[Bug target/34865] New: valgrind error indication in testsuite from i386.c:merge_classes

["hp at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

A r131535 of trunk bootstrapped with --enable-langugages=c
--enable-checking=release,valgrind shows this indication for several
test-cases, the first being tmpdir-gcc.dg-struct-layout-1/t001 
c_compat_x_tst.o compile
(just the first indication of several identical is shown):
Executing on host: /tmp/hptest8/obj/gcc/xgcc -B/tmp/hptest8/obj/gcc/  -w
-I/tmp/hptest8/gcc/gcc/testsuite/gcc.dg/compat  -fno-show
-column -c  -o c_compat_x_tst.o
/tmp/hptest8/obj/gcc/testsuite/gcc/gcc.dg-struct-layout-1//t001_x.c    (timeout
= 300)
==22344== Conditional jump or move depends on uninitialised value(s)
==22344==    at 0x7046E2: merge_classes (i386.c:3558)
==22344==    by 0x7082A0: classify_argument (i386.c:3682)
==22344==    by 0x7083F5: examine_argument (i386.c:3883)
==22344==    by 0x708660: ix86_return_in_memory (i386.c:4752)
==22344==    by 0x5F3178: default_return_in_memory (targhooks.c:113)
==22344==    by 0x52A419: aggregate_value_p (function.c:1801)
==22344==    by 0x543704: gimplify_modify_expr_rhs (gimplify.c:3653)
==22344==    by 0x53D616: gimplify_modify_expr (gimplify.c:3857)
==22344==    by 0x53ED72: gimplify_expr (gimplify.c:5680)
==22344==    by 0x541086: gimplify_and_add (gimplify.c:348)
==22344==    by 0x53D37C: internal_get_tmp_var (gimplify.c:631)
==22344==    by 0x53DF74: gimplify_expr (gimplify.c:6245)


-- 
           Summary: valgrind error indication in testsuite from
                    i386.c:merge_classes
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hp at gcc dot gnu dot org
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34865