ // if the value is conditionally written in a loop
+ // then propagate its lifetime to the full loop
+ if (scopes[first_write_scope].type() == sct_loop) {
+ if (keep_for_full_loop || (undefined_read < first_write)) {
+ first_write = scopes[first_write_scope].begin();
+ int lr = scopes[first_write_scope].end();
+ if (last_read < lr)
+ last_read = lr;
+ }
+ }
+
+ // if we currently don't propagate the lifetime but
+ // the enclosing scope is a conditional within a loop
+ // up to the last-read level we need to propagate,
+ // todo: to tighten the life time check whether the value
+ // is written in all consitional code path below the loop
+ if (!keep_for_full_loop &&
+ scopes[first_write_scope].is_conditional() &&
+ scopes[first_write_scope].in_loop()) {
+ keep_for_full_loop = true;
+ }
+ }
+
+
+ /* We do not correct the last_write for scope, but
+ * if it is past the last_read we have to keep the
+ * temporary alive past this instructions */
+ if (last_write > last_read) {
+ last_read = last_write + 1;
+ }
+
+ return make_pair(first_write, last_read);
+}
+
+vector<pair<int, int>>
+estimate_temporary_lifetimes(exec_list *instructions, int ntemps)
+{
+ return tgsi_temp_lifetime().get_lifetimes(instructions, ntemps);
+}
+
+void evaluate_remapping(const std::vector<std::pair<int, int>>& lifetimes,
+ struct rename_reg_pair *result)
+{
+ struct access_record {
+ int begin;
+ int end;
+ unsigned reg;
+ bool erase;
+ };
+
+ auto compare_begin = [](const access_record& a, const access_record& b) {
+ return a.begin < b.begin;
+ };
+ auto compare_end_begin = [](const access_record& a, const access_record& b) {
+ return a.end <= b.begin;
+ };
+
+ vector<access_record> m(lifetimes.size() - 1);
+
+ for (unsigned i = 1; i < lifetimes.size(); ++i) {
+ m[i-1] = {lifetimes[i].first, lifetimes[i].second, i, false};
+ }
+
+ std::sort(m.begin(), m.end(), compare_begin);
+
+ auto trgt = m.begin();
+ auto mend = m.end();
+ auto first_erase = mend;
+ auto search_start = trgt + 1;
+
+ while (trgt != mend) {
+
+ auto src = std::upper_bound(search_start, mend, *trgt, compare_end_begin);
+ if (src != mend) {
+ result[src->reg].new_reg = trgt->reg;
+ result[src->reg].valid = true;
+ trgt->end = src->end;
+
+ /* Since we only search forward, don't erase the renamed
+ * register just now, just mark it for removal. The alternative
+ * to call m.erase(src) here would be quite expensive. */
+ src->erase = true;
+ if (first_erase == mend)
+ first_erase = src;
+ search_start = src + 1;
+ } else {
+ /* Moving to the next target register it is time to
+ * erase the already merged registers */
+ if (first_erase != mend) {
+ auto out = first_erase;
+ auto in_start = first_erase + 1;
+ while (in_start != mend) {
+ if (!in_start->erase)
+ *out++ = *in_start;
+ ++in_start;
+ }
+ mend = out;
+ first_erase = mend;
+ }
+ ++trgt;
+ search_start = trgt + 1;
+ }
+ }
+}
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
new file mode 100644
index 0000000000..04d5321682
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_temprename.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2017 Gert Wollny
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "st_glsl_to_tgsi_private.h"
+
+std::vector<std::pair<int, int>>
+estimate_temporary_lifetimes(exec_list *instructions, int ntemps);
+
+void evaluate_remapping(const std::vector<std::pair<int, int>>& lt,
+ struct rename_reg_pair *result);
diff --git a/src/mesa/state_tracker/tests/Makefile.am b/src/mesa/state_tracker/tests/Makefile.am
new file mode 100644
index 0000000000..ac6def682a
--- /dev/null
+++ b/src/mesa/state_tracker/tests/Makefile.am
@@ -0,0 +1,40 @@
+AM_CFLAGS = \
+ $(PTHREAD_CFLAGS)
+
+AM_CXXFLAGS = \
+ $(LLVM_CXXFLAGS)
+
+AM_CPPFLAGS = \
+ -I$(top_srcdir)/src/gtest/include \
+ -I$(top_srcdir)/src \
+ -I$(top_srcdir)/src/mapi \
+ -I$(top_builddir)/src/mesa \
+ -I$(top_srcdir)/src/mesa \
+ -I$(top_srcdir)/include \
+ -I$(top_srcdir)/src/gallium/include \
+ -I$(top_srcdir)/src/gallium/auxiliary \
+ $(DEFINES) $(INCLUDE_DIRS)
+
+TESTS = st-renumerate-test
+check_PROGRAMS = st-renumerate-test
+
+st_renumerate_test_SOURCES = \
+ test_glsl_to_tgsi_lifetime.cpp
+
+st_renumerate_test_LDFLAGS = \
+ $(LLVM_LDFLAGS)
+
+st_renumerate_test_LDADD = \
+ $(top_builddir)/src/mesa/libmesagallium.la \
+ $(top_builddir)/src/mapi/shared-glapi/libglapi.la \
+ $(top_builddir)/src/gallium/auxiliary/libgallium.la \
+ $(top_builddir)/src/util/libmesautil.la \
+ $(top_builddir)/src/gallium/drivers/trace/libtrace.la \
+ $(top_builddir)/src/gallium/winsys/sw/null/libws_null.la \
+ $(top_builddir)/src/gallium/drivers/softpipe/libsoftpipe.la \
+ $(top_builddir)/src/gtest/libgtest.la \
+ $(GALLIUM_COMMON_LIB_DEPS) \
+ $(LLVM_LIBS) \
+ $(PTHREAD_LIBS) \
+ $(DLOPEN_LIBS) \
+ -ldl
diff --git a/src/mesa/state_tracker/tests/test_glsl_to_tgsi_lifetime.cpp b/src/mesa/state_tracker/tests/test_glsl_to_tgsi_lifetime.cpp
new file mode 100644
index 0000000000..a2c59fb28f
--- /dev/null
+++ b/src/mesa/state_tracker/tests/test_glsl_to_tgsi_lifetime.cpp
@@ -0,0 +1,959 @@
+/*
+ * Copyright © 2017 Gert Wollny
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <state_tracker/st_glsl_to_tgsi_temprename.h>
+#include <tgsi/tgsi_ureg.h>
+#include <tgsi/tgsi_info.h>
+#include <compiler/glsl/list.h>
+#include <gtest/gtest.h>
+
+using std::vector;
+using std::pair;
+
+
+/* A line to describe a TGSI instruction for building mock shaders */
+struct MockCodeline {
+ MockCodeline(unsigned _op): op(_op) {}
+ MockCodeline(unsigned _op, const vector<int>& _dst,
+ const vector<int>& _src, const vector<int>&_to):
+ op(_op), dst(_dst), src(_src), tex_offsets(_to){}
+ unsigned op;
+ vector<int> dst;
+ vector<int> src;
+ vector<int> tex_offsets;
+};
+
+/* A few constants to use in the mock shaders */
+const int in0 = 0;
+const int in1 = -1;
+const int in2 = -2;
+
+const int out0 = 0;
+const int out1 = -1;
+
+/* A class to create a shader program to check the register allocation
+ * and renaming. The created exec_list is not completely set up and can
+ * only be used for the register tife-time analyis. */
+class MockShader {
+public:
+ MockShader(const vector<MockCodeline>& source);
+ ~MockShader();
+
+ void free();
+
+ exec_list* get_program();
+ int get_num_temps();
+private:
+ st_src_reg create_src_register(int src_idx);
+ st_dst_reg create_dst_register(int dst_idx);
+ exec_list* program;
+ int num_temps;
+ void *mem_ctx;
+};
+
+/* type for register lifetime expectation */
+using expectation = vector<vector<int>>;
+
+
+/* This is a teat class to check the exact life times of
+ * registers. */
+class LifetimeEvaluatorExactTest : public testing::Test {
+protected:
+ void run(const vector<MockCodeline>& code, const expectation& e);
+};
+
+/* This test class checks that the life time covers at least
+ * in the expected range. It is used for cases where we know that
+ * a the implementation could be improved on estimating the minimal
+ * life time.
+ */
+class LifetimeEvaluatorAtLeastTest : public testing::Test {
+protected:
+ void run(const vector<MockCodeline>& code, const expectation& e);
+};
+
+
+TEST_F(LifetimeEvaluatorExactTest, SimpleMoveAdd)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_UADD, {out0}, {1, in0}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run(code, expectation({{-1, -1}, {0,1}}));
+}
+
+
+TEST_F(LifetimeEvaluatorExactTest, SimpleMoveAddMove)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_UADD, {2}, {1,in0}, {}},
+ { TGSI_OPCODE_MOV, {out0}, {2}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run(code, expectation({{-1, -1}, {0,1}, {1,2}}));
+}
+
+TEST_F(LifetimeEvaluatorExactTest, SimpleMoveAddMoveTexoffset)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {2}, {in1}, {}},
+ { TGSI_OPCODE_UADD, {out0}, {}, {1,2}},
+ { TGSI_OPCODE_END}
+ };
+ run(code, expectation({{-1, -1}, {0,2}, {1,2}}));
+}
+
+
+TEST_F(LifetimeEvaluatorExactTest, SimpleMoveInLoop)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_UADD, {2}, {1, in0}, {}},
+ { TGSI_OPCODE_UADD, {3}, {1, 2}, {}},
+ { TGSI_OPCODE_UADD, {3}, {3, in1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 5}, {2,3}, {3, 6}}));
+}
+
+
+/* in loop if/else value written only in one path, and read later
+ * - value must survive the whole loop */
+TEST_F(LifetimeEvaluatorExactTest, MoveInIfInLoop)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF},
+ { TGSI_OPCODE_UADD, {2}, {1, in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_UADD, {3}, {1, 2}, {}},
+ { TGSI_OPCODE_UADD, {3}, {3, in1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 7}, {1,7}, {5, 8}}));
+}
+
+
+// in loop if/else value written in both path, and read later
+// - value must survive from first write to last read in loop
+// for now we only check that the minimum life time is correct
+TEST_F(LifetimeEvaluatorAtLeastTest, WriteInIfAndElseInLoop)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF},
+ { TGSI_OPCODE_UADD, {2}, {1, in0}, {}},
+ { TGSI_OPCODE_ELSE },
+ { TGSI_OPCODE_MOV, {2}, {1}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_UADD, {3}, {1, 2}, {}},
+ { TGSI_OPCODE_UADD, {3}, {3, in1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 9}, {3,7}, {7, 10}}));
+}
+
+/* in loop if/else value written in both path, red in else path
+ * before read and also read later- value must survive from first
+ * write to last read in loop */
+TEST_F(LifetimeEvaluatorExactTest, WriteInIfAndElseReadInElseInLoop)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF},
+ { TGSI_OPCODE_UADD, {2}, {1, in0}, {}},
+ { TGSI_OPCODE_ELSE },
+ { TGSI_OPCODE_ADD, {2}, {1, 2}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_UADD, {3}, {1, 2}, {}},
+ { TGSI_OPCODE_UADD, {3}, {3, in1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 9}, {1,9}, {7, 10}}));
+}
+
+/* in loop if/else read in one path before written in the same loop
+ * - value must survive the whole loop */
+TEST_F(LifetimeEvaluatorExactTest, ReadInIfInLoopBeforeWrite)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_UADD, {2}, {1, 3}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_UADD, {3}, {1, 2}, {}},
+ { TGSI_OPCODE_UADD, {3}, {3, in1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 7}, {1,7}, {1, 8}}));
+}
+
+/* Write in nested ifs in loop, for now we do test whether the
+ * life time is atleast what is required, but we know that the
+ * implementation doesn't do a full check and sets larger boundaries
+ */
+TEST_F(LifetimeEvaluatorAtLeastTest, NestedIfInLoopAlwaysWriteButNotPropagated)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ELSE},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ELSE},
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ELSE},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP }, // 15
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{3, 14}}));
+}
+
+
+
+TEST_F(LifetimeEvaluatorExactTest, NestedIfInLoopWriteNotAlways)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ELSE},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ELSE},
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP }, // 13
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 13}}));
+}
+
+
+/* if a continue is in the loop, all variables written after the
+ * continue and used outside the loop must be maintained for the
+ * whole loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithWriteAfterContinue)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_CONT},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 6}}));
+}
+
+/* if a continue is in the loop, all variables written after the
+ * continue and used outside the loop must be maintained for the
+ * whole outer loop */
+TEST_F(LifetimeEvaluatorExactTest, NestedLoopWithWriteAfterContinue)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_CONT},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 8}}));
+}
+
+/* Test whether variable is kept also if the continue is in a
+ * higher scope than the variable write */
+TEST_F(LifetimeEvaluatorExactTest, NestedLoopWithWriteInLoopAfterContinue)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_CONT},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 10}}));
+}
+
+/* if a continue is in the loop, all variables written after the
+ * continue and used outside the loop must be maintained for all
+ * loops including the read loop */
+TEST_F(LifetimeEvaluatorExactTest, Nested2LoopWithWriteAfterContinue)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_CONT},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 10}}));
+}
+
+/* if a break is in the loop, all variables written after the
+ * break and used outside the loop must be maintained for the
+ * whole loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithWriteAfterBreak)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 6}}));
+}
+
+/* if a break is in the loop, but inside a switch case, so it
+ * referes to the case and not to the loop, the variable doesn't
+ * need to survive the loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithWriteAfterBreakInSwitch)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in1}, {}},
+ { TGSI_OPCODE_CASE, {}, {in1}, {}},
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_DEFAULT},
+ { TGSI_OPCODE_ENDSWITCH},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{8, 10}}));
+}
+
+/* if a break is in the loop, but inside a switch case, so it
+ * referes to that inner loop. The variable has to survive the loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithWriteAfterBreakInSwitchInLoop)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_SWITCH, {}, {in1}, {}},
+ { TGSI_OPCODE_CASE, {}, {in1}, {}},
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_DEFAULT, {}, {}, {}},
+ { TGSI_OPCODE_ENDSWITCH, {}, {}, {}},
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{2, 10}}));
+}
+
+
+/* if a break is in the loop, all variables written after the
+ * break and used outside the loop must be maintained for the
+ * whole loop that includes the read */
+TEST_F(LifetimeEvaluatorExactTest, NestedLoopWithWriteAfterBreak)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 8}}));
+}
+
+/* if a break is in the loop, all variables written after the
+ * break and used outside the loop must be maintained for all
+ * loops up onto the read scope */
+TEST_F(LifetimeEvaluatorExactTest, Nested2LoopWithWriteAfterBreak)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{1, 11}}));
+}
+
+/* Temporary used to switch must live through all case statememts */
+TEST_F(LifetimeEvaluatorExactTest, UseSwitchCase)
+{
+ const vector<MockCodeline> code = {
+ {TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ {TGSI_OPCODE_SWITCH, {}, {1}, {}},
+ { TGSI_OPCODE_CASE, {}, {1}, {}},
+ { TGSI_OPCODE_CASE, {}, {1}, {}},
+ { TGSI_OPCODE_BRK},
+ { TGSI_OPCODE_DEFAULT},
+ {TGSI_OPCODE_ENDSWITCH},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 3}}));
+}
+
+/* variable written in a switch within a loop must survive the loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithWriteInSwitch)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in0}, {} },
+ { TGSI_OPCODE_CASE, {}, {in0}, {} },
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_DEFAULT },
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_ENDSWITCH },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 9}}));
+}
+
+/* value written in one case, and read in other, in loop
+ * - must survive the loop */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithReadWriteInSwitchDifferentCase)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in0}, {}},
+ { TGSI_OPCODE_CASE, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_DEFAULT },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_ENDSWITCH },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 9}}));
+}
+
+/* Make sure SWITCH is closed correctly in the scope stack */
+TEST_F(LifetimeEvaluatorExactTest, LoopRWInSwitchCaseLastCaseWithoutBreak)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in0}, {}},
+ { TGSI_OPCODE_CASE, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_DEFAULT },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDSWITCH },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0, 8}}));
+}
+
+
+/* value read/write in same case, stays there */
+TEST_F(LifetimeEvaluatorExactTest, LoopWithReadWriteInSwitchSameCase)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in0}, {}},
+ { TGSI_OPCODE_CASE, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_DEFAULT },
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_ENDSWITCH },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{3,4}}));
+}
+
+/* value read/write in all cases, should only live from first
+ * write to last read, but currently the whole loop is used. */
+TEST_F(LifetimeEvaluatorAtLeastTest, LoopWithReadWriteInSwitchSameCase)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_SWITCH, {}, {in0}, {}},
+ { TGSI_OPCODE_CASE, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {}, {in0}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_DEFAULT },
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_BRK },
+ { TGSI_OPCODE_ENDSWITCH },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{3,9}}));
+}
+
+
+/* value read/write in differnt loops */
+TEST_F(LifetimeEvaluatorExactTest, LoopsWithDifferntScopes)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{1,5}}));
+}
+
+/* value read/write in differnt loops, conditional */
+TEST_F(LifetimeEvaluatorExactTest, LoopsWithDifferntScopesConditionalWrite)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0,7}}));
+}
+
+/* first read before first write wiredness with nested loops */
+TEST_F(LifetimeEvaluatorExactTest, LoopsWithDifferentScopesCondReadBeforeWrite)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_IF, {}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {out0}, {1}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_BGNLOOP },
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_ENDLOOP },
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0,9}}));
+}
+
+/* register is only written. This should not happen,
+ * but to handle the case we want the register to life
+ * at least past the write instruction */
+TEST_F(LifetimeEvaluatorExactTest, WriteOnly)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0,1}}));
+}
+
+/* register read in if */
+TEST_F(LifetimeEvaluatorExactTest, SimpleReadForIf)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_ADD, {out0}, {in0, in1}, {}},
+ { TGSI_OPCODE_IF, {}, {1}, {}},
+ { TGSI_OPCODE_ENDIF}
+ };
+ run (code, expectation({{-1,-1},{0,2}}));
+}
+
+/* register read in switch */
+TEST_F(LifetimeEvaluatorExactTest, SimpleReadForSwitchAndCase)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_SWITCH, {}, {1}, {}},
+ { TGSI_OPCODE_CASE, {}, {1}, {}},
+ { TGSI_OPCODE_CASE, {}, {1}, {}},
+ { TGSI_OPCODE_ENDSWITCH},
+ };
+ run (code, expectation({{-1,-1},{0,3}}));
+}
+
+/* Check that a missing END is handled (Unigine-Haven creates such a
+ * shader) */
+TEST_F(LifetimeEvaluatorExactTest, DistinceScopesAndNoEndProgramId)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_IF, {}, {1}, {}},
+ { TGSI_OPCODE_MOV, {2}, {1}, {}},
+ { TGSI_OPCODE_ENDIF},
+ { TGSI_OPCODE_IF, {}, {1}, {}},
+ { TGSI_OPCODE_MOV, {out0}, {2}, {}},
+ { TGSI_OPCODE_ENDIF},
+
+ };
+ run (code, expectation({{-1,-1},{0,4}, {2,5}}));
+}
+
+/* Dead code elimination should catch and remove the case
+ * when a variable is written after its last read, but
+ * we want the code to be aware of this case.
+ * The life time of this uselessly written variable is set
+ * to the instruction after the write, because
+ * otherwise it could be re-used too early.
+*/
+TEST_F(LifetimeEvaluatorExactTest, WritePastLastRead)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {2}, {1}, {}},
+ { TGSI_OPCODE_MOV, {1}, {2}, {}},
+ { TGSI_OPCODE_END},
+
+ };
+ run (code, expectation({{-1,-1},{0,3}, {1,2}}));
+}
+
+/*
+ * Somehow a duplicate of above tests specifically using the
+ * problematic corner case n question. DFRACEXP has two
+ * destinations, and if one value is thrown away, we must ensure
+ * that the two output registers don't merge.
+ * In this test case the last access for 2 and 3 is in line 4,
+ * but only 3 can be merged with 4 because it is read, 2 on the
+ * other hand is written to, and merging it with 4 would result in
+ * undefined behaviour.
+*/
+TEST_F(LifetimeEvaluatorExactTest, WritePastLastRead2)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_MOV, {1}, {in0}, {}},
+ { TGSI_OPCODE_MOV, {2}, {in0}, {}},
+ { TGSI_OPCODE_ADD, {3}, {1,2}, {}},
+ { TGSI_OPCODE_DFRACEXP , {2,4}, {3}, {}},
+ { TGSI_OPCODE_MOV, {out1}, {4}, {}},
+ { TGSI_OPCODE_END},
+
+ };
+ run (code, expectation({{-1,-1},{0,2}, {1,4}, {2,3}, {3,4}}));
+}
+
+
+TEST_F(LifetimeEvaluatorExactTest, OnlyWriteOne)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_DFRACEXP , {1, 2}, {in0}, {}},
+ { TGSI_OPCODE_ADD , {3}, {2, in0}, {}},
+ { TGSI_OPCODE_MOV, {out1}, {3}, {}},
+ { TGSI_OPCODE_END},
+
+ };
+ run (code, expectation({{-1,-1},{0,1}, {0,1}, {1,2}}));
+}
+
+
+/* Check that two destination registers are actually used */
+TEST_F(LifetimeEvaluatorExactTest, TwoDestRegisters)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_DFRACEXP , {1,2}, {in0}, {}},
+ { TGSI_OPCODE_ADD, {out0}, {1,2}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0,1}, {0,1}}));
+}
+
+/* Check that two destination registers and three source registers
+ * are used */
+TEST_F(LifetimeEvaluatorExactTest, ThreeSourceRegisters)
+{
+ const vector<MockCodeline> code = {
+ { TGSI_OPCODE_DFRACEXP , {1,2}, {in0}, {}},
+ { TGSI_OPCODE_ADD , {3}, {in0, in1}, {}},
+ { TGSI_OPCODE_MAD, {out0}, {1,2, 3}, {}},
+ { TGSI_OPCODE_END}
+ };
+ run (code, expectation({{-1,-1},{0,2}, {0,2}, {1,2}}));
+}
+
+
+class RegisterRemapping : public testing::Test {
+protected:
+ void run(const vector<pair<int, int>>& lt, const vector<int>& expect);
+};
+
+void RegisterRemapping::run(const vector<pair<int, int>>& lt,
+ const vector<int>& expect)
+{
+ rename_reg_pair proto{false, 0};
+ vector<rename_reg_pair> result(lt.size(), proto);
+
+ evaluate_remapping(lt, &result[0]);
+
+ vector<int> remap(lt.size());
+ for (unsigned i = 0; i < lt.size(); ++i) {
+ remap[i] = result[i].valid ? result[i].new_reg : i;
+ }
+
+ std::transform(remap.begin(), remap.end(), result.begin(), remap.begin(),
+ [](int x, const rename_reg_pair& rn) {
+ return rn.valid ? rn.new_reg : x;
+ });
+
+ for(unsigned i = 1; i < remap.size(); ++i)
+ EXPECT_EQ(remap[i], expect[i]);
+}
+
+TEST_F(RegisterRemapping, RegisterRemapping1)
+{
+ vector<pair<int, int>> lt({{-1,-1},
+ {0, 1},
+ {0, 2},
+ {1, 2},
+ {2, 10},
+ {3, 5},
+ {5, 10}
+ });
+
+ vector<int> expect({0, 1, 2, 1, 1, 2, 2});
+ run(lt, expect);
+}
+
+
+TEST_F(RegisterRemapping, RegisterRemapping2)
+{
+ vector<pair<int, int>> lt({{-1,-1},
+ {0, 1},
+ {0, 2},
+ {3, 3},
+ {4, 4},
+ });
+ vector<int> expect({0, 1, 2, 1, 1});
+ run(lt, expect);
+}
+
+
+
+MockShader::~MockShader()
+{
+ free();
+ ralloc_free(mem_ctx);
+}
+
+int MockShader::get_num_temps()
+{
+ return num_temps;
+}
+
+
+exec_list* MockShader::get_program()
+{
+ return program;
+}
+
+MockShader::MockShader(const vector<MockCodeline>& source):
+ num_temps(0)
+{
+ mem_ctx = ralloc_context(NULL);
+
+ program = new(mem_ctx) exec_list();
+
+ for (MockCodeline i: source) {
+ glsl_to_tgsi_instruction *next_instr = new(mem_ctx) glsl_to_tgsi_instruction();
+ next_instr->op = i.op;
+ next_instr->info = tgsi_get_opcode_info(i.op);
+
+ assert(i.src.size() < 4);
+ assert(i.dst.size() < 3);
+ assert(i.tex_offsets.size() < 3);
+
+ for (unsigned k = 0; k < i.src.size(); ++k) {
+ next_instr->src[k] = create_src_register(i.src[k]);
+ }
+ for (unsigned k = 0; k < i.dst.size(); ++k) {
+ next_instr->dst[k] = create_dst_register(i.dst[k]);
+ }
+
+ // set texture registers
+ next_instr->tex_offset_num_offset = i.tex_offsets.size();
+ if (i.tex_offsets.size() > 0)
+ next_instr->tex_offsets = new st_src_reg[i.tex_offsets.size()];
+ else
+ next_instr->tex_offsets = 0;
+ for (unsigned k = 0; k < i.tex_offsets.size(); ++k) {
+ next_instr->tex_offsets[k] = create_src_register(i.tex_offsets[k]);
+ }
+
+ program->push_tail(next_instr);
+ }
+ ++num_temps;
+}
+
+void MockShader::free()
+{
+ // the list is not fully initialized, so
+ // tearing it down also must be done manually.
+ exec_node *p;
+ while ((p = program->pop_head())) {
+ glsl_to_tgsi_instruction * instr = static_cast<glsl_to_tgsi_instruction *>(p);
+ if (instr->tex_offset_num_offset > 0)
+ delete[] instr->tex_offsets;
+ delete p;
+ }
+ program = 0;
+ num_temps = 0;
+}
+
+st_src_reg MockShader::create_src_register(int src_idx)
+{
+ gl_register_file file;
+ int idx = 0;
+ if (src_idx > 0) {
+ file = PROGRAM_TEMPORARY;
+ idx = src_idx;
+ if (num_temps < idx)
+ num_temps = idx;
+ } else {
+ file = PROGRAM_INPUT;
+ idx = -src_idx;
+ }
+ return st_src_reg(file, idx, GLSL_TYPE_INT);
+
+}
+
+st_dst_reg MockShader::create_dst_register(int dst_idx)
+{
+ gl_register_file file;
+ int idx = 0;
+ if (dst_idx > 0) {
+ file = PROGRAM_TEMPORARY;
+ idx = dst_idx;
+ if (num_temps < idx)
+ num_temps = idx;
+ } else {
+ file = PROGRAM_OUTPUT;
+ idx = - dst_idx;
+ }
+ return st_dst_reg(file, 0xF, GLSL_TYPE_INT, idx);
+}
+
+void LifetimeEvaluatorExactTest::run(const vector<MockCodeline>& code, const expectation& e)
+{
+ MockShader shader(code);
+
+ auto lifetimes = estimate_temporary_lifetimes(shader.get_program(), shader.get_num_temps());
+
+ // lifetimes[0] not used, but created for simpler processing
+ ASSERT_EQ(lifetimes.size(), e.size());
+
+ for (unsigned i = 1; i < lifetimes.size(); ++i) {
+ EXPECT_EQ(lifetimes[i].first, e[i][0]);
+ EXPECT_EQ(lifetimes[i].second, e[i][1]);
+ }
+}
+
+void LifetimeEvaluatorAtLeastTest::run(const vector<MockCodeline>& code, const expectation& e)
+{
+ MockShader shader(code);
+
+ auto lifetimes = estimate_temporary_lifetimes(shader.get_program(), shader.get_num_temps());
+
+ // lifetimes[0] not used, but created for simpler processing
+ ASSERT_EQ(lifetimes.size(), e.size());
+
+ for (unsigned i = 1; i < lifetimes.size(); ++i) {
+ EXPECT_LE(lifetimes[i].first, e[i][0]);
+ EXPECT_GE(lifetimes[i].second, e[i][1]);
+ }
+}
--
2.13.0