================
@@ -371,6 +372,52 @@ static bool runIPSCCP(
StoreInst *SI = cast<StoreInst>(GV->user_back());
SI->eraseFromParent();
}
+
+ // Try to create a debug constant expression for the glbal variable
+ // initializer value.
+ SmallVector<DIGlobalVariableExpression *, 1> GVEs;
+ GV->getDebugInfo(GVEs);
+ if (GVEs.size() == 1) {
+ DIBuilder DIB(M);
+
+ // Create integer constant expression.
+ auto createIntExpression = [&DIB](const Constant *CV) -> DIExpression * {
+ const APInt &API = dyn_cast<ConstantInt>(CV)->getValue();
+ std::optional<uint64_t> InitIntOpt;
+ if (API.isNonNegative())
+ InitIntOpt = API.tryZExtValue();
+ else if (auto Temp = API.trySExtValue(); Temp.has_value())
+ // Transform a signed optional to unsigned optional.
+ InitIntOpt = (uint64_t)Temp.value();
+ return DIB.createConstantValueExpression(InitIntOpt.value());
----------------
CarlosAlbertoEnciso wrote:
Changed to use `cast`.
https://github.com/llvm/llvm-project/pull/66745
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