[Bug middle-end/37334] New: gcc.dg/fastmath-2.c doesn't work

[Bug middle-end/37334] New: gcc.dg/fastmath-2.c doesn't work

[hjl dot tools at gmail dot com]

On Linux/ia32, I got

Executing on host: /export/gnu/import/svn/gcc-test/bld/gcc/xgcc
-B/export/gnu/import/svn/gcc-test/bld/gcc/
/export/gnu/import/svn/gcc-test/src-trunk/gcc/testsuite/gcc.dg/fastmath-2.c  
-O2 -ffast-math  -lm   -m32 -o ./fastmath-2.exe    (timeout = 300)
PASS: gcc.dg/fastmath-2.c (test for excess errors)
Setting LD_LIBRARY_PATH to
:/export/gnu/import/svn/gcc-test/bld/gcc:/export/gnu/import/svn/gcc-test/bld/gcc/32::/export/gnu/import/svn/gcc-test/bld/gcc:/export/gnu/import/svn/gcc-test/bld/gcc/32:/export/gnu/import/svn/gcc-test/bld/x86_64-unknown-linux-gnu/libstdc++-v3/.libs:/export/gnu/import/svn/gcc-test/bld/x86_64-unknown-linux-gnu/libmudflap/.libs:/export/gnu/import/svn/gcc-test/bld/x86_64-unknown-linux-gnu/libssp/.libs:/export/gnu/import/svn/gcc-test/bld/x86_64-unknown-linux-gnu/libgomp/.libs:/export/gnu/import/svn/gcc-test/bld/./gcc:/export/gnu/import/svn/gcc-test/bld/./prev-gcc
FAIL: gcc.dg/fastmath-2.c execution test


-- 
           Summary: gcc.dg/fastmath-2.c doesn't work
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37334

[Bug middle-end/37334] gcc.dg/fastmath-2.c doesn't work

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-09-02 20:48 -------
This testcase really should not be applied as it really depends on the
precision of -ffast-math which we don't guarantee at all.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37334

[Bug middle-end/37334] gcc.dg/fastmath-2.c doesn't work

[victork at gcc dot gnu dot org]

------- Comment #2 from victork at gcc dot gnu dot org  2008-09-03 10:20 -------
Yes, looks like a problem in testcase. This patch should fix it:

Index: gcc/testsuite/gcc.dg/fastmath-2.c
===================================================================
--- gcc/testsuite/gcc.dg/fastmath-2.c   (revision 139888)
+++ gcc/testsuite/gcc.dg/fastmath-2.c   (working copy)
@@ -9,9 +9,10 @@ double b;
 int
 main()
 {
+  double c = (1. / 2.002083e-146);
   b = 1. / a;

-  if (b != (1. / 2.002083e-146))
+  if (memcmp ((void *)&b, (void *)&c, sizeof (double)) != 0)
     abort ();
   return 0;
 }


-- 

victork at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |victork at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-09-03 10:20:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37334

[Bug middle-end/37334] gcc.dg/fastmath-2.c doesn't work

[victork at gcc dot gnu dot org]

------- Comment #3 from victork at gcc dot gnu dot org  2008-09-07 07:35 -------
Subject: Bug 37334

Author: victork
Date: Sun Sep  7 07:34:30 2008
New Revision: 140082

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140082
Log:
2008-09-07  Victor Kaplansky  <victork@il.ibm.com>

        PR testsuite/37334
        * gcc/testsuite/gcc.dg/fastmath-2.c: Add volatile to
        definition of b, change -ffast-math to -ffinite-math-only
        and rename test to ...
        * gcc/testsuite/gcc.dg/div-double-1.c: ... this.


Added:
    trunk/gcc/testsuite/gcc.dg/div-double-1.c
Removed:
    trunk/gcc/testsuite/gcc.dg/fastmath-2.c
Modified:
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37334

[Bug testsuite/37334] gcc.dg/fastmath-2.c doesn't work

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2008-09-08 21:37 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
          Component|middle-end                  |testsuite
         Resolution|                            |FIXED
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37334