On Thu, Jul 9, 2015 at 12:53 AM, H.J. Lu <hongjiu...@intel.com> wrote:
> attribute ((aligned)) should align to the minimum of BIGGEST_ALIGNMENT,
> which is 4 bytes for -miamcu.
>
> Tested on Linux/x86-64. OK for trunk?
>
> Thanks.
>
> H.J.
> ---
> gcc/
>
> PR target/66818
> * config/i386/i386.h (ATTRIBUTE_ALIGNED_VALUE): Defined to 32
> for IA MCU.
>
> gcc/testsuite/
>
> PR target/66818
> * gcc.target/i386/pr66818.c: New test.
OK.
Thanks,
Uros.
> ---
> gcc/config/i386/i386.h | 2 +-
> gcc/testsuite/gcc.target/i386/pr66818.c | 5 +++++
> 2 files changed, 6 insertions(+), 1 deletion(-)
> create mode 100644 gcc/testsuite/gcc.target/i386/pr66818.c
>
> diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
> index f357e79..74334ff 100644
> --- a/gcc/config/i386/i386.h
> +++ b/gcc/config/i386/i386.h
> @@ -811,7 +811,7 @@ extern const char *host_detect_local_cpu (int argc, const
> char **argv);
>
> /* Alignment value for attribute ((aligned)). It is a constant since
> it is the part of the ABI. We shouldn't change it with -mavx. */
> -#define ATTRIBUTE_ALIGNED_VALUE 128
> +#define ATTRIBUTE_ALIGNED_VALUE (TARGET_IAMCU ? 32 : 128)
>
> /* Decide whether a variable of mode MODE should be 128 bit aligned. */
> #define ALIGN_MODE_128(MODE) \
> diff --git a/gcc/testsuite/gcc.target/i386/pr66818.c
> b/gcc/testsuite/gcc.target/i386/pr66818.c
> new file mode 100644
> index 0000000..d90394c
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/i386/pr66818.c
> @@ -0,0 +1,5 @@
> +/* { dg-do compile { target ia32 } } */
> +/* { dg-options "-O2 -mno-sse -mno-mmx -miamcu" } */
> +
> +struct dummy { int x __attribute__((aligned)); };
> +int array[__alignof__(struct dummy) == 4 ? 1 : -1];
> --
> 2.4.3
>
