This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/43056] __builtin_prefetch causes ICE: in rtl_verify_flow_info, at cfgrtl.c:2205 with -fsched2-use-superblocks
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Feb 2010 23:18:09 -0000
- Subject: [Bug rtl-optimization/43056] __builtin_prefetch causes ICE: in rtl_verify_flow_info, at cfgrtl.c:2205 with -fsched2-use-superblocks
- References: <bug-43056-14164@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from steven at gcc dot gnu dot org 2010-02-13 23:18 -------
Breakpoint 7, rest_of_handle_sched2 () at ../../trunk/gcc/sched-rgn.c:3534
3534 && ! maybe_skip_selective_scheduling ())
(gdb) p brief_dump_cfg(stderr)
Basic block 2 (reachable, rtl)
Predecessors: ENTRY [100.0%] (fallthru)
Successors: EXIT [100.0%]
The .split4 dump (just before .sched2):
;; Function foo (foo)
1 NOTE_INSN_DELETED
3 NOTE_INSN_BASIC_BLOCK
9 NOTE_INSN_PROLOGUE_END
2 NOTE_INSN_FUNCTION_BEG
5 prefetch(`x',0x0,0x3)
10 NOTE_INSN_EPILOGUE_BEG
11 return
i 12: barrier
8 NOTE_INSN_DELETED
And the .sched2 dump:
changing bb of uid 13
unscanned insn
changing bb of uid 5
from 2 to 3
deleting block 3
1 NOTE_INSN_DELETED
3 NOTE_INSN_BASIC_BLOCK
9 NOTE_INSN_PROLOGUE_END
2 NOTE_INSN_FUNCTION_BEG
14 NOTE_INSN_EPILOGUE_BEG
11 return
8 NOTE_INSN_DELETED
What insn 13? What basic block 3?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43056