From 15af543f106db9e6ff840828905df4978e68f715 Mon Sep 17 00:00:00 2001 From: Török Edwin Date: Mon, 3 May 2010 07:43:03 -0700 Subject: Reorder LLVM passes, running mem2reg earlier. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This gives a ~30% shader optimization time improvement on blender. Tested by comparing the dumped LLVM modules. Current ordering: time ~/llvm-git/obj/Release-Asserts/bin/opt l.bc -constprop -instcombine -mem2reg -gvn -simplifycfg real 0m1.126s user 0m1.108s sys 0m0.012s With this patch: time ~/llvm-git/obj/Release-Asserts/bin/opt l.bc -mem2reg -constprop -instcombine -gvn -simplifycfg real 0m0.885s user 0m0.880s sys 0m0.000s The overall improvement in blender is ~15%. Blender without the patch takes 1m13s: edwin 5934 87.6 11.5 729440 458296 pts/5 SLl+ 17:35 1:13 blender Blender with the patch takes 1m3s: edwin 5726 94.2 11.2 716424 446168 pts/5 SLl+ 17:32 1:03 blender It is still slow with the patch, but better (most of the optimization time is taken up by GVN, see LLVM PR7023). Signed-off-by: Török Edwin Signed-off-by: José Fonseca --- src/gallium/auxiliary/draw/draw_llvm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/gallium/auxiliary/draw') diff --git a/src/gallium/auxiliary/draw/draw_llvm.c b/src/gallium/auxiliary/draw/draw_llvm.c index 2c234285b5e..ea9b7c90a51 100644 --- a/src/gallium/auxiliary/draw/draw_llvm.c +++ b/src/gallium/auxiliary/draw/draw_llvm.c @@ -182,6 +182,8 @@ draw_llvm_create(struct draw_context *draw) /* These are the passes currently listed in llvm-c/Transforms/Scalar.h, * but there are more on SVN. */ /* TODO: Add more passes */ + LLVMAddCFGSimplificationPass(llvm->pass); + LLVMAddPromoteMemoryToRegisterPass(llvm->pass); LLVMAddConstantPropagationPass(llvm->pass); if(util_cpu_caps.has_sse4_1) { /* FIXME: There is a bug in this pass, whereby the combination of fptosi @@ -190,9 +192,7 @@ draw_llvm_create(struct draw_context *draw) */ LLVMAddInstructionCombiningPass(llvm->pass); } - LLVMAddPromoteMemoryToRegisterPass(llvm->pass); LLVMAddGVNPass(llvm->pass); - LLVMAddCFGSimplificationPass(llvm->pass); init_globals(llvm); -- cgit v1.2.3