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| author | Jakub Jelinek <jakub@redhat.com> | 2009-07-11 19:40:29 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2009-07-11 19:40:29 +0200 |
| commit | ae58e548884f696e600966549867df23de3ff2d3 (patch) | |
| tree | f7d7a64b4ca810edf1a746863dde1086ecd8cbd9 /gcc/doc | |
| parent | dd67163fa487933aff300fd75228b6889c9c6f6e (diff) | |
| download | gcc-ae58e548884f696e600966549867df23de3ff2d3.zip gcc-ae58e548884f696e600966549867df23de3ff2d3.tar.gz gcc-ae58e548884f696e600966549867df23de3ff2d3.tar.bz2 | |
re PR target/40667 (stack frames are generated even with -fomit-frame-pointer)
PR rtl-optimization/40667
* defaults.h (MINIMUM_ALIGNMENT): Define if not defined.
* doc/tm.texi (MINIMUM_ALIGNMENT): Document it.
* config/i386/i386.h (MINIMUM_ALIGNMENT): Define.
* config/i386/i386.c (ix86_minimum_alignment): New function.
* config/i386/i386-protos.h (ix86_minimum_alignment): New prototype.
* cfgexpand.c (expand_one_var): Use MINIMIM_ALIGNMENT.
* emit-rtl.c (gen_reg_rtx): Likewise.
* function.c (assign_parms): Likewise. If nominal_type needs
bigger alignment than FUNCTION_ARG_BOUNDARY, use its alignment
rather than passed_type's alignment.
From-SVN: r149513
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tm.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index e328210..41ed031 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1227,6 +1227,14 @@ One use of this macro is to increase alignment of medium-size data to make it all fit in fewer cache lines. @end defmac +@defmac MINIMUM_ALIGNMENT (@var{exp}, @var{mode}, @var{align}) +If defined, a C expression to compute the minimum required alignment +for dynamic stack realignment purposes for @var{exp} (a type or decl), +@var{mode}, assuming normal alignment @var{align}. + +If this macro is not defined, then @var{align} will be used. +@end defmac + @defmac EMPTY_FIELD_BOUNDARY Alignment in bits to be given to a structure bit-field that follows an empty field such as @code{int : 0;}. |