[llvm] [LLVM] Remove nuw neg (PR #86295)

[Yingwei Zheng via llvm-commits]

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@@ -4250,10 +4250,11 @@ static Instruction *canonicalizeAbs(BinaryOperator &Xor,
     // xor (add A, Op1), Op1  ; add -1 and flip bits if negative
     // --> (A < 0) ? -A : A
     Value *IsNeg = Builder.CreateIsNeg(A);
-    // Copy the nuw/nsw flags from the add to the negate.
+    // Copy the nsw flags from the add to the negate.
     auto *Add = cast<BinaryOperator>(Op0);
-    Value *NegA = Builder.CreateNeg(A, "", Add->hasNoUnsignedWrap(),
-                                   Add->hasNoSignedWrap());
+    Value *NegA = Add->hasNoUnsignedWrap()
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dtcxzyw wrote:

This change fixes a regression caused by not propagating nuw flags.


https://github.com/llvm/llvm-project/pull/86295