[InstCombine] Add constant vector support for X udiv C, where C >= signbit
llvm-svn: 324728
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
index a5c6b97..b9d8e8f 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
@@ -1067,8 +1067,7 @@
// X udiv C, where C >= signbit
static Instruction *foldUDivNegCst(Value *Op0, Value *Op1,
const BinaryOperator &I, InstCombiner &IC) {
- Value *ICI = IC.Builder.CreateICmpULT(Op0, cast<ConstantInt>(Op1));
-
+ Value *ICI = IC.Builder.CreateICmpULT(Op0, cast<Constant>(Op1));
return SelectInst::Create(ICI, Constant::getNullValue(I.getType()),
ConstantInt::get(I.getType(), 1));
}
@@ -1111,12 +1110,11 @@
return Actions.size();
}
- if (ConstantInt *C = dyn_cast<ConstantInt>(Op1))
- // X udiv C, where C >= signbit
- if (C->getValue().isNegative()) {
- Actions.push_back(UDivFoldAction(foldUDivNegCst, C));
- return Actions.size();
- }
+ // X udiv C, where C >= signbit
+ if (match(Op1, m_Negative())) {
+ Actions.push_back(UDivFoldAction(foldUDivNegCst, Op1));
+ return Actions.size();
+ }
// X udiv (C1 << N), where C1 is "1<<C2" --> X >> (N+C2)
if (match(Op1, m_Shl(m_Power2(), m_Value())) ||