[CudaSPIRV] Add support for optional spir-v attributes (llvm#116589)

Add support for optional spir-v attributes.

Test plan:
ninja check-all

Author: alexander-shaposhnikov

clang/lib/CodeGen/CodeGenFunction.cpp

@@ -635,7 +635,9 @@ void CodeGenFunction::EmitKernelMetadata(const FunctionDecl *FD,
 
   CGM.GenKernelArgMetadata(Fn, FD, this);
 
-  if (!getLangOpts().OpenCL)
+  if (!(getLangOpts().OpenCL ||
+        (getLangOpts().CUDA &&
+         getContext().getTargetInfo().getTriple().isSPIRV())))
     return;
 
   if (const VecTypeHintAttr *A = FD->getAttr<VecTypeHintAttr>()) {
@@ -1022,6 +1024,8 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
   }
 
   if (FD && (getLangOpts().OpenCL ||
+             (getLangOpts().CUDA &&
+              getContext().getTargetInfo().getTriple().isSPIRV()) ||
              ((getLangOpts().HIP || getLangOpts().OffloadViaLLVM) &&
               getLangOpts().CUDAIsDevice))) {
     // Add metadata for a kernel function.

clang/lib/Sema/SemaDeclAttr.cpp

@@ -7368,7 +7368,9 @@ void Sema::ProcessDeclAttributeList(
   // good to have a way to specify "these attributes must appear as a group",
   // for these. Additionally, it would be good to have a way to specify "these
   // attribute must never appear as a group" for attributes like cold and hot.
-  if (!D->hasAttr<OpenCLKernelAttr>()) {
+  if (!(D->hasAttr<OpenCLKernelAttr>() ||
+        (D->hasAttr<CUDAGlobalAttr>() &&
+         Context.getTargetInfo().getTriple().isSPIRV()))) {
     // These attributes cannot be applied to a non-kernel function.
     if (const auto *A = D->getAttr<ReqdWorkGroupSizeAttr>()) {
       // FIXME: This emits a different error message than

clang/test/CodeGenCUDASPIRV/spirv-attrs.cu

@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -fcuda-is-device -triple spirv64 -o - -emit-llvm -x cuda %s  | FileCheck %s
+// RUN: %clang_cc1 -fcuda-is-device -triple spirv32 -o - -emit-llvm -x cuda %s  | FileCheck %s
+
+#define __global__ __attribute__((global))
+
+__attribute__((reqd_work_group_size(128, 1, 1)))
+__global__ void reqd_work_group_size_128_1_1() {}
+
+__attribute__((work_group_size_hint(2, 2, 2)))
+__global__ void work_group_size_hint_2_2_2() {}
+
+__attribute__((vec_type_hint(int)))
+__global__ void vec_type_hint_int() {}
+
+__attribute__((intel_reqd_sub_group_size(64)))
+__global__ void intel_reqd_sub_group_size_64() {}
+
+// CHECK: define spir_kernel void @_Z28reqd_work_group_size_128_1_1v() #[[ATTR:[0-9]+]] !reqd_work_group_size ![[WG_SIZE:[0-9]+]]
+// CHECK: define spir_kernel void @_Z26work_group_size_hint_2_2_2v() #[[ATTR]] !work_group_size_hint ![[WG_HINT:[0-9]+]]
+// CHECK: define spir_kernel void @_Z17vec_type_hint_intv() #[[ATTR]] !vec_type_hint ![[VEC_HINT:[0-9]+]]
+// CHECK: define spir_kernel void @_Z28intel_reqd_sub_group_size_64v() #[[ATTR]] !intel_reqd_sub_group_size ![[SUB_GRP:[0-9]+]]
+
+// CHECK: attributes #[[ATTR]] = { {{.*}} }
+
+// CHECK: ![[WG_SIZE]] = !{i32 128, i32 1, i32 1}
+// CHECK: ![[WG_HINT]] = !{i32 2, i32 2, i32 2}
+// CHECK: ![[VEC_HINT]] = !{i32 undef, i32 1}
+// CHECK: ![[SUB_GRP]] = !{i32 64}

clang/test/SemaCUDA/spirv-attrs.cu

@@ -0,0 +1,18 @@
+// expected-no-diagnostics
+
+// RUN: %clang_cc1 -triple spirv64 -aux-triple x86_64-unknown-linux-gnu \
+// RUN:   -fcuda-is-device -verify -fsyntax-only %s
+
+#include "Inputs/cuda.h"
+
+__attribute__((reqd_work_group_size(128, 1, 1)))
+__global__ void reqd_work_group_size_128_1_1() {}
+
+__attribute__((work_group_size_hint(2, 2, 2)))
+__global__ void work_group_size_hint_2_2_2() {}
+
+__attribute__((vec_type_hint(int)))
+__global__ void vec_type_hint_int() {}
+
+__attribute__((intel_reqd_sub_group_size(64)))
+__global__ void intel_reqd_sub_group_size_64() {}