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Use m_APInt in SimplifyCFG 

Switch from m_Constant to m_APInt per David's request. NFC.

Author: Thomas Jablin (tjablin)
Reviewers: majnemer cycheng

http://reviews.llvm.org/D21440

llvm-svn: 272977
This commit is contained in:
Chuang-Yu Cheng 2016-06-17 00:04:39 +00:00
parent c737ef5d21
commit 5078f94690
1 changed files with 5 additions and 5 deletions
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10
llvm/lib/Transforms/Utils/SimplifyCFG.cpp
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@ -442,7 +442,7 @@ private:
}
Value *RHSVal;
ConstantInt *RHSC;
const APInt *RHSC;
// Pattern match a special case
// (x & ~2^z) == y --> x == y || x == y|2^z
@ -487,8 +487,8 @@ private:
);
*/
if (match(ICI->getOperand(0),
m_And(m_Value(RHSVal), m_ConstantInt(RHSC)))) {
APInt Mask = ~RHSC->getValue();
m_And(m_Value(RHSVal), m_APInt(RHSC)))) {
APInt Mask = ~*RHSC;
if (Mask.isPowerOf2() && (C->getValue() & ~Mask) == C->getValue()) {
// If we already have a value for the switch, it has to match!
if (!setValueOnce(RHSVal))
@ -519,8 +519,8 @@ private:
// Shift the range if the compare is fed by an add. This is the range
// compare idiom as emitted by instcombine.
Value *CandidateVal = I->getOperand(0);
if (match(I->getOperand(0), m_Add(m_Value(RHSVal), m_ConstantInt(RHSC)))) {
Span = Span.subtract(RHSC->getValue());
if (match(I->getOperand(0), m_Add(m_Value(RHSVal), m_APInt(RHSC)))) {
Span = Span.subtract(*RHSC);
CandidateVal = RHSVal;
}