[Bug bootstrap/12942] New: [tree-ssa] ICE in expr_phi_insertion, at tree-ssa-pre.c:774 while building newlib

["green at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12942

           Summary: [tree-ssa] ICE in expr_phi_insertion, at tree-ssa-
                    pre.c:774 while building newlib
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: green at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org

The current tree-ssa gcc cannot build newlib, so many toolchains don't build
right now.  This is a relatively new regression (within the past couple of days).

It is also reproducable with the native Linux compiler.  I'll upload the .i file.

$ gcc --version
gcc (GCC) 3.5-tree-ssa 20031107 (merged 20031026)
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -O2 -c arm-elf/libiberty/vasprintf.i
../../../src/HEAD-2003-11-07-A/libiberty/vasprintf.c: In function `int_vasprintf':
 
../../../src/HEAD-2003-11-07-A/libiberty/vasprintf.c:69: internal compiler
error: tree check: accessed operand 2 of va_arg_expr with 1 operands in
expr_phi_insertion, at tree-ssa-pre.c:774
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