[clang] [clang][AMDGPU] Don't define feature macros on host code (PR #83558)

[Yaxun Liu via cfe-commits]

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@@ -4306,10 +4306,10 @@
 
 // Begin amdgcn tests ----------------
 
-// RUN: %clang -mcpu=gfx803 -E -dM %s -o - 2>&1 \
+// RUN: %clang -mcpu=gfx803 -E -dM -Xclang -fcuda-is-device %s -o - 2>&1 \
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yxsamliu wrote:

C code compiled with target amdgcn should not depend on -fcuda-is-device since it is only compiled for device

https://github.com/llvm/llvm-project/pull/83558