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Use BranchProbability compare operators.

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llvm-svn: 143190
This commit is contained in:
Benjamin Kramer 2011-10-28 11:14:31 +00:00
parent b5df9f3cc1
commit 66c9d07549
1 changed files with 3 additions and 8 deletions
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11
lib/CodeGen/MachineBranchProbabilityInfo.cpp
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@ -55,12 +55,8 @@ MachineBranchProbabilityInfo::getEdgeWeight(MachineBasicBlock *Src,
bool MachineBranchProbabilityInfo::isEdgeHot(MachineBasicBlock *Src,
MachineBasicBlock *Dst) const {
// Hot probability is at least 4/5 = 80%
uint32_t Weight = getEdgeWeight(Src, Dst);
uint32_t Sum = getSumForBlock(Src);
// FIXME: Implement BranchProbability::compare then change this code to
// compare this BranchProbability against a static "hot" BranchProbability.
return (uint64_t)Weight * 5 > (uint64_t)Sum * 4;
// FIXME: Compare against a static "hot" BranchProbability.
return getEdgeProbability(Src, Dst) > BranchProbability(4, 5);
}
MachineBasicBlock *
@ -84,8 +80,7 @@ MachineBranchProbabilityInfo::getHotSucc(MachineBasicBlock *MBB) const {
}
}
// FIXME: Use BranchProbability::compare.
if ((uint64_t)MaxWeight * 5 >= (uint64_t)Sum * 4)
if (BranchProbability(MaxWeight, Sum) >= BranchProbability(4, 5))
return MaxSucc;
return 0;