[PATCH] D124466: [CUDA][HIP] Fix linkage of __clang_gpu_used_external

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: tra.
Herald added a subscriber: mattd.
Herald added a project: All.
yaxunl requested review of this revision.

Different TU's may have this globl var. appending linkage can
only be used with lld recognized special variables.

Change it to internal linkage.


https://reviews.llvm.org/D124466

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/test/CodeGenCUDA/host-used-extern.cu


Index: clang/test/CodeGenCUDA/host-used-extern.cu
===================================================================
--- clang/test/CodeGenCUDA/host-used-extern.cu
+++ clang/test/CodeGenCUDA/host-used-extern.cu
@@ -11,7 +11,7 @@
 
 #include "Inputs/cuda.h"
 
-// CHECK-LABEL: @__clang_gpu_used_external = appending {{.*}}global
+// CHECK-LABEL: @__clang_gpu_used_external = internal {{.*}}global
 // CHECK-DAG: @_Z7kernel1v
 // CHECK-DAG: @_Z7kernel4v
 // CHECK-DAG: @var1
Index: clang/lib/CodeGen/CodeGenModule.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenModule.cpp
+++ clang/lib/CodeGen/CodeGenModule.cpp
@@ -599,7 +599,7 @@
     llvm::ArrayType *ATy = llvm::ArrayType::get(Int8PtrTy, UsedArray.size());
 
     auto *GV = new llvm::GlobalVariable(
-        getModule(), ATy, false, llvm::GlobalValue::AppendingLinkage,
+        getModule(), ATy, false, llvm::GlobalValue::InternalLinkage,
         llvm::ConstantArray::get(ATy, UsedArray), "__clang_gpu_used_external");
     addCompilerUsedGlobal(GV);
   }


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