[committed 02/22] arm: testsuite: correctly detect hard_float

[Christophe Lyon]

Hi Richard,


On Mon, 13 Nov 2023 at 15:27, Richard Earnshaw <rearnsha@arm.com> wrote:
>
>
> Add an arm-specific test to check_effective_target_hard_float for
> Arm to handle cases where we only have single-precision FP in hardware.
>
> gcc/testsuite:
>
>         * lib/target-supports.exp (check_effective_target_hard_float): Add
>         arm-specific test.
> ---
>  gcc/testsuite/lib/target-supports.exp | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>

Our CI has detected a problem when testing this patch for cortex-m33:
with -mthumb/-march=armv8-m.main+dsp+fp/-mtune=cortex-m33/-mfloat-abi=hard/-mfpu=auto
and GCC configured with --disable-multilib --with-mode=thumb
--with-cpu=cortex-m33 --with-float=hard

FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O0  execution test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O1  execution test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O2  execution test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution
test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -O3 -g  execution test
FAIL: gcc:gcc.dg/torture/dg-torture.exp=gcc.dg/torture/fp-double-convert-float-1.c
  -Os  execution test

We use qemu for testing. Do these tests pass in your configuration?

Thanks,

Christophe