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draw/llvm: Add additional llvm optimization passes

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It helps a bit with vertex shader performance on i915g
(a couple percent faster with openarena).

I have tried most other passes, and they weren't showing
any measurable improvement. Note that my vertex shaders
didn't have loops, so maybe the loop optimizations could
still be useful in the future.

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Stéphane Marchesin 2013-05-05 04:34:40 -07:00
parent 0b0d6f97cf
commit 1c56fc1025
1 changed files with 3 additions and 0 deletions
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3
src/gallium/auxiliary/gallivm/lp_bld_init.c
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@ -147,7 +147,10 @@ create_pass_manager(struct gallivm_state *gallivm)
* but there are more on SVN.
* TODO: Add more passes.
*/
LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
LLVMAddLICMPass(gallivm->passmgr);
LLVMAddCFGSimplificationPass(gallivm->passmgr);
LLVMAddReassociatePass(gallivm->passmgr);
if (HAVE_LLVM >= 0x207 && sizeof(void*) == 4) {
/* For LLVM >= 2.7 and 32-bit build, use this order of passes to