[clang] [CIR] Wire const goto labels into indirect branch (PR #201644)

[via cfe-commits]

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@@ -1564,6 +1576,11 @@ void CIRGenFunction::instantiateIndirectGotoBlock() {
                           {builder.getUnknownLoc()});
 }
 
+void CIRGenFunction::takeAddressOfConstantLabel(cir::BlockAddrInfoAttr info) {
+  constBlockAddressLabels.push_back(info);
+  instantiateIndirectGotoBlock();
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adams381 wrote:

Moved instantiation to `emitIndirectGotoStmt`, so a function that takes a label address but never does `goto *` emits no indirect branch (no more poison fallback). That diverges from classic, which still emits a dead poisoned indirectbr; `h` and `E` (label-values.c) cover it.

https://github.com/llvm/llvm-project/pull/201644