[ValueTracking] Replace all uses of ComputeSignBit with computeKnownBits.
This patch finishes off the conversion of ComputeSignBit to computeKnownBits.
Differential Revision: https://reviews.llvm.org/D33166
llvm-svn: 303035
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
index b857c04..2a35259 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
@@ -162,11 +162,9 @@
// product is exactly the minimum negative number.
// E.g. mul i16 with 17 sign bits: 0xff00 * 0xff80 = 0x8000
// For simplicity we just check if at least one side is not negative.
- bool LHSNonNegative, LHSNegative;
- bool RHSNonNegative, RHSNegative;
- ComputeSignBit(LHS, LHSNonNegative, LHSNegative, /*Depth=*/0, &CxtI);
- ComputeSignBit(RHS, RHSNonNegative, RHSNegative, /*Depth=*/0, &CxtI);
- if (LHSNonNegative || RHSNonNegative)
+ KnownBits LHSKnown = computeKnownBits(LHS, /*Depth=*/0, &CxtI);
+ KnownBits RHSKnown = computeKnownBits(RHS, /*Depth=*/0, &CxtI);
+ if (LHSKnown.isNonNegative() || RHSKnown.isNonNegative())
return true;
}
return false;