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| author | Kai Tietz <ktietz@gcc.gnu.org> | 2009-09-20 11:22:11 +0200 |
|---|---|---|
| committer | Kai Tietz <ktietz@gcc.gnu.org> | 2009-09-20 11:22:11 +0200 |
| commit | 63c6c7e070b9c79d0a797ed50fa90c8f1d35480d (patch) | |
| tree | c3683f21b52e4c4bfad4e1cad30f679a4f171041 /gcc/combine.c | |
| parent | ed6d9a1b9bcd377da8fe8fadae73f316536f2160 (diff) | |
| download | gcc-63c6c7e070b9c79d0a797ed50fa90c8f1d35480d.zip gcc-63c6c7e070b9c79d0a797ed50fa90c8f1d35480d.tar.gz gcc-63c6c7e070b9c79d0a797ed50fa90c8f1d35480d.tar.bz2 | |
[multiple changes]
2009-09-20 Paolo Bonzini <bonzini@gnu.org>
PR/39886
* combine.c (update_cfg_for_uncondjump): Set EDGE_FALLTHRU
just when insn is equal to BB_END (bb).
2009-09-20 Kai Tietz <kai.tietz@onevision.com>
* gcc.c-tortue/compile/pr39886.c: New.
From-SVN: r151895
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 6b507c2..35ab576 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2363,7 +2363,7 @@ propagate_for_debug (rtx insn, rtx last, rtx dest, rtx src, bool move) } } -/* Delete the conditional jump INSN and adjust the CFG correspondingly. +/* Delete the unconditional jump INSN and adjust the CFG correspondingly. Note that the INSN should be deleted *after* removing dead edges, so that the kept edge is the fallthrough edge for a (set (pc) (pc)) but not for a (set (pc) (label_ref FOO)). */ @@ -2372,12 +2372,13 @@ static void update_cfg_for_uncondjump (rtx insn) { basic_block bb = BLOCK_FOR_INSN (insn); + bool at_end = (BB_END (bb) == insn); - if (BB_END (bb) == insn) + if (at_end) purge_dead_edges (bb); delete_insn (insn); - if (EDGE_COUNT (bb->succs) == 1) + if (at_end && EDGE_COUNT (bb->succs) == 1) single_succ_edge (bb)->flags |= EDGE_FALLTHRU; } |