[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
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@364381 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index 5dd9cfc..93913b0 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -295,6 +295,7 @@
def MicrosoftExt : LangOpt<"MicrosoftExt">;
def Borland : LangOpt<"Borland">;
def CUDA : LangOpt<"CUDA">;
+def HIP : LangOpt<"HIP">;
def COnly : LangOpt<"COnly", "!LangOpts.CPlusPlus">;
def CPlusPlus : LangOpt<"CPlusPlus">;
def OpenCL : LangOpt<"OpenCL">;
@@ -957,6 +958,13 @@
let Documentation = [Undocumented];
}
+def HIPPinnedShadow : InheritableAttr {
+ let Spellings = [GNU<"hip_pinned_shadow">, Declspec<"__hip_pinned_shadow__">];
+ let Subjects = SubjectList<[Var]>;
+ let LangOpts = [HIP];
+ let Documentation = [HIPPinnedShadowDocs];
+}
+
def CUDADeviceBuiltin : IgnoredAttr {
let Spellings = [GNU<"device_builtin">, Declspec<"__device_builtin__">];
let LangOpts = [CUDA];
diff --git a/include/clang/Basic/AttrDocs.td b/include/clang/Basic/AttrDocs.td
index 97e50f9..fac6116 100644
--- a/include/clang/Basic/AttrDocs.td
+++ b/include/clang/Basic/AttrDocs.td
@@ -4183,3 +4183,15 @@
``__attribute__((malloc))``.
}];
}
+
+def HIPPinnedShadowDocs : Documentation {
+ let Category = DocCatType;
+ let Content = [{
+The GNU style attribute __attribute__((hip_pinned_shadow)) or MSVC style attribute
+__declspec(hip_pinned_shadow) can be added to the definition of a global variable
+to indicate it is a HIP pinned shadow variable. A HIP pinned shadow variable can
+be accessed on both device side and host side. It has external linkage and is
+not initialized on device side. It has internal linkage and is initialized by
+the initializer on host side.
+ }];
+}
\ No newline at end of file
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 87a1d45..b0e3b0b 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -2415,7 +2415,8 @@
if (!Global->hasAttr<CUDADeviceAttr>() &&
!Global->hasAttr<CUDAGlobalAttr>() &&
!Global->hasAttr<CUDAConstantAttr>() &&
- !Global->hasAttr<CUDASharedAttr>())
+ !Global->hasAttr<CUDASharedAttr>() &&
+ !(LangOpts.HIP && Global->hasAttr<HIPPinnedShadowAttr>()))
return;
} else {
// We need to emit host-side 'shadows' for all global
@@ -3781,7 +3782,12 @@
!getLangOpts().CUDAIsDevice &&
(D->hasAttr<CUDAConstantAttr>() || D->hasAttr<CUDADeviceAttr>() ||
D->hasAttr<CUDASharedAttr>());
- if (getLangOpts().CUDA && (IsCUDASharedVar || IsCUDAShadowVar))
+ // HIP pinned shadow of initialized host-side global variables are also
+ // left undefined.
+ bool IsHIPPinnedShadowVar =
+ getLangOpts().CUDAIsDevice && D->hasAttr<HIPPinnedShadowAttr>();
+ if (getLangOpts().CUDA &&
+ (IsCUDASharedVar || IsCUDAShadowVar || IsHIPPinnedShadowVar))
Init = llvm::UndefValue::get(getTypes().ConvertType(ASTTy));
else if (!InitExpr) {
// This is a tentative definition; tentative definitions are
@@ -3892,7 +3898,8 @@
// global variables become internal definitions. These have to
// be internal in order to prevent name conflicts with global
// host variables with the same name in a different TUs.
- if (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>()) {
+ if (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>() ||
+ D->hasAttr<HIPPinnedShadowAttr>()) {
Linkage = llvm::GlobalValue::InternalLinkage;
// Shadow variables and their properties must be registered
@@ -3916,7 +3923,8 @@
}
}
- GV->setInitializer(Init);
+ if (!IsHIPPinnedShadowVar)
+ GV->setInitializer(Init);
if (emitter) emitter->finalize(GV);
// If it is safe to mark the global 'constant', do so now.
diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index 8563a18..22f70a0 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/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);
}
diff --git a/lib/Driver/ToolChains/HIP.cpp b/lib/Driver/ToolChains/HIP.cpp
index a60485a..2ec97e7 100644
--- a/lib/Driver/ToolChains/HIP.cpp
+++ b/lib/Driver/ToolChains/HIP.cpp
@@ -170,9 +170,8 @@
const char *InputFileName) const {
// Construct lld command.
// The output from ld.lld is an HSA code object file.
- ArgStringList LldArgs{"-flavor", "gnu", "--no-undefined",
- "-shared", "-o", Output.getFilename(),
- InputFileName};
+ ArgStringList LldArgs{
+ "-flavor", "gnu", "-shared", "-o", Output.getFilename(), InputFileName};
SmallString<128> LldPath(C.getDriver().Dir);
llvm::sys::path::append(LldPath, "lld");
const char *Lld = Args.MakeArgString(LldPath);
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 8670f74..5a1712f 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -6786,6 +6786,10 @@
case ParsedAttr::AT_CUDAHost:
handleSimpleAttributeWithExclusions<CUDAHostAttr, CUDAGlobalAttr>(S, D, AL);
break;
+ case ParsedAttr::AT_HIPPinnedShadow:
+ handleSimpleAttributeWithExclusions<HIPPinnedShadowAttr, CUDADeviceAttr,
+ CUDAConstantAttr>(S, D, AL);
+ break;
case ParsedAttr::AT_GNUInline:
handleGNUInlineAttr(S, D, AL);
break;
diff --git a/test/AST/ast-dump-hip-pinned-shadow.cu b/test/AST/ast-dump-hip-pinned-shadow.cu
new file mode 100644
index 0000000..53d7c8f
--- /dev/null
+++ b/test/AST/ast-dump-hip-pinned-shadow.cu
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -fcuda-is-device -ast-dump -ast-dump-filter tex -x hip %s | FileCheck -strict-whitespace %s
+// RUN: %clang_cc1 -ast-dump -ast-dump-filter tex -x hip %s | FileCheck -strict-whitespace %s
+struct textureReference {
+ int a;
+};
+
+// CHECK: HIPPinnedShadowAttr
+template <class T, int texType, int hipTextureReadMode>
+struct texture : public textureReference {
+texture() { a = 1; }
+};
+
+__attribute__((hip_pinned_shadow)) texture<float, 1, 1> tex;
diff --git a/test/CodeGenCUDA/hip-pinned-shadow.cu b/test/CodeGenCUDA/hip-pinned-shadow.cu
new file mode 100644
index 0000000..75798f7
--- /dev/null
+++ b/test/CodeGenCUDA/hip-pinned-shadow.cu
@@ -0,0 +1,23 @@
+// REQUIRES: amdgpu-registered-target
+
+// RUN: %clang_cc1 -triple amdgcn -fcuda-is-device -std=c++11 -fvisibility hidden -fapply-global-visibility-to-externs \
+// RUN: -emit-llvm -o - -x hip %s | FileCheck -check-prefixes=HIPDEV %s
+// RUN: %clang_cc1 -triple x86_64 -std=c++11 \
+// RUN: -emit-llvm -o - -x hip %s | FileCheck -check-prefixes=HIPHOST %s
+
+struct textureReference {
+ int a;
+};
+
+template <class T, int texType, int hipTextureReadMode>
+struct texture : public textureReference {
+texture() { a = 1; }
+};
+
+__attribute__((hip_pinned_shadow)) texture<float, 2, 1> tex;
+// CUDADEV-NOT: @tex
+// CUDAHOST-NOT: call i32 @__hipRegisterVar{{.*}}@tex
+// HIPDEV: @tex = external addrspace(1) global %struct.texture
+// HIPDEV-NOT: declare{{.*}}void @_ZN7textureIfLi2ELi1EEC1Ev
+// HIPHOST: define{{.*}}@_ZN7textureIfLi2ELi1EEC1Ev
+// HIPHOST: call i32 @__hipRegisterVar{{.*}}@tex{{.*}}i32 0, i32 4, i32 0, i32 0)
diff --git a/test/Driver/hip-toolchain-no-rdc.hip b/test/Driver/hip-toolchain-no-rdc.hip
index 229839d..540b932 100644
--- a/test/Driver/hip-toolchain-no-rdc.hip
+++ b/test/Driver/hip-toolchain-no-rdc.hip
@@ -37,7 +37,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx803" "-o" [[OBJ_DEV_A_803:".*-gfx803-.*o"]]
-// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV_A_803:.*out]]" [[OBJ_DEV_A_803]]
//
@@ -65,7 +65,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx900" "-o" [[OBJ_DEV_A_900:".*-gfx900-.*o"]]
-// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV_A_900:.*out]]" [[OBJ_DEV_A_900]]
//
@@ -109,7 +109,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx803" "-o" [[OBJ_DEV_B_803:".*-gfx803-.*o"]]
-// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV_B_803:.*out]]" [[OBJ_DEV_B_803]]
//
@@ -137,7 +137,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx900" "-o" [[OBJ_DEV_B_900:".*-gfx900-.*o"]]
-// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV_B_900:.*out]]" [[OBJ_DEV_B_900]]
//
diff --git a/test/Driver/hip-toolchain-rdc.hip b/test/Driver/hip-toolchain-rdc.hip
index 055efe6..15ac5f1 100644
--- a/test/Driver/hip-toolchain-rdc.hip
+++ b/test/Driver/hip-toolchain-rdc.hip
@@ -43,7 +43,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx803" "-o" [[OBJ_DEV1:".*-gfx803-.*o"]]
-// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD: ".*lld"]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV1:.*out]]" [[OBJ_DEV1]]
// CHECK: [[CLANG]] "-cc1" "-triple" "amdgcn-amd-amdhsa"
@@ -75,7 +75,7 @@
// CHECK-SAME: "-filetype=obj"
// CHECK-SAME: "-mcpu=gfx900" "-o" [[OBJ_DEV2:".*-gfx900-.*o"]]
-// CHECK: [[LLD]] "-flavor" "gnu" "--no-undefined" "-shared"
+// CHECK: [[LLD]] "-flavor" "gnu" "-shared"
// CHECK-SAME: "-o" "[[IMG_DEV2:.*out]]" [[OBJ_DEV2]]
// CHECK: [[CLANG]] "-cc1" "-triple" "x86_64-unknown-linux-gnu"
diff --git a/test/Misc/pragma-attribute-supported-attributes-list.test b/test/Misc/pragma-attribute-supported-attributes-list.test
index aa71e0b..fc9d86e 100644
--- a/test/Misc/pragma-attribute-supported-attributes-list.test
+++ b/test/Misc/pragma-attribute-supported-attributes-list.test
@@ -53,6 +53,7 @@
// CHECK-NEXT: FlagEnum (SubjectMatchRule_enum)
// CHECK-NEXT: Flatten (SubjectMatchRule_function)
// CHECK-NEXT: GNUInline (SubjectMatchRule_function)
+// CHECK-NEXT: HIPPinnedShadow (SubjectMatchRule_variable)
// CHECK-NEXT: Hot (SubjectMatchRule_function)
// CHECK-NEXT: IBAction (SubjectMatchRule_objc_method_is_instance)
// CHECK-NEXT: IFunc (SubjectMatchRule_function)
diff --git a/test/SemaCUDA/hip-pinned-shadow.cu b/test/SemaCUDA/hip-pinned-shadow.cu
new file mode 100644
index 0000000..c58f709
--- /dev/null
+++ b/test/SemaCUDA/hip-pinned-shadow.cu
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -triple amdgcn -fcuda-is-device -std=c++11 -fvisibility hidden -fapply-global-visibility-to-externs \
+// RUN: -emit-llvm -o - -x hip %s -fsyntax-only -verify
+// RUN: %clang_cc1 -triple x86_64 -std=c++11 \
+// RUN: -emit-llvm -o - -x hip %s -fsyntax-only -verify
+
+#define __device__ __attribute__((device))
+#define __constant__ __attribute__((constant))
+#define __hip_pinned_shadow__ __attribute((hip_pinned_shadow))
+
+struct textureReference {
+ int a;
+};
+
+template <class T, int texType, int hipTextureReadMode>
+struct texture : public textureReference {
+texture() { a = 1; }
+};
+
+__hip_pinned_shadow__ texture<float, 2, 1> tex;
+__device__ __hip_pinned_shadow__ texture<float, 2, 1> tex2; // expected-error{{'hip_pinned_shadow' and 'device' attributes are not compatible}}
+ // expected-error@-1{{dynamic initialization is not supported for __device__, __constant__, and __shared__ variables}}
+ // expected-note@-2{{conflicting attribute is here}}
+__constant__ __hip_pinned_shadow__ texture<float, 2, 1> tex3; // expected-error{{'hip_pinned_shadow' and 'constant' attributes are not compatible}}
+ // expected-error@-1{{dynamic initialization is not supported for __device__, __constant__, and __shared__ variables}}
+ // expected-note@-2{{conflicting attribute is here}}
