diff options
| author | Tom Stellard <[email protected]> | 2015-04-10 17:07:16 +0000 |
|---|---|---|
| committer | Tom Stellard <[email protected]> | 2015-04-14 13:37:05 +0000 |
| commit | c6d79ed289a75f13c65f011be870f7e43a0fedc7 (patch) | |
| tree | d5e89b092930c2c02559906c171bc26ae9982a52 | |
| parent | 2569c7109d466137ac2b9964db3427ccf2bbf49e (diff) | |
radeon/llvm: Run LLVM's instruction combining pass
This should improve code quality in general and will help with some
future changes to how we emit kill instructions.
shader-db shows a few regressions, but these don't seem to be the result
of deficiencies in instcombine. They're mostly caused by the scheduler
making different decisions than before.
shader-db stats (bonaire):
979 shaders
Totals:
SGPRS: 35056 -> 34872 (-0.52 %)
VGPRS: 20624 -> 20696 (0.35 %)
Code Size: 764372 -> 749032 (-2.01 %) bytes
LDS: 11 -> 11 (0.00 %) blocks
Scratch: 12288 -> 12288 (0.00 %) bytes per wave
Totals from affected shaders:
SGPRS: 13264 -> 13072 (-1.45 %)
VGPRS: 8248 -> 8316 (0.82 %)
Code Size: 486320 -> 470992 (-3.15 %) bytes
LDS: 11 -> 11 (0.00 %) blocks
Scratch: 11264 -> 11264 (0.00 %) bytes per wave
Increases:
SGPRS: 6 (0.01 %)
VGPRS: 20 (0.02 %)
Code Size: 14 (0.01 %)
LDS: 0 (0.00 %)
Scratch: 0 (0.00 %)
Decreases:
SGPRS: 32 (0.03 %)
VGPRS: 8 (0.01 %)
Code Size: 244 (0.25 %)
LDS: 0 (0.00 %)
Scratch: 0 (0.00 %)
*** BY PERCENTAGE ***
Max Increase:
SGPRS: 32 -> 48 (50.00 %)
VGPRS: 12 -> 20 (66.67 %)
Code Size: 216 -> 224 (3.70 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Scratch: 0 -> 0 (0.00 %) bytes per wave
Max Decrease:
SGPRS: 40 -> 32 (-20.00 %)
VGPRS: 16 -> 12 (-25.00 %)
Code Size: 368 -> 280 (-23.91 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Scratch: 0 -> 0 (0.00 %) bytes per wave
*** BY UNIT ***
Max Increase:
SGPRS: 32 -> 48 (50.00 %)
VGPRS: 28 -> 36 (28.57 %)
Code Size: 39320 -> 40132 (2.07 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Scratch: 0 -> 0 (0.00 %) bytes per wave
Max Decrease:
SGPRS: 72 -> 64 (-11.11 %)
VGPRS: 48 -> 40 (-16.67 %)
Code Size: 6272 -> 5852 (-6.70 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Scratch: 0 -> 0 (0.00 %) bytes per wave
Reviewed-by: Marek Olšák <[email protected]>
| -rw-r--r-- | src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c index 1690194a417..91c56a3e631 100644 --- a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c +++ b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c @@ -1579,6 +1579,7 @@ void radeon_llvm_finalize_module(struct radeon_llvm_context * ctx) LLVMAddLICMPass(gallivm->passmgr); LLVMAddAggressiveDCEPass(gallivm->passmgr); LLVMAddCFGSimplificationPass(gallivm->passmgr); + LLVMAddInstructionCombiningPass(gallivm->passmgr); /* Run the pass */ LLVMRunFunctionPassManager(gallivm->passmgr, ctx->main_fn); |