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Micro-optimize SCEVConstant comparison.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111142 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-08-16 16:25:35 +00:00
parent 2f199f9952
commit e28d7922f7
1 changed files with 4 additions and 4 deletions
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8
lib/Analysis/ScalarEvolution.cpp
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@ -590,12 +590,12 @@ namespace {
// Compare constant values.
if (const SCEVConstant *LC = dyn_cast<SCEVConstant>(LHS)) {
const SCEVConstant *RC = cast<SCEVConstant>(RHS);
const ConstantInt *LCC = LC->getValue();
const ConstantInt *RCC = RC->getValue();
unsigned LBitWidth = LCC->getBitWidth(), RBitWidth = RCC->getBitWidth();
const APInt &LA = LC->getValue()->getValue();
const APInt &RA = RC->getValue()->getValue();
unsigned LBitWidth = LA.getBitWidth(), RBitWidth = RA.getBitWidth();
if (LBitWidth != RBitWidth)
return LBitWidth < RBitWidth;
return LCC->getValue().ult(RCC->getValue());
return LA.ult(RA);
}
// Compare addrec loop depths.