[Bug middle-end/37151] New: [4.4 Regression] ICE with -fprofile-use and -ftree-loop-linear

[burnus at gcc dot gnu dot org]

Polyhedron benchmark's mdbx (http://www.polyhedron.co.uk/MFL6VW74649)

gfortran -fprofile-generate -ffast-math -march=opteron -ftree-loop-linear -O3
mdbx.f90
./a.out
gfortran -fprofile-use -ffast-math -march=opteron -ftree-loop-linear -O3
mdbx.f90

gives an segmentation fault. No segfault without -ffast-math or
without -ftree-loop-linear

Valgrind reports:

==23369== Invalid read of size 8
==23369==    at 0x4D05B3: ggc_set_mark (ggc-page.c:579)
==23369==    by 0x48ABB4: gt_ggc_mx_lang_tree_node (gt-fortran-f95-lang.h:49)
==23369==    by 0x62A03C: gt_ggc_mx_rtx_def (gtype-desc.c:1500)
==23369==    by 0x48ADB6: gt_ggc_mx_lang_tree_node (gt-fortran-f95-lang.h:204)
==23369==    by 0x6228E4: gt_ggc_mx_varpool_node (gtype-desc.c:118)
==23369==    by 0x5F9826: ggc_mark_roots (ggc-common.c:107)
==23369==    by 0x4D1097: ggc_collect (ggc-page.c:1941)
==23369==    by 0x66DC04: execute_todo (passes.c:1050)
==23369==    by 0x66DE90: execute_one_pass (passes.c:1304)
==23369==    by 0x66E064: execute_pass_list (passes.c:1330)
==23369==    by 0x66E07C: execute_pass_list (passes.c:1331)
==23369==    by 0x66E07C: execute_pass_list (passes.c:1331)
==23369==  Address 0x8 is not stack'd, malloc'd or (recently) free'd
mdbx.f90: In function 'mstep':
mdbx.f90:822: internal compiler error: Segmentation fault


-- 
           Summary: [4.4 Regression] ICE with -fprofile-use and -ftree-loop-
                    linear
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37151