[Bug middle-end/52650] New: [4.8 Regression] FAIL: gcc.dg/torture/pr51106-2.c * (internal compiler error)

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52650

             Bug #: 52650
           Summary: [4.8 Regression] FAIL: gcc.dg/torture/pr51106-2.c  *
                    (internal compiler error)
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dominiq@lps.ens.fr
                CC: hjl.tools@gmail.com, rguenth@gcc.gnu.org


Between revisions 185561 vs revision 185565 (see
http://gcc.gnu.org/ml/gcc-regression/2012-03/msg00223.html ) compiling
gcc.dg/torture/pr51106-2.c has started to give an ICE:

FAIL: gcc.dg/torture/pr51106-2.c  -O0  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O0  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O1  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O1  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O2  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O2  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -fomit-frame-pointer  (internal compiler
error)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -fomit-frame-pointer  (test for excess
errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -g  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -g  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -Os  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -Os  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto -flto-partition=none  (internal
compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto -flto-partition=none  (test for
excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto  (test for excess errors)

The ICE is

/opt/gcc/work/gcc/testsuite/gcc.dg/torture/pr51106-2.c: In function 'bar':
/opt/gcc/work/gcc/testsuite/gcc.dg/torture/pr51106-2.c:8:3: warning: asm
operand 0 probably doesn't match constraints [enabled by default]
/opt/gcc/work/gcc/testsuite/gcc.dg/torture/pr51106-2.c:8:3: error: impossible
constraint in 'asm'
/opt/gcc/work/gcc/testsuite/gcc.dg/torture/pr51106-2.c:12:1: internal compiler
error: in purge_dead_edges, at cfgrtl.c:2462