------- Comment #1 from jsm28 at gcc dot gnu dot org  2010-06-05 14:54 -------
Appears to have been introduced by r149722.

r149722 | manu | 2009-07-16 22:29:52 +0000 (Thu, 16 Jul 2009) | 60 lines

2009-07-17  Aldy Hernandez  <aldyh@redhat.com>
            Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR 40435 
        * tree-complex.c, tree-loop-distribution.c,
        tree.c, tree.h, builtins.c, fold-const.c, omp-low.c,
        cgraphunit.c, tree-ssa-ccp.c, tree-ssa-dom.c,
        gimple-low.c, expr.c, tree-ssa-ifcombine.c, c-decl.c,
        stor-layout.c, tree-if-conv.c, c-typeck.c,
        gimplify.c, calls.c, tree-sra.c, tree-mudflap.c,
        tree-ssa-copy.c, tree-ssa-forwprop.c, c-convert.c, c-omp.c,
        varasm.c, tree-inline.c, c-common.c,
        c-common.h, gimple.c, tree-switch-conversion.c, gimple.h,
        tree-cfg.c, c-parser.c, convert.c: Add location
        argument to fold_{unary,binary,ternary}, fold_build[123],
        build_call_expr, build_size_arg, build_fold_addr_expr,
        build_call_array, non_lvalue, size_diffop,
        fold_build1_initializer, fold_build2_initializer,
        fold_build3_initializer, fold_build_call_array,
        fold_build_call_array_initializer, fold_single_bit_test,
        omit_one_operand, omit_two_operands, invert_truthvalue,
        fold_truth_not_expr, build_fold_indirect_ref, fold_indirect_ref,
        combine_comparisons, fold_builtin_*, fold_call_expr,
        build_range_check, maybe_fold_offset_to_address, round_up,
        round_down.
[...]


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-05 14:54:40
               date|                            |
            Summary|gcc 4.5.0 requires c9x      |[4.5/4.6 Regression] gcc
                   |compiler to build           |4.5.0 requires c9x compiler
                   |                            |to build
   Target Milestone|---                         |4.5.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44426