[Bug bootstrap/66638] New: [6 Regression] profiledbootstrap failure on x86-64 with LTO

["hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66638

            Bug ID: 66638
           Summary: [6 Regression] profiledbootstrap failure on x86-64
                    with LTO
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

On Linux/x86-64, r224827 gave:

../../src-trunk/gcc/tree-ssa-sccvn.c: In function âvn_reference_lookupâ:
../../src-trunk/gcc/tree-ssa-sccvn.c:2254:4: warning: âvaluezied_anythingâ may
be used uninitialized in this function [-Wmaybe-uninitialized]
    || !ao_ref_init_from_vn_reference (&r, vr1.set, vr1.type,
    ^
../../src-trunk/gcc/tree-ssa-sccvn.c:2232:8: note: âvaluezied_anythingâ was
declared here
   bool valuezied_anything;
        ^
../../src-trunk/gcc/lra-constraints.c: In function âcurr_insn_transformâ:
../../src-trunk/gcc/lra-constraints.c:3310:1: internal compiler error: in
loop_exits_before_overflow, at tree-ssa-loop-niter.c:3958
 curr_insn_transform (bool check_only_p)
 ^
0x1096ed2 loop_exits_before_overflow
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:3958
0x1096ed2 scev_probably_wraps_p(tree_node*, tree_node*, gimple_statement_base*,
loop*, bool)
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:4027
0x19285ee convert_affine_scev(loop*, tree_node*, tree_node**, tree_node**,
gimple_statement_base*, bool)
        ../../src-trunk/gcc/tree-chrec.c:1270
0x1927eff chrec_convert_1
        ../../src-trunk/gcc/tree-chrec.c:1325
0x1928265 chrec_convert(tree_node*, tree_node*, gimple_statement_base*, bool)
        ../../src-trunk/gcc/tree-chrec.c:1414
0xfbcba1 interpret_rhs_expr
        ../../src-trunk/gcc/tree-scalar-evolution.c:1879
0xfb9248 interpret_gimple_assign
        ../../src-trunk/gcc/tree-scalar-evolution.c:1921
0xfb9248 analyze_scalar_evolution_1
        ../../src-trunk/gcc/tree-scalar-evolution.c:2003
0xfba15f analyze_scalar_evolution(loop*, tree_node*)
        ../../src-trunk/gcc/tree-scalar-evolution.c:2058
0x1093132 infer_loop_bounds_from_signedness
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:3065
0x1093132 infer_loop_bounds_from_undefined
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:3122
0x1094d23 estimate_numbers_of_iterations_loop
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:3489
0x1095fdc max_loop_iterations(loop*,
generic_wide_int<fixed_wide_int_storage<192> >*)
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:3562
0x10977a2 finite_loop_p(loop*)
        ../../src-trunk/gcc/tree-ssa-loop-niter.c:2157
0x10199f9 find_obviously_necessary_stmts
        ../../src-trunk/gcc/tree-ssa-dce.c:440
0x101b1ff perform_tree_ssa_dce
        ../../src-trunk/gcc/tree-ssa-dce.c:1647
0x101b705 tree_ssa_cd_dce
        ../../src-trunk/gcc/tree-ssa-dce.c:1701
0x101b705 execute
        ../../src-trunk/gcc/tree-ssa-dce.c:1766
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[7]: *** [/tmp/ccYxiq39.ltrans13.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[6]: *** [cc1obj] Error 1

when profiledbootstrap with LTO:

configure --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--enable-bootstrap --with-fpmath=sse --with-build-config=bootstrap-lto
--disable-werror

make -j8 profiledbootstrap
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/66638] [6 Regression] profiledbootstrap failure on x86-64 with LTO
Date: Tue, 23 Jun 2015 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf638

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |6.0