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| author | Jakub Jelinek <jakub@redhat.com> | 2013-06-10 17:41:52 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2013-06-10 17:41:52 +0200 |
| commit | df8a1d28a50fe32dc87f989ba0a72f00227a38ec (patch) | |
| tree | 7f5e2fcbb34a0e22a4e842599006ba571e4aad8d /gcc/doc/tm.texi | |
| parent | 57b29ca675a87d5dd79371925f19f945990a2bea (diff) | |
| download | gcc-df8a1d28a50fe32dc87f989ba0a72f00227a38ec.zip gcc-df8a1d28a50fe32dc87f989ba0a72f00227a38ec.tar.gz gcc-df8a1d28a50fe32dc87f989ba0a72f00227a38ec.tar.bz2 | |
re PR target/56564 (movdqa on possibly-8-byte-aligned struct with -O3)
PR target/56564
* varasm.c (align_variable): Don't use DATA_ALIGNMENT or
CONSTANT_ALIGNMENT if !decl_binds_to_current_def_p (decl).
Use DATA_ABI_ALIGNMENT for that case instead if defined.
(get_variable_align): New function.
(get_variable_section, emit_bss, emit_common,
assemble_variable_contents, place_block_symbol): Use
get_variable_align instead of DECL_ALIGN.
(assemble_noswitch_variable): Add align argument, use it
instead of DECL_ALIGN.
(assemble_variable): Adjust caller. Use get_variable_align
instead of DECL_ALIGN.
* config/i386/i386.h (DATA_ALIGNMENT): Adjust x86_data_alignment
caller.
(DATA_ABI_ALIGNMENT): Define.
* config/i386/i386-protos.h (x86_data_alignment): Adjust prototype.
* config/i386/i386.c (x86_data_alignment): Add opt argument. If
opt is false, only return the psABI mandated alignment increase.
* config/c6x/c6x.h (DATA_ALIGNMENT): Renamed to...
(DATA_ABI_ALIGNMENT): ... this.
* config/mmix/mmix.h (DATA_ALIGNMENT): Renamed to...
(DATA_ABI_ALIGNMENT): ... this.
* config/mmix/mmix.c (mmix_data_alignment): Adjust function comment.
* config/s390/s390.h (DATA_ALIGNMENT): Renamed to...
(DATA_ABI_ALIGNMENT): ... this.
* doc/tm.texi.in (DATA_ABI_ALIGNMENT): Document.
* doc/tm.texi: Regenerated.
* gcc.target/i386/pr56564-1.c: New test.
* gcc.target/i386/pr56564-2.c: New test.
* gcc.target/i386/pr56564-3.c: New test.
* gcc.target/i386/pr56564-4.c: New test.
* gcc.target/i386/avx256-unaligned-load-4.c: Add -fno-common.
* gcc.target/i386/avx256-unaligned-store-1.c: Likewise.
* gcc.target/i386/avx256-unaligned-store-3.c: Likewise.
* gcc.target/i386/avx256-unaligned-store-4.c: Likewise.
* gcc.target/i386/vect-sizes-1.c: Likewise.
* gcc.target/i386/memcpy-1.c: Likewise.
* gcc.dg/vect/costmodel/i386/costmodel-vect-31.c (tmp): Initialize.
* gcc.dg/vect/costmodel/x86_64/costmodel-vect-31.c (tmp): Likewise.
From-SVN: r199898
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index f840481..f030b56 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1078,6 +1078,15 @@ arrays to be word-aligned so that @code{strcpy} calls that copy constants to character arrays can be done inline. @end defmac +@defmac DATA_ABI_ALIGNMENT (@var{type}, @var{basic-align}) +Similar to @code{DATA_ALIGNMENT}, but for the cases where the ABI mandates +some alignment increase, instead of optimization only purposes. E.g.@ +AMD x86-64 psABI says that variables with array type larger than 15 bytes +must be aligned to 16 byte boundaries. + +If this macro is not defined, then @var{basic-align} is used. +@end defmac + @defmac CONSTANT_ALIGNMENT (@var{constant}, @var{basic-align}) If defined, a C expression to compute the alignment given to a constant that is being placed in memory. @var{constant} is the constant and |