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| author | Andy Hutchinson <hutchinsonandy@gcc.gnu.org> | 2009-11-12 02:35:49 +0000 |
|---|---|---|
| committer | Andy Hutchinson <hutchinsonandy@gcc.gnu.org> | 2009-11-12 02:35:49 +0000 |
| commit | ae761c4536548e9bfa0619430726b249d732279d (patch) | |
| tree | 0adde9e7a3206137a3a0b73acd97affa373a4628 /gcc/cfgexpand.c | |
| parent | 50b4d31c59815411ea5230dfcb610b2448de022b (diff) | |
| download | gcc-ae761c4536548e9bfa0619430726b249d732279d.tar.gz | |
re PR middle-end/41440 (SEG FAULT in CSE.C caused by bad RTL expansion)
PR middle-end/41440
* cfgexpand.c (expand_gimple_basic_block): Append NOP to a fallthru,
single successor block, ending with jump created by RTL expander.
From-SVN: r154112
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index cfb4d17dc20..c9e1f1a3d73 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -3220,6 +3220,18 @@ expand_gimple_basic_block (basic_block bb) } } + /* Expanded RTL can create a jump in the last instruction of block. + This later might be assumed to be a jump to successor and break edge insertion. + We need to insert dummy move to prevent this. PR41440. */ + if (single_succ_p (bb) + && (single_succ_edge (bb)->flags & EDGE_FALLTHRU) + && (last = get_last_insn ()) + && JUMP_P (last)) + { + rtx dummy = gen_reg_rtx (SImode); + emit_insn_after_noloc (gen_move_insn (dummy, dummy), last, NULL); + } + do_pending_stack_adjust (); /* Find the block tail. The last insn in the block is the insn |