From: Srinath Parvathaneni Date: Fri, 16 Oct 2020 13:53:28 +0000 (+0100) Subject: arm: Fix the warning -mcpu=cortex-m55 conflicting with -march=armv8.1-m.main (pr97327). X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=90042c43a92c452a5f9f3afbfcdad511ea09a54f;p=gcc.git 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 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. --- diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 0b8c5fa074d..dfadaca6fdf 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -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; diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr97327.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr97327.c new file mode 100644 index 00000000000..8f6d3606381 --- /dev/null +++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr97327.c @@ -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; +}