r300g: add a new debug option which disables compiler optimizations

Those are:
- dead-code elimination
- constant folding
- peephole (mainly copy propagation)
- register allocation

There are some bugs which I need to track down.

Also fix up the descriptions of all the debug options.

3 files changed, 9 insertions, 6 deletions

diff --git a/src/mesa/drivers/dri/r300/compiler/r3xx_fragprog.c b/src/mesa/drivers/dri/r300/compiler/r3xx_fragprog.c
index 096afe8ad6..137267f4a6 100644
--- a/src/mesa/drivers/dri/r300/compiler/r3xx_fragprog.c
+++ b/src/mesa/drivers/dri/r300/compiler/r3xx_fragprog.c
@@ -94,6 +94,7 @@ void r3xx_compile_fragment_program(struct r300_fragment_program_compiler* c)
 {
 	int is_r500 = c->Base.is_r500;
 	int kill_consts = c->Base.remove_unused_constants;
+	int opt = !c->Base.disable_optimizations;
 
 	/* Lists of instruction transformations. */
 	struct radeon_program_transformation rewrite_tex[] = {
@@ -128,9 +129,9 @@ void r3xx_compile_fragment_program(struct r300_fragment_program_compiler* c)
 		{"transform TEX",		1, 1,		rc_local_transform,		rewrite_tex},
 		{"native rewrite",		1, is_r500,	rc_local_transform,		native_rewrite_r500},
 		{"native rewrite",		1, !is_r500,	rc_local_transform,		native_rewrite_r300},
-		{"deadcode",			1, 1,		rc_dataflow_deadcode,		dataflow_outputs_mark_use},
+		{"deadcode",			1, opt,		rc_dataflow_deadcode,		dataflow_outputs_mark_use},
 		{"emulate loops",		1, !is_r500,	rc_emulate_loops,		NULL},
-		{"dataflow optimize",		1, 1,		rc_optimize,			NULL},
+		{"dataflow optimize",		1, opt,		rc_optimize,			NULL},
 		{"dataflow swizzles",		1, 1,		rc_dataflow_swizzles,		NULL},
 		{"dead constants",		1, kill_consts, rc_remove_unused_constants,	&c->code->constants_remap_table},
 		/* This pass makes it easier for the scheduler to group TEX
@@ -139,7 +140,7 @@ void r3xx_compile_fragment_program(struct r300_fragment_program_compiler* c)
 		{"register rename",		1, !is_r500,	rc_rename_regs,			NULL},
 		{"pair translate",		1, 1,		rc_pair_translate,		NULL},
 		{"pair scheduling",		1, 1,		rc_pair_schedule,		NULL},
-		{"register allocation",		1, 1,		rc_pair_regalloc,		NULL},
+		{"register allocation",		1, opt,		rc_pair_regalloc,		NULL},
 		{"final code validation",	0, 1,		rc_validate_final_shader,	NULL},
 		{"machine code generation",	0, is_r500,	r500BuildFragmentProgramHwCode,	NULL},
 		{"machine code generation",	0, !is_r500,	r300BuildFragmentProgramHwCode,	NULL},
diff --git a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
index e9fb49e7c1..3e8a8236c0 100644
--- a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
+++ b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c
@@ -991,6 +991,7 @@ void r3xx_compile_vertex_program(struct r300_vertex_program_compiler *c)
 {
 	int is_r500 = c->Base.is_r500;
 	int kill_consts = c->Base.remove_unused_constants;
+	int opt = !c->Base.disable_optimizations;
 
 	/* Lists of instruction transformations. */
 	struct radeon_program_transformation alu_rewrite_r500[] = {
@@ -1029,12 +1030,12 @@ void r3xx_compile_vertex_program(struct r300_vertex_program_compiler *c)
 		{"native rewrite",		1, is_r500,	rc_local_transform,		alu_rewrite_r500},
 		{"native rewrite",		1, !is_r500,	rc_local_transform,		alu_rewrite_r300},
 		{"emulate modifiers",		1, !is_r500,	rc_local_transform,		emulate_modifiers},
-		{"deadcode",			1, 1,		rc_dataflow_deadcode,		dataflow_outputs_mark_used},
-		{"dataflow optimize",		1, 1,		rc_optimize,			NULL},
+		{"deadcode",			1, opt,		rc_dataflow_deadcode,		dataflow_outputs_mark_used},
+		{"dataflow optimize",		1, opt,		rc_optimize,			NULL},
 		/* This pass must be done after optimizations. */
 		{"source conflict resolve",	1, 1,		rc_local_transform,		resolve_src_conflicts},
 		{"dataflow swizzles",		1, 1,		rc_dataflow_swizzles,		NULL},
-		{"register allocation",		1, 1,		allocate_temporary_registers,	NULL},
+		{"register allocation",		1, opt,		allocate_temporary_registers,	NULL},
 		{"dead constants",		1, kill_consts, rc_remove_unused_constants,	&c->code->constants_remap_table},
 		{"final code validation",	0, 1,		rc_validate_final_shader,	NULL},
 		{"machine code generation",	0, 1,		translate_vertex_program,	NULL},
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_compiler.h b/src/mesa/drivers/dri/r300/compiler/radeon_compiler.h
index f6a8e83434..85c2e43ad6 100644
--- a/src/mesa/drivers/dri/r300/compiler/radeon_compiler.h
+++ b/src/mesa/drivers/dri/r300/compiler/radeon_compiler.h
@@ -42,6 +42,7 @@ struct radeon_compiler {
 	/* Hardware specification. */
 	unsigned is_r500:1;
 	unsigned has_half_swizzles:1;
+	unsigned disable_optimizations:1;
 	unsigned max_temp_regs;
 	unsigned max_constants;
 	int max_alu_insts;