[compiler-rt] [libunwind] [AArch64] Fix nofp regressions in compiler-rt and libunwind (PR #111235)

[Oliver Stannard via llvm-commits]

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@@ -238,6 +236,7 @@ END_COMPILERRT_OUTLINE_FUNCTION(__arm_sc_memcpy)
 
 DEFINE_COMPILERRT_FUNCTION_ALIAS(__arm_sc_memmove, __arm_sc_memcpy)
 
+#if defined(__aarch64__) && __ARM_FP != 0
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ostannard wrote:

This could do with a comment explaining why only some are built when `__ARM_FP != 0`, and pointing to the C versions.

https://github.com/llvm/llvm-project/pull/111235