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| author | Jim Wilson <wilson@gcc.gnu.org> | 1993-09-01 16:20:32 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1993-09-01 16:20:32 -0700 |
| commit | e26a82e41e15d154c070a49bc4afae630eeeae1f (patch) | |
| tree | 89803a1860f9e3acc2fcf4ca180e7e563fa5d2d1 /gcc/jump.c | |
| parent | 549a367ad6bf68e95e6c08fe9fb49a29a4e92177 (diff) | |
| download | gcc-e26a82e41e15d154c070a49bc4afae630eeeae1f.tar.gz | |
(jump_optimize): When optimize conditional jump around
unconditional jump, handle case where prev_label can be zero.
From-SVN: r5246
Diffstat (limited to 'gcc/jump.c')
| -rw-r--r-- | gcc/jump.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/jump.c b/gcc/jump.c index 4025d8bbb21..229cd8602a2 100644 --- a/gcc/jump.c +++ b/gcc/jump.c @@ -1642,7 +1642,8 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan) rtx prev_uses = prev_nonnote_insn (reallabelprev); rtx prev_label = JUMP_LABEL (insn); - ++LABEL_NUSES (prev_label); + if (prev_label) + ++LABEL_NUSES (prev_label); if (invert_jump (insn, JUMP_LABEL (reallabelprev))) { @@ -1671,7 +1672,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan) /* We can now safely delete the label if it is unreferenced since the delete_insn above has deleted the BARRIER. */ - if (--LABEL_NUSES (prev_label) == 0) + if (prev_label && --LABEL_NUSES (prev_label) == 0) delete_insn (prev_label); continue; } |