[Bug target/59794] [4.7/4.8 Regression] i386 backend fails to detect MMX/SSE/AVX ABI changes

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59794

--- Comment #11 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Fri Jan 17 18:51:27 2014
New Revision: 206727

URL: http://gcc.gnu.org/viewcvs?rev=206727&root=gcc&view=rev
Log:
Consolidate ABI warning into type_natural_mode

gcc/

    Backport from mainline
    PR target/59794
    * config/i386/i386.c (type_natural_mode): Add a bool parameter
    to indicate if type is used for function return value.  Warn
    ABI change if the vector mode isn't available for function
    return value.
    (ix86_function_arg_advance): Pass false to type_natural_mode.
    (ix86_function_arg): Likewise.
    (ix86_gimplify_va_arg): Likewise.
    (function_arg_32): Don't warn ABI change.
    (ix86_function_value): Pass true to type_natural_mode.
    (ix86_return_in_memory): Likewise.
    (ix86_struct_value_rtx): Removed.
    (TARGET_STRUCT_VALUE_RTX): Likewise.

gcc/testsuite/

    Backport from mainline
    PR target/59794
    * gcc.target/i386/pr39162.c (y): New __m256i variable.
    (bar): Change return type to void.  Set y to x.
    * gcc.target/i386/pr59794-1.c: New testcase.
    * gcc.target/i386/pr59794-2.c: Likewise.
    * gcc.target/i386/pr59794-3.c: Likewise.
    * gcc.target/i386/pr59794-4.c: Likewise.
    * gcc.target/i386/pr59794-5.c: Likewise.
    * gcc.target/i386/pr59794-6.c: Likewise.
    * gcc.target/i386/pr59794-7.c: Likewise.

Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/config/i386/i386.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/gcc.target/i386/pr39162.c