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Try to fix the bots by detecting inconsistant branch-weight metadata.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163926 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren 2012-09-14 19:05:19 +00:00
parent 9eed53379f
commit 796d945d54
1 changed files with 10 additions and 4 deletions
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14
lib/Transforms/Utils/SimplifyCFG.cpp
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@ -830,18 +830,24 @@ bool SimplifyCFGOpt::FoldValueComparisonIntoPredecessors(TerminatorInst *TI,
bool PredHasWeights = HasBranchWeights(PTI);
bool SuccHasWeights = HasBranchWeights(TI);
if (PredHasWeights)
if (PredHasWeights) {
GetBranchWeights(PTI, Weights);
else if (SuccHasWeights)
// branch-weight metadata is inconsistant here.
if (Weights.size() != 1 + PredCases.size())
PredHasWeights = SuccHasWeights = false;
} else if (SuccHasWeights)
// If there are no predecessor weights but there are successor weights,
// populate Weights with 1, which will later be scaled to the sum of
// successor's weights
Weights.assign(1 + PredCases.size(), 1);
SmallVector<uint64_t, 8> SuccWeights;
if (SuccHasWeights)
if (SuccHasWeights) {
GetBranchWeights(TI, SuccWeights);
else if (PredHasWeights)
// branch-weight metadata is inconsistant here.
if (SuccWeights.size() != 1 + BBCases.size())
PredHasWeights = SuccHasWeights = false;
} else if (PredHasWeights)
SuccWeights.assign(1 + BBCases.size(), 1);
if (PredDefault == BB) {