[HIP] Support attribute hip_pinned_shadow
This patch introduces support of hip_pinned_shadow variable for HIP.
A hip_pinned_shadow variable is a global variable with attribute hip_pinned_shadow.
It has external linkage on device side and has no initializer. It has internal
linkage on host side and has initializer or static constructor. It can be accessed
in both device code and host code.
This allows HIP runtime to implement support of HIP texture reference.
Differential Revision: https://reviews.llvm.org/D62738
llvm-svn: 364381
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 8563a18..22f70a0 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -7874,12 +7874,24 @@
return D->hasAttr<OpenCLKernelAttr>() ||
(isa<FunctionDecl>(D) && D->hasAttr<CUDAGlobalAttr>()) ||
(isa<VarDecl>(D) &&
- (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>()));
+ (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>() ||
+ D->hasAttr<HIPPinnedShadowAttr>()));
+}
+
+static bool requiresAMDGPUDefaultVisibility(const Decl *D,
+ llvm::GlobalValue *GV) {
+ if (GV->getVisibility() != llvm::GlobalValue::HiddenVisibility)
+ return false;
+
+ return isa<VarDecl>(D) && D->hasAttr<HIPPinnedShadowAttr>();
}
void AMDGPUTargetCodeGenInfo::setTargetAttributes(
const Decl *D, llvm::GlobalValue *GV, CodeGen::CodeGenModule &M) const {
- if (requiresAMDGPUProtectedVisibility(D, GV)) {
+ if (requiresAMDGPUDefaultVisibility(D, GV)) {
+ GV->setVisibility(llvm::GlobalValue::DefaultVisibility);
+ GV->setDSOLocal(false);
+ } else if (requiresAMDGPUProtectedVisibility(D, GV)) {
GV->setVisibility(llvm::GlobalValue::ProtectedVisibility);
GV->setDSOLocal(true);
}