[clang] [llvm] [ARM][Clang] Make `+nosimd` functional for AArch32 Targets (PR #130623)

[Martin Storsjö via llvm-commits]

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@@ -0,0 +1,31 @@
+// Ensures that when targeting an ARM target with an Asm file, clang
+// collects the features from the FPU. This is critical in the
+// activation of NEON for supported targets. The Cortex-R52 will be
+// used and tested for VFP and NEON Support
+
+// RUN: %clang -target arm-none-eabi -mcpu=cortex-r52 -c %s -o /dev/null | count 0
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mstorsjo wrote:

This requires a `// REQUIRES: arm-registered-target` (like `armv8.1.m.main.s` has), as this actually does try to compile the code.

Actually compiling code in Clang driver tests would ideally not be done (we should ideally only inspect the generated command lines), but we do seem to have some precedent for it already in `armv8.1.m.main.s`, and especially for the implicit behaviours that aren't necessarily visible in the command line, I guess there's no other good alternative.

So I guess this kind of test is fine, but add the `REQUIRES` line.

https://github.com/llvm/llvm-project/pull/130623