use -mfpu=neon for arm/simd/vmmla_1.c

[Alexandre Oliva <oliva@adacore.com>]

On some of our arm targets, we get various -mfpu flags implicitly or
explicitly passed to the compiler during test runs.  The target
options pushed in arm_neon.h that affect vmmlaq_s32 set isa_bit_neon,
but the caller doesn't have that bit set, so arm_can_inline_p rejects
the attempt to inline it, and the test fails.

An explicit -mfpu=neon would address the compile problem, but cause
the assembler to reject the generated code.

So this patch adds -mfpu=auto to the test, overriding any implicit
flags with the fpu implied by the arch.

Regstrapped on x86_64-linux-gnu, also tested on x-arm-wrs-vxworks7r2.
Ok to install?


for  gcc/testsuite/ChangeLog

	* gcc.target/arm/simd/vmmla_1.c: Pass -mfpu=auto.
---
 gcc/testsuite/gcc.target/arm/simd/vmmla_1.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/arm/simd/vmmla_1.c b/gcc/testsuite/gcc.target/arm/simd/vmmla_1.c
index aeb4a359e3351..d33ebf361d436 100644
--- a/gcc/testsuite/gcc.target/arm/simd/vmmla_1.c
+++ b/gcc/testsuite/gcc.target/arm/simd/vmmla_1.c
@@ -1,6 +1,6 @@
 /* { dg-do assemble } */
 /* { dg-require-effective-target arm_v8_2a_i8mm_ok } */
-/* { dg-options "-save-temps -O2 -march=armv8.2-a+i8mm -mfloat-abi=hard" } */
+/* { dg-options "-save-temps -O2 -march=armv8.2-a+i8mm -mfpu=auto -mfloat-abi=hard" } */
 
 #include "arm_neon.h"
 

-- 
Alexandre Oliva, happy hacker  https://FSFLA.org/blogs/lxo/
   Free Software Activist         GNU Toolchain Engineer
        Vim, Vi, Voltei pro Emacs -- GNUlius Caesar