On 30/03/2021 13:37, Christophe Lyon via Gcc-patches wrote:
When compiling with -mfloat-abi=hard -march=armv8.1-m.main+mve, we
want to emit Tag_ABI_VFP_args even though we are not emitting
floating-point instructions (we need "+mve.fp" for that), because we
use MVE registers to pass FP arguments.

This patch removes the condition on (! TARGET_SOFT_FLOAT) because this
is a case where TARGET_SOFT_FLOAT is true, and TARGET_HARD_FLOAT_ABI
is true too.

2021-03-30  Richard Earnshaw  <richard.earns...@arm.com>

        gcc/
        PR target/99773
        * config/arm/arm.c (arm_file_start): Fix emission of
        Tag_ABI_VFP_args attribute.

For historical reasons, for commits I use rearn...@arm.com as my email address.

Otherwise, OK.

R.

:)

---
  gcc/config/arm/arm.c | 11 ++++-------
  1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index e89f5e2..518bfed 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -28150,14 +28150,11 @@ arm_file_start (void)
        if (print_tune_info)
        arm_print_tune_info ();
- if (! TARGET_SOFT_FLOAT)
-       {
-         if (TARGET_HARD_FLOAT && TARGET_VFP_SINGLE)
-           arm_emit_eabi_attribute ("Tag_ABI_HardFP_use", 27, 1);
+      if (TARGET_HARD_FLOAT && TARGET_VFP_SINGLE)
+       arm_emit_eabi_attribute ("Tag_ABI_HardFP_use", 27, 1);
- if (TARGET_HARD_FLOAT_ABI)
-           arm_emit_eabi_attribute ("Tag_ABI_VFP_args", 28, 1);
-       }
+      if (TARGET_HARD_FLOAT_ABI)
+       arm_emit_eabi_attribute ("Tag_ABI_VFP_args", 28, 1);
/* Some of these attributes only apply when the corresponding features
         are used.  However we don't have any easy way of figuring this out.

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