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R600/SI: Allow partial unrolling and increase thresholds.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213985 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2014-07-25 23:02:42 +00:00
parent 3aa56ba98e
commit ee17bf3fd4
1 changed files with 7 additions and 1 deletions
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8
lib/Target/R600/AMDGPUTargetTransformInfo.cpp
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@ -101,6 +101,12 @@ bool AMDGPUTTI::hasBranchDivergence() const { return true; }
void AMDGPUTTI::getUnrollingPreferences(Loop *L,
UnrollingPreferences &UP) const {
UP.Threshold = 300; // Twice the default.
UP.Count = UINT_MAX;
UP.Partial = true;
// TODO: Do we want runtime unrolling?
for (const BasicBlock *BB : L->getBlocks()) {
for (const Instruction &I : *BB) {
const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(&I);
@ -120,7 +126,7 @@ void AMDGPUTTI::getUnrollingPreferences(Loop *L,
//
// Don't use the maximum allowed value here as it will make some
// programs way too big.
UP.Threshold = 500;
UP.Threshold = 800;
}
}
}