diff options
| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-11-08 23:14:26 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-11-08 23:14:26 +0000 |
| commit | 4a33fae653ecef6544b5da8f6b1e3d2206b9291f (patch) | |
| tree | 5b75760913631d837f1b6ed90a10cb8f7df5a438 /gcc/cfgrtl.c | |
| parent | 648818ad87fd45e64ccf62b2d9f63e90b18ad19c (diff) | |
| download | gcc-4a33fae653ecef6544b5da8f6b1e3d2206b9291f.tar.gz | |
* cfgrtl.c (purge_dead_edges): Remove REG_EH_REGION note for insns
which cannot throw.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46863 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cfgrtl.c')
| -rw-r--r-- | gcc/cfgrtl.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c index 2987a506618..5d785cafb50 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)) |