[llvm] [IPSCCP] Variable not visible at Og: (PR #77901)

[Stephen Tozer via llvm-commits]

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@@ -3586,10 +3586,13 @@ DIExpression *llvm::getExpressionForConstant(DIBuilder &DIB, const Constant &C,
     return createIntegerExpression(C);
 
   auto *FP = dyn_cast<ConstantFP>(&C);
-  if (FP && (Ty.isFloatTy() || Ty.isDoubleTy())) {
+  if (FP &&
+      (Ty.isBFloatTy() || Ty.isHalfTy() || Ty.isFloatTy() || Ty.isDoubleTy())) {
     const APFloat &APF = FP->getValueAPF();
-    return DIB.createConstantValueExpression(
-        APF.bitcastToAPInt().getZExtValue());
+    APInt const &API = APF.bitcastToAPInt();
+    if (auto Temp = API.tryZExtValue())
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SLTozer wrote:

Now that we aren't supporting values >64bits, I think this can revert to using `getZExtValue`, since `tryZExtValue` only returns `std::nullopt` if `getActiveBits() <= 64`.

https://github.com/llvm/llvm-project/pull/77901