[HIP] Add -fvisibility hidden option to clang

AMDGPU target need -fvisibility hidden option for clang to
work around a limitation of no PLT support, otherwise there is compilation
error at -O0.

Differential Revision: https://reviews.llvm.org/D51434

llvm-svn: 341077

diff --git a/clang/lib/Driver/ToolChains/HIP.cpp b/clang/lib/Driver/ToolChains/HIP.cpp
index 03acf45..6efcfae 100644 (file)
--- a/clang/lib/Driver/ToolChains/HIP.cpp
+++ b/clang/lib/Driver/ToolChains/HIP.cpp
@@ -247,6 +247,12 @@ void HIPToolChain::addClangTargetOptions(
   if (DriverArgs.hasFlag(options::OPT_fcuda_rdc, options::OPT_fno_cuda_rdc,
                          false))
     CC1Args.push_back("-fcuda-rdc");
+
+  // Default to "hidden" visibility, as object level linking will not be
+  // supported for the foreseeable future.
+  if (!DriverArgs.hasArg(options::OPT_fvisibility_EQ,
+                         options::OPT_fvisibility_ms_compat))
+    CC1Args.append({"-fvisibility", "hidden"});
 }
 
 llvm::opt::DerivedArgList *

diff --git a/clang/test/Driver/hip-toolchain.hip b/clang/test/Driver/hip-toolchain.hip
index 7e0bdc3..8bdce48 100644 (file)
--- a/clang/test/Driver/hip-toolchain.hip
+++ b/clang/test/Driver/hip-toolchain.hip
@@ -15,13 +15,15 @@
 // CHECK: [[CLANG:".*clang.*"]] "-cc1" "-triple" "amdgcn-amd-amdhsa" 
 // CHECK-SAME: "-aux-triple" "x86_64-unknown-linux-gnu" "-emit-llvm-bc"
 // CHECK-SAME: {{.*}} "-main-file-name" "a.cu" {{.*}} "-target-cpu" "gfx803"
-// CHECK-SAME: "-fcuda-is-device" {{.*}} "-o" [[A_BC:".*bc"]] "-x" "hip"
+// CHECK-SAME: "-fcuda-is-device" "-fvisibility" "hidden"
+// CHECK-SAME: {{.*}} "-o" [[A_BC:".*bc"]] "-x" "hip"
 // CHECK-SAME: {{.*}} [[A_SRC:".*a.cu"]]
 
 // CHECK: [[CLANG]] "-cc1" "-triple" "amdgcn-amd-amdhsa"
 // CHECK-SAME: "-aux-triple" "x86_64-unknown-linux-gnu" "-emit-llvm-bc"
 // CHECK-SAME: {{.*}} "-main-file-name" "b.hip" {{.*}} "-target-cpu" "gfx803"
-// CHECK-SAME: "-fcuda-is-device" {{.*}} "-o" [[B_BC:".*bc"]] "-x" "hip"
+// CHECK-SAME: "-fcuda-is-device" "-fvisibility" "hidden"
+// CHECK-SAME: {{.*}} "-o" [[B_BC:".*bc"]] "-x" "hip"
 // CHECK-SAME: {{.*}} [[B_SRC:".*b.hip"]]
 
 // CHECK: [[LLVM_LINK:"*.llvm-link"]] [[A_BC]] [[B_BC]]