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| author | Bernd Schmidt <bernd.schmidt@analog.com> | 2007-05-09 11:57:49 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2007-05-09 11:57:49 +0000 |
| commit | 520c62adcda2977418be8c7163d413549f5e7e3d (patch) | |
| tree | 72aeffb5e3021c4efe73693261c02bf5e915025f /gcc | |
| parent | 0416068158e46ca20a07a30f4e19c43715f103ea (diff) | |
| download | gcc-520c62adcda2977418be8c7163d413549f5e7e3d.zip gcc-520c62adcda2977418be8c7163d413549f5e7e3d.tar.gz gcc-520c62adcda2977418be8c7163d413549f5e7e3d.tar.bz2 | |
bfin.h (LOCAL_ALIGNMENT): Define.
* config/bfin/bfin.h (LOCAL_ALIGNMENT): Define.
* config/bfin/bfin.c (bfin_local_alignment): New function.
* config/bfin/bfin-protos.h (bfin_local_alignment): Declare it.
From-SVN: r124570
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/bfin/bfin-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/bfin/bfin.c | 18 | ||||
| -rw-r--r-- | gcc/config/bfin/bfin.h | 12 |
4 files changed, 37 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4c7ba63..a5b1469 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2007-05-08 Bernd Schmidt <bernd.schmidt@analog.com> + + * config/bfin/bfin.h (LOCAL_ALIGNMENT): Define. + * config/bfin/bfin.c (bfin_local_alignment): New function. + * config/bfin/bfin-protos.h (bfin_local_alignment): Declare it. + 2007-05-08 Chao-ying Fu <fu@mips.com> * doc/md.texi (msub@var{m}@var{n}4, usub@var{m}@var{n}4): Document. diff --git a/gcc/config/bfin/bfin-protos.h b/gcc/config/bfin/bfin-protos.h index 9495530..525ecd32 100644 --- a/gcc/config/bfin/bfin-protos.h +++ b/gcc/config/bfin/bfin-protos.h @@ -86,6 +86,7 @@ extern void override_options (void); extern void asm_conditional_branch (rtx, rtx *, int, int); extern rtx bfin_gen_compare (rtx, Mmode); +extern int bfin_local_alignment (tree, int); extern int bfin_return_in_memory (tree); extern void initialize_trampoline (rtx, rtx, rtx); extern bool bfin_legitimate_address_p (Mmode, rtx, int); diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c index a91e488..94849ce 100644 --- a/gcc/config/bfin/bfin.c +++ b/gcc/config/bfin/bfin.c @@ -3045,6 +3045,24 @@ bfin_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp) return false; } +/* Compute the alignment for a local variable. + TYPE is the data type, and ALIGN is the alignment that + the object would ordinarily have. The value of this macro is used + instead of that alignment to align the object. */ + +int +bfin_local_alignment (tree type, int align) +{ + /* Increasing alignment for (relatively) big types allows the builtin + memcpy can use 32 bit loads/stores. */ + if (TYPE_SIZE (type) + && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST + && (TREE_INT_CST_LOW (TYPE_SIZE (type)) > 8 + || TREE_INT_CST_HIGH (TYPE_SIZE (type))) && align < 32) + return 32; + return align; +} + /* Implement TARGET_SCHED_ISSUE_RATE. */ static int diff --git a/gcc/config/bfin/bfin.h b/gcc/config/bfin/bfin.h index c2e75b2..5a779da 100644 --- a/gcc/config/bfin/bfin.h +++ b/gcc/config/bfin/bfin.h @@ -227,6 +227,18 @@ extern const char *bfin_library_id_string; /*#define DATA_ALIGNMENT(TYPE, BASIC-ALIGN) for arrays.. */ +/* If defined, a C expression to compute the alignment for a local + variable. TYPE is the data type, and ALIGN is the alignment that + the object would ordinarily have. The value of this macro is used + instead of that alignment to align the object. + + If this macro is not defined, then ALIGN is used. + + One use of this macro is to increase alignment of medium-size + data to make it all fit in fewer cache lines. */ + +#define LOCAL_ALIGNMENT(TYPE, ALIGN) bfin_local_alignment ((TYPE), (ALIGN)) + /* Make strings word-aligned so strcpy from constants will be faster. */ #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ (TREE_CODE (EXP) == STRING_CST \ |