[Bug c/57080] Invalid optimization (-O2) when doing double -> int conversion (on big endian archs(?))

["ondrej at sury dot org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57080

--- Comment #1 from Ondřej Surý <ondrej at sury dot org> 2013-04-26 10:27:30 UTC ---
Created attachment 29945
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29945
Generated from gd.c, affected code is in clip_1d function
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From: "daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/55708] g++ crashes: constexpr function with reference parameters.
Date: Fri, 26 Apr 2013 10:37:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55708

--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2013-04-26 10:37:55 UTC ---
gcc 4.9.0 20130421 (experimental) accepts the code on my system (64-bit mingw).
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/57075] [4.9 Regression] verify_flow_info failed: control flow in the middle of basic block
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idW075

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-26 10:54:45 UTC ---
Ok, I think I reduced this issue to this:

/* PR tree-optimization/57075 */
/* { dg-do compile } */
/* { dg-options "-O2" } */

extern int baz (void) __attribute__ ((returns_twice));
int __attribute__ ((__leaf__))
foo (void)
{
  return __builtin_printf ("$");
}

void
bar ()
{
  foo ();
  baz ();
}