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From: "regehr at cs dot utah.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/58364] New: likely wrong code bug
Date: Sun, 08 Sep 2013 19:43:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 4.9.0
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X-Bugzilla-Who: regehr at cs dot utah.edu
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X-Bugzilla-Priority: P3
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58364

            Bug ID: 58364
           Summary: likely wrong code bug
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: regehr at cs dot utah.edu
                CC: chenyang at cs dot utah.edu

regehr@john-home ~/z/reduce/r107 $ gcc -O0 small.c ; ./a.out
regehr@john-home ~/z/reduce/r107 $ gcc -O1 small.c ; ./a.out
x
regehr@john-home ~/z/reduce/r107 $ cat small.c
int printf(const char *, ...);

int x3 (int x4) { 
  return x4 < 0 ? 1 : x4; 
}

int x0 = 1, x1, x2;

int main (void) {
  if (x3(x0 > x2 == (x1 = 0))) {
    printf("x\n");
  }
  return 0;
}
regehr@john-home ~/z/reduce/r107 $ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/regehr/z/compiler-install/gcc-r202341-install/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/regehr/z/compiler-source/gcc/configure
--prefix=/home/regehr/z/compiler-install/gcc-r202341-install
--enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 4.9.0 20130906 (experimental) (GCC)