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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/52086] New: [4.7 Regression] ICE caused by wrong peephole2 for QImode mem += reg followed by test
Date: Wed, 01 Feb 2012 21:56:00 -0000	[thread overview]
Message-ID: <bug-52086-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52086

             Bug #: 52086
           Summary: [4.7 Regression] ICE caused by wrong peephole2 for
                    QImode mem += reg followed by test
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: jakub@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org
            Target: i?86-linux


/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-additional-options "-fpic" { target fpic } } */

struct S { char a; char b[100]; };
int bar (void);
int baz (int);

void
foo (struct S *x)
{
  if (bar () & 1)
    {
      char c = bar ();
      baz (4);
      x->a += c;
      while (x->a)
        x->b[c] = bar ();
    }
}

ICEs on i?86-linux (and x86_64-linux -m32) starting with:
http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179646


             reply	other threads:[~2012-02-01 21:56 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-01 21:56 jakub at gcc dot gnu.org [this message]
2012-02-01 21:56 ` [Bug target/52086] " jakub at gcc dot gnu.org
2012-02-01 22:01 ` jakub at gcc dot gnu.org
2012-02-02  9:05 ` jakub at gcc dot gnu.org
2012-02-02  9:16 ` jakub at gcc dot gnu.org

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