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| author | Jeff Law <law@gcc.gnu.org> | 1993-09-30 21:23:10 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1993-09-30 21:23:10 -0600 |
| commit | 0e5bad531b3ab78b6a4fd88e80db6232fe460107 (patch) | |
| tree | d5ee58bbeee6d229a3cec1a73ff8484f6755b2d4 | |
| parent | 56ae2659f7473989e070ba6857cb5fdd8bf3958e (diff) | |
| download | gcc-0e5bad531b3ab78b6a4fd88e80db6232fe460107.zip gcc-0e5bad531b3ab78b6a4fd88e80db6232fe460107.tar.gz gcc-0e5bad531b3ab78b6a4fd88e80db6232fe460107.tar.bz2 | |
reorg.c (optimize_skip): Do not thread a jump to a new target if doing so would invalidate the insn in...
* reorg.c (optimize_skip): Do not thread a jump to a new
target if doing so would invalidate the insn in the jump's
delay slot.
From-SVN: r5540
| -rw-r--r-- | gcc/reorg.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/reorg.c b/gcc/reorg.c index 341383d..547cba9 100644 --- a/gcc/reorg.c +++ b/gcc/reorg.c @@ -1157,7 +1157,14 @@ optimize_skip (insn) target_label = JUMP_LABEL (next_trial); if (target_label == 0) target_label = find_end_label (); - reorg_redirect_jump (insn, target_label); + + /* Recompute the flags based on TARGET_LABEL since threading + the jump to TARGET_LABEL may change the direction of the + jump (which may change the circumstances in which the + delay slot is nullified). */ + flags = get_jump_flags (insn, target_label); + if (eligible_for_annul_true (insn, 0, trial, flags)) + reorg_redirect_jump (insn, target_label); } INSN_ANNULLED_BRANCH_P (insn) = 1; |