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arm: Fix the warning -mcpu=cortex-m55 conflicting with -march=armv8.1-m.main (pr97327). 

This patch fixes (PR97327) the warning -mcpu=cortex-m55 conflicts with -march=armv8.1-m.main
for -mfloat-abi=soft by adding the isa_bit_mve_float to clearing FP bit list.

The following combination are fixed with this patch:
$ cat bug.c
int main(){
return 0;
}

$ arm-none-eabi-gcc -mcpu=cortex-m55 -mfloat-abi=soft bug.c -c
$ arm-none-eabi-gcc -mcpu=cortex-m55 -mfloat-abi=soft -march=armv8.1-m.main+mve bug.c -c

Before this patch for above combinations:
cc1: warning: switch '-mcpu=cortex-m55' conflicts with '-march=armv8.1-m.main' switch

After this patch for above combinations no warning/errors.

gcc/ChangeLog:

2020-10-16  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	PR target/97327
	* config/arm/arm.c (fp_bitlist): Add isa_bit_mve_float to FP bits array.

gcc/testsuite/ChangeLog:

	PR target/97327
	* gcc.target/arm/mve/intrinsics/pr97327.c: New test.
This commit is contained in:
Srinath Parvathaneni 2020-10-16 14:53:28 +01:00
parent 6c6e0cafa3
commit 90042c43a9
2 changed files with 10 additions and 1 deletions
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3
gcc/config/arm/arm.c
View File

@ -3429,8 +3429,9 @@ arm_option_override (void)
{
static const enum isa_feature fpu_bitlist_internal[]
= { ISA_ALL_FPU_INTERNAL, isa_nobit };
/* isa_bit_mve_float is also part of FP bit list for arch v8.1-m.main. */
static const enum isa_feature fp_bitlist[]
= { ISA_ALL_FP, isa_nobit };
= { ISA_ALL_FP, isa_bit_mve_float, isa_nobit };
static const enum isa_feature quirk_bitlist[] = { ISA_ALL_QUIRKS, isa_nobit};
cl_target_option opts;

8
gcc/testsuite/gcc.target/arm/mve/intrinsics/pr97327.c Normal file
View File

@ -0,0 +1,8 @@
/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
/* { dg-skip-if "Incompatible float ABI" { *-*-* } { "-mfloat-abi=hard" } { "" } } */
/* { dg-additional-options "-mcpu=cortex-m55 -mfloat-abi=soft -mfpu=auto -Werror" } */
int main ()
{
return 0;
}