[PATCH] D61194: [HIP] Fix visibility of `__constant__` variables.

[Michael Liao via Phabricator via cfe-commits]

hliao created this revision.
hliao added a reviewer: yaxunl.
Herald added subscribers: cfe-commits, nhaehnle, jvesely.
Herald added a project: clang.

- `__constant__` variables should not be `hidden` as the linker may turn them into `LOCAL` symbols.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61194

Files:
  clang/lib/CodeGen/TargetInfo.cpp
  clang/test/CodeGenCUDA/amdgpu-visibility.cu


Index: clang/test/CodeGenCUDA/amdgpu-visibility.cu
===================================================================
--- /dev/null
+++ clang/test/CodeGenCUDA/amdgpu-visibility.cu
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility default -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-DEFAULT %s
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility protected -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-PROTECTED %s
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -fcuda-is-device -fapply-global-visibility-to-externs -fvisibility hidden -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-HIDDEN %s
+
+#include "Inputs/cuda.h"
+
+// CHECK-DEFAULT: @c = addrspace(4) externally_initialized global
+// CHECK-DEFAULT: @g = addrspace(1) externally_initialized global
+// CHECK-PROTECTED: @c = protected addrspace(4) externally_initialized global
+// CHECK-PROTECTED: @g = protected addrspace(1) externally_initialized global
+// CHECK-HIDDEN: @c = protected addrspace(4) externally_initialized global
+// CHECK-HIDDEN: @g = protected addrspace(1) externally_initialized global
+__constant__ int c;
+__device__ int g;
+
+// CHECK-DEFAULT: define amdgpu_kernel void @_Z3foov()
+// CHECK-PROTECTED: define protected amdgpu_kernel void @_Z3foov()
+// CHECK-HIDDEN: define protected amdgpu_kernel void @_Z3foov()
+__global__ void foo() {
+  g = c;
+}
Index: clang/lib/CodeGen/TargetInfo.cpp
===================================================================
--- clang/lib/CodeGen/TargetInfo.cpp
+++ clang/lib/CodeGen/TargetInfo.cpp
@@ -7847,7 +7847,8 @@
 
   return D->hasAttr<OpenCLKernelAttr>() ||
          (isa<FunctionDecl>(D) && D->hasAttr<CUDAGlobalAttr>()) ||
-         (isa<VarDecl>(D) && D->hasAttr<CUDADeviceAttr>());
+         (isa<VarDecl>(D) &&
+          (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>()));
 }
 
 void AMDGPUTargetCodeGenInfo::setTargetAttributes(


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