[HIP] Add predefined macros __HIPCC__ and __HIP_DEVICE_COMPILE__

[yaxunl]

Summary

also disable __CUDA_ARCH__ for HIP.

This patch depends on https://reviews.llvm.org/D44984

[rjmccall]

If so, LGTM.

lib/Frontend/InitPreprocessor.cpp

481

I assume these names are defined by the HIP spec.

[yaxunl]

lib/Frontend/InitPreprocessor.cpp

481

Yes these are defined in the official HIP documentation

https://github.com/ROCm-Developer-Tools/HIP/blob/master/docs/markdown/hip_porting_guide.md

lib/Frontend/InitPreprocessor.cpp

if (LangOpts.CPlusPlus) {
         Builder.defineMacro("__FAST_RELAXED_MATH__");
     }
   }
   // Not "standard" per se, but available even with the -undef flag.
   if (LangOpts.AsmPreprocessor)
     Builder.defineMacro("__ASSEMBLER__");
   if (LangOpts.CUDA && !LangOpts.HIP)
     Builder.defineMacro("__CUDA__");
-  if (LangOpts.HIP)
+  if (LangOpts.HIP) {
     Builder.defineMacro("__HIP__");
+    Builder.defineMacro("__HIPCC__");
+    if (LangOpts.CUDAIsDevice)
+      Builder.defineMacro("__HIP_DEVICE_COMPILE__");
+  }
 }
 
 /// Initialize the predefined C++ language feature test macros defined in
 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
                                                  MacroBuilder &Builder) {
   // C++98 features.
   if (LangOpts.RTTI)
case 45:
     break;
   default:
     // Default version is OpenMP 3.1, in Simd only mode - 4.5
     Builder.defineMacro("_OPENMP", LangOpts.OpenMPSimd ? "201511" : "201107");
     break;
   }
 
   // CUDA device path compilaton
-  if (LangOpts.CUDAIsDevice) {
+  if (LangOpts.CUDAIsDevice && !LangOpts.HIP) {
     // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
     // backend's target defines.
     Builder.defineMacro("__CUDA_ARCH__");
   }
 
   // We need to communicate this to our CUDA header wrapper, which in turn
   // informs the proper CUDA headers of this choice.
   if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) {

test/Preprocessor/predefined-macros.c

 // CHECK-ARM64-MINGW: #define WINNT 1
 // CHECK-ARM64-MINGW: #define _WIN32 1
 // CHECK-ARM64-MINGW: #define _WIN64 1
 // CHECK-ARM64-MINGW: #define __aarch64__ 1
 
 // RUN: %clang_cc1 %s -E -dM -o - -x cl -triple spir-unknown-unknown \
 // RUN:   | FileCheck -match-full-lines %s --check-prefix=CHECK-SPIR
 // CHECK-SPIR: #define __IMAGE_SUPPORT__ 1
+
+// RUN: %clang_cc1 %s -E -dM -o - -x hip -triple amdgcn-amd-amdhsa \
+// RUN:   | FileCheck -match-full-lines %s --check-prefix=CHECK-HIP
+// CHECK-HIP-NOT: #define __CUDA_ARCH__
+// CHECK-HIP: #define __HIPCC__ 1
+// CHECK-HIP-NOT: #define __HIP_DEVICE_COMPILE__ 1
+// CHECK-HIP: #define __HIP__ 1
+
+// RUN: %clang_cc1 %s -E -dM -o - -x hip -triple amdgcn-amd-amdhsa \
+// RUN:   -fcuda-is-device \
+// RUN:   | FileCheck -match-full-lines %s --check-prefix=CHECK-HIP-DEV
+// CHECK-HIP-DEV-NOT: #define __CUDA_ARCH__
+// CHECK-HIP-DEV: #define __HIPCC__ 1
+// CHECK-HIP-DEV: #define __HIP_DEVICE_COMPILE__ 1
+// CHECK-HIP-DEV: #define __HIP__ 1