[clang] [AMDGPU] Do not emit arch dependent macros with unspecified cpu (PR #80035)

[Yaxun Liu via cfe-commits]

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@@ -4294,13 +4294,20 @@
 
 // Begin amdgcn tests ----------------
 
-// RUN: %clang -march=amdgcn -E -dM %s -o - 2>&1 \
+// RUN: %clang -mcpu=gfx803 -E -dM %s -o - 2>&1 \
+// RUN:     -target amdgcn-unknown-unknown \
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_AMDGCN,CHECK_AMDGCN_803
+// RUN: %clang -E -dM %s -o - 2>&1 \
 // RUN:     -target amdgcn-unknown-unknown \
-// RUN:   | FileCheck -match-full-lines %s -check-prefix=CHECK_AMDGCN
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_AMDGCN,CHECK_AMDGCN_NONE
 // CHECK_AMDGCN: #define __AMDGCN__ 1
-// CHECK_AMDGCN: #define __HAS_FMAF__ 1
-// CHECK_AMDGCN: #define __HAS_FP64__ 1
-// CHECK_AMDGCN: #define __HAS_LDEXPF__ 1
+// CHECK_AMDGCN_803: #define __HAS_FMAF__ 1
+// CHECK_AMDGCN_803: #define __HAS_FP64__ 1
+// CHECK_AMDGCN_803: #define __HAS_LDEXPF__ 1
+// CHECK_AMDGCN_NONE-NOT: #define __HAS_FMAF__
+// CHECK_AMDGCN_NONE-NOT: #define __HAS_FP64__
+// CHECK_AMDGCN_NONE-NOT: #define __HAS_LDEXPF__
+// CHECK_AMDGCN_NONE-NOT: #define __AMDGCN_WAVEFRONT_SIZE__
 
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yxsamliu wrote:

we need a test for HIP host compilation by -x hip --offload-host-only

https://github.com/llvm/llvm-project/pull/80035