[Bug debug/48204] New: [4.5/4.6/4.7 Regression] ICE: in decimal_to_decnumber, at dfp.c:115 with -fno-tree-ccp -fno-tree-dominator-opts -fno-tree-fre -g

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48204

           Summary: [4.5/4.6/4.7 Regression] ICE: in decimal_to_decnumber,
                    at dfp.c:115 with -fno-tree-ccp
                    -fno-tree-dominator-opts -fno-tree-fre -g
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 23724
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23724
reduced testcase

Compiler output:
$ gcc -O -fno-tree-ccp -fno-tree-dominator-opts -fno-tree-fre -g testcase.c
testcase.c: In function 'foo':
testcase.c:5:1: internal compiler error: in decimal_to_decnumber, at dfp.c:113
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r171179 - crash
4.6 r170955 - crash
4.5 r170955 - crash
4.4 r170955 - OK