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-rw-r--r--src/glsl/glsl_parser_extras.cpp23
-rw-r--r--src/glsl/ir_optimization.h6
-rw-r--r--src/glsl/linker.cpp2
-rw-r--r--src/glsl/main.cpp2
-rw-r--r--src/glsl/opt_dead_code.cpp14
-rw-r--r--src/glsl/test_optpass.cpp4
-rw-r--r--src/mesa/drivers/dri/i965/brw_shader.cpp3
-rw-r--r--src/mesa/main/ff_fragment_shader.cpp2
-rw-r--r--src/mesa/program/ir_to_mesa.cpp6
-rw-r--r--src/mesa/state_tracker/st_glsl_to_tgsi.cpp4
10 files changed, 49 insertions, 17 deletions
diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index a9075b2b1be..e2112fe6dd0 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -883,8 +883,27 @@ ast_struct_specifier::ast_struct_specifier(char *identifier,
this->declarations.push_degenerate_list_at_head(&declarator_list->link);
}
+/**
+ * Do the set of common optimizations passes
+ *
+ * \param ir List of instructions to be optimized
+ * \param linked Is the shader linked? This enables
+ * optimizations passes that remove code at
+ * global scope and could cause linking to
+ * fail.
+ * \param uniform_locations_assigned Have locations already been assigned for
+ * uniforms? This prevents the declarations
+ * of unused uniforms from being removed.
+ * The setting of this flag only matters if
+ * \c linked is \c true.
+ * \param max_unroll_iterations Maximum number of loop iterations to be
+ * unrolled. Setting to 0 forces all loops
+ * to be unrolled.
+ */
bool
-do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations)
+do_common_optimization(exec_list *ir, bool linked,
+ bool uniform_locations_assigned,
+ unsigned max_unroll_iterations)
{
GLboolean progress = GL_FALSE;
@@ -900,7 +919,7 @@ do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iteration
progress = do_copy_propagation(ir) || progress;
progress = do_copy_propagation_elements(ir) || progress;
if (linked)
- progress = do_dead_code(ir) || progress;
+ progress = do_dead_code(ir, uniform_locations_assigned) || progress;
else
progress = do_dead_code_unlinked(ir) || progress;
progress = do_dead_code_local(ir) || progress;
diff --git a/src/glsl/ir_optimization.h b/src/glsl/ir_optimization.h
index af80e26b9ff..7b32e84f0d8 100644
--- a/src/glsl/ir_optimization.h
+++ b/src/glsl/ir_optimization.h
@@ -37,7 +37,9 @@
#define MOD_TO_FRACT 0x20
#define INT_DIV_TO_MUL_RCP 0x40
-bool do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iterations);
+bool do_common_optimization(exec_list *ir, bool linked,
+ bool uniform_locations_assigned,
+ unsigned max_unroll_iterations);
bool do_algebraic(exec_list *instructions);
bool do_constant_folding(exec_list *instructions);
@@ -46,7 +48,7 @@ bool do_constant_variable_unlinked(exec_list *instructions);
bool do_copy_propagation(exec_list *instructions);
bool do_copy_propagation_elements(exec_list *instructions);
bool do_constant_propagation(exec_list *instructions);
-bool do_dead_code(exec_list *instructions);
+bool do_dead_code(exec_list *instructions, bool uniform_locations_assigned);
bool do_dead_code_local(exec_list *instructions);
bool do_dead_code_unlinked(exec_list *instructions);
bool do_dead_functions(exec_list *instructions);
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index a7c38a3426a..d4d2496fedd 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -1742,7 +1742,7 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
if (ctx->ShaderCompilerOptions[i].LowerClipDistance)
lower_clip_distance(prog->_LinkedShaders[i]->ir);
- while (do_common_optimization(prog->_LinkedShaders[i]->ir, true, 32))
+ while (do_common_optimization(prog->_LinkedShaders[i]->ir, true, false, 32))
;
}
diff --git a/src/glsl/main.cpp b/src/glsl/main.cpp
index 01921375070..e174224712b 100644
--- a/src/glsl/main.cpp
+++ b/src/glsl/main.cpp
@@ -166,7 +166,7 @@ compile_shader(struct gl_context *ctx, struct gl_shader *shader)
if (!state->error && !shader->ir->is_empty()) {
bool progress;
do {
- progress = do_common_optimization(shader->ir, false, 32);
+ progress = do_common_optimization(shader->ir, false, false, 32);
} while (progress);
validate_ir_tree(shader->ir);
diff --git a/src/glsl/opt_dead_code.cpp b/src/glsl/opt_dead_code.cpp
index cb500d2d105..5b9546ad409 100644
--- a/src/glsl/opt_dead_code.cpp
+++ b/src/glsl/opt_dead_code.cpp
@@ -42,7 +42,7 @@ static bool debug = false;
* for usage on an unlinked instruction stream.
*/
bool
-do_dead_code(exec_list *instructions)
+do_dead_code(exec_list *instructions, bool uniform_locations_assigned)
{
ir_variable_refcount_visitor v;
bool progress = false;
@@ -94,10 +94,11 @@ do_dead_code(exec_list *instructions)
*/
/* uniform initializers are precious, and could get used by another
- * stage.
+ * stage. Also, once uniform locations have been assigned, the
+ * declaration cannot be deleted.
*/
if (entry->var->mode == ir_var_uniform &&
- entry->var->constant_value)
+ (uniform_locations_assigned || entry->var->constant_value))
continue;
entry->var->remove();
@@ -132,7 +133,12 @@ do_dead_code_unlinked(exec_list *instructions)
foreach_iter(exec_list_iterator, sigiter, *f) {
ir_function_signature *sig =
(ir_function_signature *) sigiter.get();
- if (do_dead_code(&sig->body))
+ /* The setting of the uniform_locations_assigned flag here is
+ * irrelevent. If there is a uniform declaration encountered
+ * inside the body of the function, something has already gone
+ * terribly, terribly wrong.
+ */
+ if (do_dead_code(&sig->body, false))
progress = true;
}
}
diff --git a/src/glsl/test_optpass.cpp b/src/glsl/test_optpass.cpp
index 89b7f8338dc..6abafb5d311 100644
--- a/src/glsl/test_optpass.cpp
+++ b/src/glsl/test_optpass.cpp
@@ -64,7 +64,7 @@ do_optimization(struct exec_list *ir, const char *optimization)
if (sscanf(optimization, "do_common_optimization ( %d , %d ) ",
&int_0, &int_1) == 2) {
- return do_common_optimization(ir, int_0 != 0, int_1);
+ return do_common_optimization(ir, int_0 != 0, false, int_1);
} else if (strcmp(optimization, "do_algebraic") == 0) {
return do_algebraic(ir);
} else if (strcmp(optimization, "do_constant_folding") == 0) {
@@ -80,7 +80,7 @@ do_optimization(struct exec_list *ir, const char *optimization)
} else if (strcmp(optimization, "do_constant_propagation") == 0) {
return do_constant_propagation(ir);
} else if (strcmp(optimization, "do_dead_code") == 0) {
- return do_dead_code(ir);
+ return do_dead_code(ir, false);
} else if (strcmp(optimization, "do_dead_code_local") == 0) {
return do_dead_code_local(ir);
} else if (strcmp(optimization, "do_dead_code_unlinked") == 0) {
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 0858c4032bb..d9d9414543d 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -138,7 +138,8 @@ brw_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
false /* loops */
) || progress;
- progress = do_common_optimization(shader->ir, true, 32) || progress;
+ progress = do_common_optimization(shader->ir, true, true, 32)
+ || progress;
} while (progress);
validate_ir_tree(shader->ir);
diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp
index 160a97c0cae..3e449b03e9c 100644
--- a/src/mesa/main/ff_fragment_shader.cpp
+++ b/src/mesa/main/ff_fragment_shader.cpp
@@ -1464,7 +1464,7 @@ create_new_program(struct gl_context *ctx, struct state_key *key)
validate_ir_tree(p.shader->ir);
- while (do_common_optimization(p.shader->ir, false, 32))
+ while (do_common_optimization(p.shader->ir, false, false, 32))
;
reparent_ir(p.shader->ir, p.shader->ir);
diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index fecab50f753..635ebdd53f4 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -3212,7 +3212,9 @@ _mesa_ir_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress;
- progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress;
+ progress = do_common_optimization(ir, true, true,
+ options->MaxUnrollIterations)
+ || progress;
progress = lower_quadop_vector(ir, true) || progress;
@@ -3321,7 +3323,7 @@ _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader)
/* Do some optimization at compile time to reduce shader IR size
* and reduce later work if the same shader is linked multiple times
*/
- while (do_common_optimization(shader->ir, false, 32))
+ while (do_common_optimization(shader->ir, false, false, 32))
;
validate_ir_tree(shader->ir);
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 35fd1ffc13a..145bd7dcd0c 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -5058,7 +5058,9 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress;
- progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress;
+ progress = do_common_optimization(ir, true, true,
+ options->MaxUnrollIterations)
+ || progress;
progress = lower_quadop_vector(ir, false) || progress;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 18:47:37 +0000