[llvm] [clang] [ARM] .fpu equals fpv5-d16 disables floating point MVE which leads to unsupported MVE instructions assembler error for cortex M85/M55. (PR #71545)

[David Spickett via llvm-commits]

================
@@ -0,0 +1,56 @@
+; REQUIRES: arm-registered-target
+; RUN: %clang --target=arm-none-eabi -mcpu=cortex-m85 -mfloat-abi=hard -save-temps=obj -S -o - %s | FileCheck %s
+; RUN: %clang --target=arm-none-eabi -mcpu=cortex-m55 -mfloat-abi=hard -save-temps=obj -S -o - %s | FileCheck %s
+; RUN: %clang --target=arm-none-eabi -mcpu=cortex-m85 -mfloat-abi=hard -O2 -c -mthumb -save-temps=obj %s
+; RUN: %clang --target=arm-none-eabi -mcpu=cortex-m55 -mfloat-abi=hard -O2 -c -mthumb -save-temps=obj %s
+; CHECK: .fpu   fpv5-d16
+; CHECK  .arch_extension mve.fp
----------------
DavidSpickett wrote:

Is arch_extension expected to always be on the very next line? If so, CHECK-NEXT would be bit more robust.

https://github.com/llvm/llvm-project/pull/71545