[clang] [CUDA] Correctly set CUDA default architecture (PR #84017)

[Joseph Huber via cfe-commits]

================
@@ -2,56 +2,56 @@
 // REQUIRES: nvptx-registered-target
 // REQUIRES: zlib
 
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -g -gz 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -g -gz 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -gdwarf -fdebug-info-for-profiling 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -gdwarf -fdebug-info-for-profiling 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -gdwarf-2 -gsplit-dwarf 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -gdwarf-2 -gsplit-dwarf 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -gdwarf-3 -glldb 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -gdwarf-3 -glldb 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -gdwarf-4 -gcodeview 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -gdwarf-4 -gcodeview 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -gdwarf-5 -gmodules 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -gdwarf-5 -gmodules 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -ggdb1 -fdebug-macro 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -ggdb1 -fdebug-macro 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -ggdb2 -ggnu-pubnames 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -ggdb2 -ggnu-pubnames 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -ggdb3 -gdwarf-aranges 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -ggdb3 -gdwarf-aranges 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
-// RUN: not %clang -### --target=x86_64-linux-gnu -c %s -g -gcolumn-info -fdebug-types-section 2>&1 \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -c %s -g -gcolumn-info -fdebug-types-section 2>&1 \
 // RUN: | FileCheck %s --check-prefixes WARN,COMMON
 
 // Same tests for OpenMP
-// RUN: not %clang -### --target=x86_64-linux-gnu -fopenmp=libomp -fopenmp-targets=nvptx64-nvidia-cuda -c %s \
+// RUN: %clang -### --target=x86_64-linux-gnu --offload-arch=sm_52 -nogpulib -nogpuinc -fopenmp=libomp -c %s \
----------------
jhuber6 wrote:

`--offload-arch` and and `-fopenmp-targets=` are semantically equivalent in this context. They both enable the OpenMP offloding toolchain targeting NVPTX. The only difference is that `--offload-arch` sets the architecture manually while `-fopenmp-targets=` will look up the architecture through the `nvptx-arch` tool, which is extra work that I don't think is necessary for a test like this.

https://github.com/llvm/llvm-project/pull/84017