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AMDGPU: Run SIInsertWaits as pre-emit pass

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Running this after the scheduler enables scheduling
waits later so other ALU instructions can run while
this would be waiting.

When combined with enabling the post-RA scheduler, this
gives about a ~20% improvement on sgemm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241473 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2015-07-06 17:02:20 +00:00
parent 96fe9196e9
commit b560f9ca2f
1 changed files with 1 additions and 1 deletions
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2
lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
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@ -280,10 +280,10 @@ void GCNPassConfig::addPostRegAlloc() {
}
void GCNPassConfig::addPreSched2() {
addPass(createSIInsertWaits(*TM), false);
}
void GCNPassConfig::addPreEmitPass() {
addPass(createSIInsertWaits(*TM), false);
addPass(createSILowerControlFlowPass(*TM), false);
}