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Implement isMaxValueMinusOne in terms of APInt instead of uint64_t.

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Patch by Sheng Zhou.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35188 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-19 21:10:28 +00:00
parent 727992c30a
commit 3a2a9fbf99
1 changed files with 4 additions and 5 deletions
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9
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -3449,14 +3449,13 @@ Instruction *InstCombiner::visitFRem(BinaryOperator &I) {
// isMaxValueMinusOne - return true if this is Max-1
static bool isMaxValueMinusOne(const ConstantInt *C, bool isSigned) {
uint32_t TypeBits = C->getType()->getPrimitiveSizeInBits();
if (isSigned) {
// Calculate 0111111111..11111
unsigned TypeBits = C->getType()->getPrimitiveSizeInBits();
int64_t Val = INT64_MAX; // All ones
Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
return C->getSExtValue() == Val-1;
APInt Val(APInt::getSignedMaxValue(TypeBits));
return C->getValue() == Val-1;
}
return C->getZExtValue() == C->getType()->getBitMask()-1;
return C->getValue() == APInt::getAllOnesValue(TypeBits) - 1;
}
// isMinValuePlusOne - return true if this is Min+1