[llvm] [Dwarf][Transforms] Add dwarf support when func signature changed (PR #127855)

[Paul T Robinson via llvm-commits]

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@@ -654,6 +654,15 @@ DIE *DwarfUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
       ->createTypeDIE(Context, *ContextDIE, Ty);
 }
 
+void DwarfUnit::addLLVMChangedArgs(DIE &ScopeDIE, const DISubprogram *SP) {
+  if (!SP->getArgChanged())
+    return;
+
+  auto *LocalDie =
+      DIE::get(DIEValueAllocator, dwarf::DW_TAG_LLVM_func_args_changed);
+  ScopeDIE.addChild(LocalDie);
+}
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pogo59 wrote:

`// TODO: Add specifics about what changed.`
This will clarify that you expect to add more info later, and that's why it's a tag not an attribute. (Which was my first question when reading the code. It took a more careful reading of the commit message to understand the longer-term goal.)

https://github.com/llvm/llvm-project/pull/127855