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From: "kazu at cs dot umass dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug optimization/15347] New: [tree-ssa] fold if ("<12ers" + 1 == 0).
Date: Sun, 09 May 2004 19:25:00 -0000	[thread overview]
Message-ID: <20040509192540.15347.kazu@cs.umass.edu> (raw)

void bar ();

int
foo (void)
{
  if ("<12ers" + 1 == 0)
    bar ();
}

which is reduced from from

extern const char tree_code_type[];

extern char *strchr (__const char *__s, int __c) __attribute__ ((__pure__));

extern void abort (void) __attribute__ ((__noreturn__));

int
foo (int a)
{
  if (tree_code_type[a] == '1')
    if (strchr ("<12ers", tree_code_type[a]) == 0)
      abort ();
}

which is in turn reduced from find_base_decl() in alias.c.

-- 
           Summary: [tree-ssa] fold if ("<12ers" + 1 == 0).
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Keywords: pessimizes-code
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at cs dot umass dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15347


             reply	other threads:[~2004-05-09 19:25 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-05-09 19:25 kazu at cs dot umass dot edu [this message]
2004-05-09 19:41 ` [Bug optimization/15347] " pinskia at gcc dot gnu dot org
2004-05-09 20:15 ` kazu at cs dot umass dot edu
2004-05-09 20:22 ` kazu at cs dot umass dot edu
2004-05-24 22:29 ` [Bug tree-optimization/15347] " pinskia at gcc dot gnu dot org
2004-06-01  6:45 ` kazu at cs dot umass dot edu
2004-06-01  6:48 ` kazu at cs dot umass dot edu
2004-06-03 23:22 ` pinskia at gcc dot gnu dot org

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