[clang] [CIR] Defer definitions of global variables until they are used. (PR #142496)

[Andy Kaylor via cfe-commits]

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@@ -63,6 +63,20 @@ bool CIRGenerator::HandleTopLevelDecl(DeclGroupRef group) {
   return true;
 }
 
+void CIRGenerator::HandleTranslationUnit(ASTContext &astContext) {
+  // Release the Builder when there is no error.
+  if (!diags.hasErrorOccurred() && cgm)
+    cgm->release();
+
+  // If there are errors before or when releasing the CGM, reset the module to
+  // stop here before invoking the backend.
+  if (diags.hasErrorOccurred()) {
+    if (cgm)
+      // TODO: cgm->clear();
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andykaylor wrote:

Yeah... I'm not really sure what's needed here. This TODO comment is in the incubator code. I think the idea is that "something" probably needs to happen to clean up after an error, but it isn't clear what that something should be. I should have replaced this with a MissingFeature.

https://github.com/llvm/llvm-project/pull/142496