[llvm] [InstCombine] fold `sub(zext(ptrtoint), zext(ptrtoint))` (PR #115369)
Yingwei Zheng via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 13 16:31:39 PST 2024
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@@ -2631,6 +2631,21 @@ Instruction *InstCombinerImpl::visitSub(BinaryOperator &I) {
/* IsNUW */ false))
return replaceInstUsesWith(I, Res);
+ if (match(Op0, m_ZExt(m_PtrToInt(m_Value(LHSOp)))) &&
+ match(Op1, m_ZExtOrSelf(m_PtrToInt(m_Value(RHSOp))))) {
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dtcxzyw wrote:
Not sure if we need one-use check here.
https://github.com/llvm/llvm-project/pull/115369
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