diff options
| author | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-04-24 19:17:22 +0000 |
|---|---|---|
| committer | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-04-24 19:17:22 +0000 |
| commit | d9f9327b8c6432820044bc19bc99e02e9afec1da (patch) | |
| tree | edc788c944585b9435559cc119e7c3684c111ac9 /gcc/reload1.c | |
| parent | 022ea294da39a09fa2157b830de3bbbe3044eff2 (diff) | |
| download | gcc-d9f9327b8c6432820044bc19bc99e02e9afec1da.tar.gz | |
2007-04-24 Hui-May Chang <hm.chang@apple.com>
* reload1.c (merge_assigned_reloads) : Do not merge a RELOAD_OTHER
instruction with a RELOAD_FOR_OPERAND_ADDRESS instruction.
* gcc.target/i386/reload-1.c. New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@124115 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index f29f0799140..9ee046ae1ec 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -6323,15 +6323,23 @@ merge_assigned_reloads (rtx insn) transfer_replacements (i, j); } - /* If this is now RELOAD_OTHER, look for any reloads that load - parts of this operand and set them to RELOAD_FOR_OTHER_ADDRESS - if they were for inputs, RELOAD_OTHER for outputs. Note that - this test is equivalent to looking for reloads for this operand - number. */ - /* We must take special care with RELOAD_FOR_OUTPUT_ADDRESS; it may - share registers with a RELOAD_FOR_INPUT, so we can not change it - to RELOAD_FOR_OTHER_ADDRESS. We should never need to, since we - do not modify RELOAD_FOR_OUTPUT. */ + /* If this is now RELOAD_OTHER, look for any reloads that + load parts of this operand and set them to + RELOAD_FOR_OTHER_ADDRESS if they were for inputs, + RELOAD_OTHER for outputs. Note that this test is + equivalent to looking for reloads for this operand + number. + + We must take special care with RELOAD_FOR_OUTPUT_ADDRESS; + it may share registers with a RELOAD_FOR_INPUT, so we can + not change it to RELOAD_FOR_OTHER_ADDRESS. We should + never need to, since we do not modify RELOAD_FOR_OUTPUT. + + It is possible that the RELOAD_FOR_OPERAND_ADDRESS + instruction is assigned the same register as the earlier + RELOAD_FOR_OTHER_ADDRESS instruction. Merging these two + instructions will cause the RELOAD_FOR_OTHER_ADDRESS + instruction to be deleted later on. */ if (rld[i].when_needed == RELOAD_OTHER) for (j = 0; j < n_reloads; j++) @@ -6339,6 +6347,7 @@ merge_assigned_reloads (rtx insn) && rld[j].when_needed != RELOAD_OTHER && rld[j].when_needed != RELOAD_FOR_OTHER_ADDRESS && rld[j].when_needed != RELOAD_FOR_OUTPUT_ADDRESS + && rld[j].when_needed != RELOAD_FOR_OPERAND_ADDRESS && (! conflicting_input || rld[j].when_needed == RELOAD_FOR_INPUT_ADDRESS || rld[j].when_needed == RELOAD_FOR_INPADDR_ADDRESS) |