diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-11-17 13:02:31 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-11-17 13:02:31 +0000 |
| commit | fc2596c8b958ac6626601b8dd7e5ba25fc64f006 (patch) | |
| tree | 1e89d1229ecf0cb5ad8729761520910b3d4127b2 /gcc/combine.c | |
| parent | 0e0023ea90f853550206854d1c71a923bcc91fa2 (diff) | |
| download | gcc-fc2596c8b958ac6626601b8dd7e5ba25fc64f006.tar.gz | |
PR rtl-optimization/46440
* combine.c (update_cfg_for_uncondjump): When changing
an indirect jump into unconditional jump, remove BARRIERs
from bb's footer.
* gcc.dg/pr46440.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166867 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index d55ce3127d8..c557e8c65c8 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2460,7 +2460,25 @@ update_cfg_for_uncondjump (rtx insn) delete_insn (insn); if (at_end && EDGE_COUNT (bb->succs) == 1) - single_succ_edge (bb)->flags |= EDGE_FALLTHRU; + { + rtx insn; + + single_succ_edge (bb)->flags |= EDGE_FALLTHRU; + + /* Remove barriers from the footer if there are any. */ + for (insn = bb->il.rtl->footer; insn; insn = NEXT_INSN (insn)) + if (BARRIER_P (insn)) + { + if (PREV_INSN (insn)) + NEXT_INSN (PREV_INSN (insn)) = NEXT_INSN (insn); + else + bb->il.rtl->footer = NEXT_INSN (insn); + if (NEXT_INSN (insn)) + PREV_INSN (NEXT_INSN (insn)) = PREV_INSN (insn); + } + else if (LABEL_P (insn)) + break; + } } /* Try to combine the insns I0, I1 and I2 into I3. |