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| author | krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-09 16:27:15 +0000 |
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| committer | krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-09 16:27:15 +0000 |
| commit | 6d0afa28716e6b5b437e284572ca11057b350886 (patch) | |
| tree | 5a1189ff6ceb006e0e8f15ce88cec1110ea73702 /gcc/config/s390/s390.c | |
| parent | ebfb6092c087ec8946ca5a8a1b39b4ec68a82c37 (diff) | |
| download | gcc-6d0afa28716e6b5b437e284572ca11057b350886.tar.gz | |
2011-03-09 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* config/s390/s390-protos.h (s390_label_align): New prototype.
* config/s390/s390.c (s390_label_align): New function.
* config/s390/s390.h (LABEL_ALIGN): New target macro definition.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170821 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/s390/s390.c')
| -rw-r--r-- | gcc/config/s390/s390.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index 3e6edb76b47..54632ddf9d6 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -384,6 +384,32 @@ struct GTY(()) machine_function bytes on a z10 (or higher) CPU. */ #define PREDICT_DISTANCE (TARGET_Z10 ? 384 : 2048) +/* Return the alignment for LABEL. We default to the -falign-labels + value except for the literal pool base label. */ +int +s390_label_align (rtx label) +{ + rtx prev_insn = prev_active_insn (label); + + if (prev_insn == NULL_RTX) + goto old; + + prev_insn = single_set (prev_insn); + + if (prev_insn == NULL_RTX) + goto old; + + prev_insn = SET_SRC (prev_insn); + + /* Don't align literal pool base labels. */ + if (GET_CODE (prev_insn) == UNSPEC + && XINT (prev_insn, 1) == UNSPEC_MAIN_BASE) + return 0; + + old: + return align_labels_log; +} + static enum machine_mode s390_libgcc_cmp_return_mode (void) { |