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From: "julia.koval at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/66821] New: reassoc-37.c fails on -march=pentium
Date: Thu, 09 Jul 2015 09:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66821

            Bug ID: 66821
           Summary: reassoc-37.c fails on -march=pentium
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: julia.koval at intel dot com
  Target Milestone: ---

FAIL: gcc.dg/tree-ssa/reassoc-37.c scan-tree-dump optimized
"(8784908|0x0*860c0c)"
FAIL: gcc.dg/tree-ssa/reassoc-37.c scan-tree-dump optimized "(<<|>>)"

./gcc -m32 reassoc-37.c
193.t.optimised pass generates:
  <bb 2>:
  _26 = (unsigned int) x_2(D);
  if (_26 > 23)
    goto <bb 4>;
  else
    goto <bb 3>;

  <bb 3>:
  _28 = 8784908 >> x_2(D);
  _29 = _28 & 1;
  _34 = ~_28;
  _32 = _34 & 1;
  _30 = (_Bool) _34;
  if (_30 != 0)
    goto <bb 4>;
  else
    goto <bb 5>;

./gcc -m32 -march=pentium
193.t.optimised pass generates:
<bb 2>:
  _22 = (unsigned int) x_2(D);
  _23 = _22 & 4294967287;
  _24 = _23 + 4294967294;
  if (_24 > 1)
    goto <bb 3>;
  else
    goto <bb 6>;

  <bb 3>:
  _20 = _22 + 4294967279;
  if (_20 > 1)
    goto <bb 4>;
  else
    goto <bb 6>;