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| author | Richard Henderson <rth@cygnus.com> | 2000-05-15 23:21:04 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-05-15 23:21:04 -0700 |
| commit | 7f9d9ea1ff544fd1ea3a510dbafddb2d0c95472c (patch) | |
| tree | 1b55b6444bd17bd7241a921e165045e73a41c3fe /gcc/ifcvt.c | |
| parent | 085ce8c6aceb12dbb1fb9ba9bec6c014d65f0445 (diff) | |
| download | gcc-7f9d9ea1ff544fd1ea3a510dbafddb2d0c95472c.zip gcc-7f9d9ea1ff544fd1ea3a510dbafddb2d0c95472c.tar.gz gcc-7f9d9ea1ff544fd1ea3a510dbafddb2d0c95472c.tar.bz2 | |
ifcvt.c (cond_exec_process_insns): Drop USE and CLOBBER insns that get in the way after reload.
* ifcvt.c (cond_exec_process_insns): Drop USE and CLOBBER insns
that get in the way after reload.
(cond_exec_process_if_block): Skip a label heading THEN block.
From-SVN: r33923
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index f4142e2..2403651 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -197,6 +197,19 @@ cond_exec_process_insns (start, end, test, prob_val, mod_ok) if (GET_CODE (insn) != INSN && GET_CODE (insn) != CALL_INSN) abort (); + /* Remove USE and CLOBBER insns that get in the way. */ + if (reload_completed + && (GET_CODE (PATTERN (insn)) == USE + || GET_CODE (PATTERN (insn)) == CLOBBER)) + { + /* ??? Ug. Actually unlinking the thing is problematic, + given what we'd have to coordinate with our callers. */ + PUT_CODE (insn, NOTE); + NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED; + NOTE_SOURCE_FILE (insn) = 0; + goto insn_done; + } + /* Last insn wasn't last? */ if (must_be_last) return FALSE; @@ -288,6 +301,10 @@ cond_exec_process_if_block (test_bb, then_bb, else_bb, join_bb) then_start = then_bb->head; then_end = then_bb->end; + /* Skip a label heading THEN block. */ + if (GET_CODE (then_start) == CODE_LABEL) + then_start = NEXT_INSN (then_start); + /* Skip a (use (const_int 0)) or branch as the final insn. */ if (GET_CODE (then_end) == INSN && GET_CODE (PATTERN (then_end)) == USE |