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From: "steven at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/13767] [tree-ssa] ICE in verify_flow_info Date: Tue, 20 Jan 2004 11:11:00 -0000 [thread overview] Message-ID: <20040120111151.23799.qmail@sources.redhat.com> (raw) In-Reply-To: <20040120105417.13767.steven@gcc.gnu.org> ------- Additional Comments From steven at gcc dot gnu dot org 2004-01-20 11:11 ------- Another example of why GOTO's in the CFG suck ;-) The GOTO to L1 is redundant but it's not killed because it jumps to a nonlocal label. (gdb) p debug_tree_cfg (0) main () { static t; void L1 = <<< error >>>; int c.1; # BLOCK 0 # PRED: ENTRY (fallthru) c.1 = c; if (c.1 == 0) goto <L0>; else goto <L1>; # SUCC: 2 (false) 1 (true) # BLOCK 1 # PRED: 0 (true) <L0>:; goto L1; # SUCC: 2 (fallthru) # BLOCK 2 # PRED: 1 (fallthru) 0 (false) <L1>:; t (); # SUCC: 3 (fallthru) 4 (ab) # BLOCK 3 # PRED: 2 (fallthru) abort (); # SUCC: 4 (ab) # BLOCK 4 # PRED: ENTRY (ab) 3 (ab) 2 (ab) L1:; return 0; # SUCC: EXIT } -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13767
next prev parent reply other threads:[~2004-01-20 11:11 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2004-01-20 10:54 [Bug middle-end/13767] New: " steven at gcc dot gnu dot org 2004-01-20 11:11 ` steven at gcc dot gnu dot org [this message] 2004-01-20 11:21 ` [Bug middle-end/13767] " steven at gcc dot gnu dot org 2004-01-20 15:28 ` [Bug optimization/13767] " pinskia at gcc dot gnu dot org 2004-01-20 15:30 ` steven at gcc dot gnu dot org 2004-01-21 21:36 ` rth at gcc dot gnu dot org 2004-01-23 1:14 ` rth at gcc dot gnu dot org 2004-01-23 1:14 ` cvs-commit at gcc dot gnu dot org
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