move a zext specific xform out of commonIntCastTransforms into visitZExt and modernize it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92770 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp
index e2bb3fb..4b8c553 100644
--- a/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -645,16 +645,6 @@
cast<BinaryOperator>(SrcI)->getOpcode(), Op0c, Op1c);
}
}
-
- // cast (xor bool X, true) to int --> xor (cast bool X to int), 1
- if (isa<ZExtInst>(CI) && SrcBitSize == 1 &&
- SrcI->getOpcode() == Instruction::Xor &&
- Op1 == ConstantInt::getTrue(CI.getContext()) &&
- (!Op0->hasOneUse() || !isa<CmpInst>(Op0))) {
- Value *New = Builder->CreateZExt(Op0, DestTy, Op0->getName());
- return BinaryOperator::CreateXor(New,
- ConstantInt::get(CI.getType(), 1));
- }
break;
}
return 0;
@@ -933,6 +923,15 @@
}
}
+ // zext (xor i1 X, true) to i32 --> xor (zext i1 X to i32), 1
+ Value *X;
+ if (SrcI && SrcI->getType()->isInteger(1) &&
+ match(SrcI, m_Not(m_Value(X))) &&
+ (!X->hasOneUse() || !isa<CmpInst>(X))) {
+ Value *New = Builder->CreateZExt(X, CI.getType());
+ return BinaryOperator::CreateXor(New, ConstantInt::get(CI.getType(), 1));
+ }
+
return 0;
}