[clang] [compiler-rt] [llvm] [PGO][HIP] Fix HIP device profile collection and sections emission (PR #202095)

[Yaxun Liu via cfe-commits]

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@@ -1407,6 +1420,26 @@ void CGNVCUDARuntime::emitOffloadProfilingSections() {
       M, PtrTy, /*isConstant=*/false, llvm::GlobalValue::ExternalLinkage,
       llvm::ConstantPointerNull::get(PtrTy), Name);
   CGM.addCompilerUsedGlobal(OffloadProfShadow);
+
+  auto AddSectionShadow = [&](StringRef Kind, const Twine &DeviceName) {
+    std::string ShadowName =
+        (Twine("__llvm_profile_shadow_") + Kind + "_" + CUIDHash + "_" +
+         Twine(OffloadProfSectionShadows.size()))
+            .str();
+    auto *Shadow = new llvm::GlobalVariable(
+        M, PtrTy, /*isConstant=*/false, llvm::GlobalValue::ExternalLinkage,
+        llvm::ConstantPointerNull::get(PtrTy), ShadowName);
+    CGM.addCompilerUsedGlobal(Shadow);
+    OffloadProfSectionShadows.push_back({Shadow, DeviceName.str()});
+  };
+
+  for (auto &&I : EmittedKernels) {
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yxsamliu wrote:

Added the matching CodeGen-side comment.

https://github.com/llvm/llvm-project/pull/202095