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| author | Jakub Jelinek <jakub@redhat.com> | 2001-11-09 00:14:26 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2001-11-09 00:14:26 +0100 |
| commit | 89753b3a903366fb53a324206a176d53d04d419e (patch) | |
| tree | 5b75760913631d837f1b6ed90a10cb8f7df5a438 /gcc | |
| parent | 6608bd4de4b52a0519329caa878375641dbe9756 (diff) | |
| download | gcc-89753b3a903366fb53a324206a176d53d04d419e.zip gcc-89753b3a903366fb53a324206a176d53d04d419e.tar.gz gcc-89753b3a903366fb53a324206a176d53d04d419e.tar.bz2 | |
cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns which cannot throw.
* cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns
which cannot throw.
From-SVN: r46863
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cfgrtl.c | 13 |
2 files changed, 17 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 06fa1f6..6535209 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-11-09 Jakub Jelinek <jakub@redhat.com> + + * cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns + which cannot throw. + Thu Nov 8 18:00:55 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> * explow.c (convert_memory_address, case SUBREG): Only return diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c index 2987a50..5d785ca 100644 --- a/gcc/cfgrtl.c +++ b/gcc/cfgrtl.c @@ -1819,7 +1819,7 @@ purge_dead_edges (bb) basic_block bb; { edge e, next; - rtx insn = bb->end; + rtx insn = bb->end, note; bool purged = false; if (GET_CODE (insn) == JUMP_INSN && !simplejump_p (insn)) @@ -1878,6 +1878,17 @@ purge_dead_edges (bb) return purged; } + /* If this instruction cannot trap, remove REG_EH_REGION notes. */ + if (GET_CODE (insn) == INSN + && (note = find_reg_note (insn, REG_EH_REGION, NULL))) + { + rtx eqnote; + if (! may_trap_p (PATTERN (insn)) + || ((eqnote = find_reg_equal_equiv_note (insn)) + && ! may_trap_p (XEXP (eqnote, 0)))) + remove_note (insn, note); + } + /* Cleanup abnormal edges caused by throwing insns that have been eliminated. */ if (! can_throw_internal (bb->end)) |