[clang] [llvm] Clang/buildFMulAdd: Use negated attribute (PR #121038)

[Matt Arsenault via llvm-commits]

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@@ -4120,6 +4120,10 @@ static Value* buildFMulAdd(llvm::Instruction *MulOp, Value *Addend,
         CGF.CGM.getIntrinsic(llvm::Intrinsic::experimental_constrained_fmuladd,
                              Addend->getType()),
         {MulOp0, MulOp1, Addend});
+    if (negMul)
+      dyn_cast<llvm::CallBase>(FMulAdd)->addParamAttr(0, llvm::Attribute::Negated);
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arsenm wrote:

unchecked dyn_cast 

https://github.com/llvm/llvm-project/pull/121038