[llvm] [SelectionDAGBuilder] Propagate fast-math flags to fpext (PR #167574)

[Mikołaj Piróg via llvm-commits]

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@@ -3976,7 +3976,10 @@ void SelectionDAGBuilder::visitFPExt(const User &I) {
   SDValue N = getValue(I.getOperand(0));
   EVT DestVT = DAG.getTargetLoweringInfo().getValueType(DAG.getDataLayout(),
                                                         I.getType());
-  setValue(&I, DAG.getNode(ISD::FP_EXTEND, getCurSDLoc(), DestVT, N));
+  SDNodeFlags Flags;
+  if (auto *TruncInst = dyn_cast<FPMathOperator>(&I))
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mikolaj-pirog wrote:

Sorry for long delay, here's the PR: https://github.com/llvm/llvm-project/pull/173792

https://github.com/llvm/llvm-project/pull/167574