[llvm] [InstCombine] Create a class to lazily track computed known bits (PR #66611)
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 10 02:41:13 PDT 2023
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@@ -1566,7 +1566,9 @@ Instruction *InstCombinerImpl::visitAdd(BinaryOperator &I) {
return replaceInstUsesWith(I, Constant::getNullValue(I.getType()));
// A+B --> A|B iff A and B have no bits set in common.
- if (haveNoCommonBitsSet(LHS, RHS, DL, &AC, &I, &DT))
+ CachedBitsConstValue LHSCache(LHS), RHSCache(RHS);
+ if (haveNoCommonBitsSet(LHSCache, RHSCache, DL, &AC, &I, &DT,
+ /* ComputeKnownBitsBeforeHand */ true))
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nikic wrote:
This is actually setting the UseInstrInfo flag. Though after a rebase on https://github.com/llvm/llvm-project/commit/80fa5a6377c44b3e78cddbe43abb79d209abc7e5 that should go away automatically...
https://github.com/llvm/llvm-project/pull/66611
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