[Bug middle-end/60445] New: [4.9 Regression] 473.astar miscompares with -Ofast

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60445

            Bug ID: 60445
           Summary: [4.9 Regression] 473.astar miscompares with -Ofast
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
            Target: x86_64-*-*, i?86-*-*

Seen on x86_64 with -Ofast and on both x86_64 and i?86 with -Ofast -flto
-march=native.

*** Miscompare of BigLakes2048.out, see
/gcc/spec/cpu2006/benchspec/CPU2006/473.astar/run/run_peak_ref_x86_64-linux.0002/BigLakes2048.out.mis
0009:  Total way length : 761939
       Total way length : 741884
                               ^
0012:  Reg ways quantity : 4603
       Reg ways quantity : 4314
                              ^
0013:  Total reg way length : 1417263
       Total reg way length : 786132
                                   ^
0017:  Total river way length : 173223
       Total river way length : 163674
                                     ^
...

*** Miscompare of rivers.out, see
/gcc/spec/cpu2006/benchspec/CPU2006/473.astar/run/run_peak_ref_x86_64-linux.0002/rivers.out.mis
0008:  Ways quantity : 16536
       Ways quantity : 16353
                           ^
0009:  Total way length : 5106389
       Total way length : 5086593
                                ^
0012:  Reg ways quantity : 39579
       Reg ways quantity : 34944
                               ^