[LLVMbugs] [Bug 12434] New: Polyhedron 2005 benchmark failures with -O2 -ftree-vectorize -fplugin-arg-dragonegg-enable-gcc-optzns

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12434

             Bug #: 12434
           Summary: Polyhedron 2005 benchmark failures with -O2
                    -ftree-vectorize
                    -fplugin-arg-dragonegg-enable-gcc-optzns
           Product: dragonegg
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: New Bugs
        AssignedTo: baldrick at free.fr
        ReportedBy: howarth at nitro.med.uc.edu
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


A number of Polyhedron 2005 benchmarks are now failing when compiled with -O2
-ftree-vectorize -fplugin-arg-dragonegg-enable-gcc-optzns on
x86_64-apple-darwin11 at revision 153840. One example is doduc which when
compiled with...

de-gfortran46 -msse4 -O2 -ftree-vectorize
-fplugin-arg-dragonegg-enable-gcc-optzns -g doduc.f90 -o doduc

fails as...

% ./doduc
 MAIN : FIN S00002
 MAIN : FIN S00001
Illegal instruction

and backtraces in lldb as...


% lldb ./doduc
Current executable set to './doduc' (x86_64).
(lldb) r
Process 12839 launched: '/Users/howarth/Downloads/pb05/lin/source/doduc'
(x86_64)
 MAIN : FIN S00002
 MAIN : FIN S00001
Process 12839 stopped
* thread #1: tid = 0x1f03, 0x0000000100011d31 doduc`s00011_ + 2065 at
doduc.f90:2949, stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP,
subcode=0x0)
    frame #0: 0x0000000100011d31 doduc`s00011_ + 2065 at doduc.f90:2949
   2946                      I6Ft = i
   2947                      J6Ft = j
   2948                   ENDIF
-> 2949                   IF ( z8.LE.zmax ) THEN
   2950                      I8Ft = i
   2951                      J8Ft = j
   2952                      GOTO 200
(lldb) bt
* thread #1: tid = 0x1f03, 0x0000000100011d31 doduc`s00011_ + 2065 at
doduc.f90:2949, stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP,
subcode=0x0)
    frame #0: 0x0000000100011d31 doduc`s00011_ + 2065 at doduc.f90:2949
    frame #1: 0x0000000100019056 doduc`main [inlined] MAIN__ + 439 at
doduc.f90:169
    frame #2: 0x0000000100018e9f doduc`main + 79 at doduc.f90:199
    frame #3: 0x0000000100000d94 doduc`start + 52
(lldb) 

using lldb from Xcode 4.3.2. The other Polyhedron 2005 benchmarks exhibiting
this failure include fatigue and test_fpu

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