[clang] [llvm] [Coroutines] Replace struct alloca frame with byte array and ptradd (PR #178359)

[Weibo He via cfe-commits]

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@@ -1173,7 +1168,11 @@ static void handleNoSuspendCoroutine(coro::Shape &Shape) {
     coro::replaceCoroFree(SwitchId, /*Elide=*/AllocInst != nullptr);
     if (AllocInst) {
       IRBuilder<> Builder(AllocInst);
-      auto *Frame = Builder.CreateAlloca(Shape.FrameTy);
+      // Create an alloca for a byte array of the frame size
+      auto *FrameTy = ArrayType::get(Type::getInt8Ty(Builder.getContext()),
+                                     Shape.FrameSize);
+      auto *Frame = Builder.CreateAlloca(
+          FrameTy, nullptr, AllocInst->getParent()->getName() + ".Frame");
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NewSigma wrote:

AllocInst->getFunction()->getName()

https://github.com/llvm/llvm-project/pull/178359