On Thu, Sep 28, 2017 at 3:08 PM, Shalnov, Sergey
<sergey.shal...@intel.com> wrote:
> Hi,
> GCC uses full 512-bit register to return the constant from the function.
> The patch avoid 512-bit register usage if "-mprefer-avx256" option used.
>
> 2017-09-28 Sergey Shalnov <sergey.shal...@intel.com>
>
> gcc/
> * config/i386/i386.md(*movsf_internal, *movdf_internal):
> Return 256-bit AVX modes for TARGET_PREFER_AVX256.
>
> gcc/testsuite/
> * gcc.target/i386/avx512f-constant-float-return.c: New test.
>
- (match_test "TARGET_AVX512F")
+ (match_test "TARGET_AVX512F && !TARGET_PREFER_AVX256")
Please use
(and (match_test "TARGET_AVX512F)
(not (match_test "TARGET_PREFER_AVX256)))
Uros.
