[Bug lto/70831] New: FTBFS: Build fails with bootstrap-lto and profiledbootstrap

["jeffbai at aosc dot xyz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70831

            Bug ID: 70831
           Summary: FTBFS: Build fails with bootstrap-lto and
                    profiledbootstrap
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jeffbai at aosc dot xyz
  Target Milestone: ---

A build failure is observed today when I tested building GCC with both 

./configure ... \
            --with-build-config=bootstrap-lto

and

make profiledboostrap

The build fails when linking libmpx/mpxwrap target, detailed error is shown
below.

/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:520:1:
note: '__mpx_wrapper_strncat' was previously declared here
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:520:1:
note: code may be misoptimized unless -fno-strict-aliasing is used
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c: In
function '__mpx_wrapper_malloc.chkp':
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:35:9:
internal compiler error: in ultimate_transparent_alias_target, at varasm.c:1263
   void *p = (void *)malloc (size);
         ^
0x592d11 ultimate_transparent_alias_target
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1263
0xb68514 ultimate_transparent_alias_target
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1472
0xb68514 make_decl_rtl(tree_node*)
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1349
0x5fc4f2 rtx_for_function_call
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/calls.c:1819
0x5fc4f2 expand_call(tree_node*, rtx_def*, int)
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/calls.c:3152
0x6d95a3 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:10589
0x6e2ae9 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:5406
0x6e383f expand_assignment(tree_node*, tree_node*, bool)
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:5175
0x6087bc expand_call_stmt
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:2658
0x6087bc expand_gimple_stmt_1
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:3548
0x6087bc expand_gimple_stmt
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:3714
0x60a155 expand_gimple_basic_block
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:5720
0x60f006 execute
    /var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:6335
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