[Bug tree-optimization/57860] New: wrong code for bitwise ops with long long literal on x86_64-linux (32-bit mode)

[Bug tree-optimization/57860] New: wrong code for bitwise ops with long long literal on x86_64-linux (32-bit mode)

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57860

            Bug ID: 57860
           Summary: wrong code for bitwise ops with long long literal on
                    x86_64-linux (32-bit mode)
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu

The current gcc trunk mis-compiles the following code on x86_64-linux at -O2
and -O3 in 32-bit mode. This is a regression from 4.8.x. 

$ gcc-trunk -v
gcc version 4.9.0 20130708 (experimental) [trunk revision 200751] (GCC) 
$ gcc-trunk -m32 -O2 reduced.c
$ a.out
0
$ gcc-trunk -m32 -O3 reduced.c
$ a.out
0
$ gcc-trunk -m32 -O0 reduced.c
$ a.out
1
$ gcc-4.8 -m32 -O2 reduced.c
$ a.out
1
$ 


--------------------------------------------


int printf (const char *, ...);

int a, *b = &a, c, d, e, *f = &e, g, *h = &d, k[1] = {1};

int
foo (int p)
{
  for (;; g++)
    {
      for (; c; c--);
      *f = *h = p > ((0x1FFFFFFFFLL ^ a) & *b);
      if (k[g])
    return 0;
    }
}

int
main ()
{
  foo (1);
  printf ("%d\n", d);
  return 0;
}

[Bug tree-optimization/57860] wrong code for bitwise ops with long long literal on x86_64-linux (32-bit mode)

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57860

Mikael Pettersson <mikpe at it dot uu.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vmakarov at gcc dot gnu.org

--- Comment #1 from Mikael Pettersson <mikpe at it dot uu.se> ---
Caused by the LRA changes in r200723.  Author CCd.

[Bug tree-optimization/57860] wrong code for bitwise ops with long long literal on x86_64-linux (32-bit mode)

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57860

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This was introduced with r200723 and got fixed in r200899.

[Bug rtl-optimization/57860] wrong code for bitwise ops with long long literal on x86_64-linux (32-bit mode)

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57860

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug 27 09:24:52 2013
New Revision: 202018

URL: http://gcc.gnu.org/viewcvs?rev=202018&root=gcc&view=rev
Log:
    PR rtl-optimization/57860
    PR rtl-optimization/57861
    PR rtl-optimization/57875
    PR rtl-optimization/57876
    PR rtl-optimization/57877
    * gcc.c-torture/execute/pr57860.c: New test.
    * gcc.c-torture/execute/pr57861.c: New test.
    * gcc.c-torture/execute/pr57875.c: New test.
    * gcc.c-torture/execute/pr57876.c: New test.
    * gcc.c-torture/execute/pr57877.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr57860.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr57861.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr57875.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr57876.c
    trunk/gcc/testsuite/gcc.c-torture/execute/pr57877.c
Modified:
    trunk/gcc/testsuite/ChangeLog