[llvm] [InstCombineCompare] Use known bits to insert assume intrinsics. (PR #96017)
via llvm-commits
llvm-commits at lists.llvm.org
Fri Jun 21 15:23:41 PDT 2024
================
@@ -6333,6 +6337,125 @@ bool InstCombinerImpl::replacedSelectWithOperand(SelectInst *SI,
return false;
}
+static void computeClosestIntsSatisfyingKnownBits(
+ APInt Target, KnownBits &Known, unsigned BitWidth, bool IsSigned,
+ APInt &ClosestSmaller, APInt &ClosestBigger) {
+ int KnownZeroMaskLength = BitWidth - Known.Zero.countLeadingZeros();
+ if (KnownZeroMaskLength == 0)
+ return;
+
+ APInt PowOf2(BitWidth, 1 << KnownZeroMaskLength);
----------------
goldsteinn wrote:
`APInt::getOneBitSet(BitWidth, KnownZeroMaskLength)`
https://github.com/llvm/llvm-project/pull/96017
More information about the llvm-commits
mailing list