[Bug lto/64262] New: [5 Regression] Several LTO failures after r218609 when compiling with -fpic.

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64262

            Bug ID: 64262
           Summary: [5 Regression] Several LTO failures after r218609 when
                    compiling with -fpic.
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: hubicka at gcc dot gnu.org

After r218609 the following tests fail when compiled with -fpic, e.g. darwin:

FAIL: g++.dg/ipa/pr64059.C  -std=gnu++11 (internal compiler error)
FAIL: g++.dg/ipa/pr64059.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/ipa/pr64059.C  -std=gnu++14 (internal compiler error)
FAIL: g++.dg/ipa/pr64059.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ipa/pr64059.C  -std=gnu++98 (internal compiler error)
FAIL: g++.dg/ipa/pr64059.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_0.o assemble, -O0 -flto
-flto-partition=1to1 -fno-use-linker-plugin  (internal compiler error)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_0.o assemble, -O0 -flto
-flto-partition=none -fuse-linker-plugin (internal compiler error)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_0.o assemble, -O0 -flto
-fuse-linker-plugin -fno-fat-lto-objects  (internal compiler error)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_1.o assemble, -O0 -flto
-flto-partition=1to1 -fno-use-linker-plugin  (internal compiler error)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_1.o assemble, -O0 -flto
-flto-partition=none -fuse-linker-plugin (internal compiler error)
FAIL: g++.dg/lto/20081119 cp_lto_20081119_1.o assemble, -O0 -flto
-fuse-linker-plugin -fno-fat-lto-objects  (internal compiler error)
FAIL: g++.dg/lto/20081211-1 cp_lto_20081211-1_0.o assemble, -O0 -flto
-flto-partition=1to1 -fno-use-linker-plugin  (internal compiler error)
FAIL: g++.dg/lto/20081211-1 cp_lto_20081211-1_0.o assemble, -O0 -flto
-flto-partition=none -fuse-linker-plugin (internal compiler error)
FAIL: g++.dg/lto/20081211-1 cp_lto_20081211-1_0.o assemble, -O0 -flto
-fuse-linker-plugin -fno-fat-lto-objects  (internal compiler error)
FAIL: g++.dg/lto/pr45621 cp_lto_pr45621_1.o assemble, -O0 -flto
-flto-partition=1to1 -fno-use-linker-plugin  (internal compiler error)
FAIL: g++.dg/lto/pr45621 cp_lto_pr45621_1.o assemble, -O0 -flto
-flto-partition=none -fuse-linker-plugin (internal compiler error)
FAIL: g++.dg/lto/pr45621 cp_lto_pr45621_1.o assemble, -O0 -flto
-fuse-linker-plugin -fno-fat-lto-objects  (internal compiler error)
FAIL: g++.dg/lto/pr52605 cp_lto_pr52605_0.o assemble, -flto -g (internal
compiler error)
FAIL: g++.dg/lto/v1-plugin-api-not-supported
cp_lto_v1-plugin-api-not-supported_0.o assemble, -O0 -flto -flto-partition=1to1
-fno-use-linker-plugin  (internal compiler error)
FAIL: g++.dg/lto/v1-plugin-api-not-supported
cp_lto_v1-plugin-api-not-supported_0.o assemble, -O0 -flto -flto-partition=none
-fuse-linker-plugin (internal compiler error)
FAIL: g++.dg/lto/v1-plugin-api-not-supported
cp_lto_v1-plugin-api-not-supported_0.o assemble, -O0 -flto -fuse-linker-plugin
-fno-fat-lto-objects  (internal compiler error)

see https://gcc.gnu.org/ml/gcc-regression/2014-12/msg00350.html.

The backtrace is

* thread #1: tid = 0x83eeb52, 0x0000000100e6d411
cc1plus`get_binfo_at_offset(tree_node*, long long, tree_node*) [inlined]
tree_check(__c=tree_code at scalar(0xffffffffffffffff), __g=<unavailable>,
__l=int at scalar(0xffffffffffffffff), __f=<unavailable>, __t=<unavailable>) at
tree.h:2763, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=1, address=0x0)
    frame #0: 0x0000000100e6d411 cc1plus`get_binfo_at_offset(tree_node*, long
long, tree_node*) [inlined] tree_check(__c=tree_code at
scalar(0xffffffffffffffff), __g=<unavailable>, __l=int at
scalar(0xffffffffffffffff), __f=<unavailable>, __t=<unavailable>) at
tree.h:2763
   2760    inline tree
   2761    tree_check (tree __t, const char *__f, int __l, const char *__g,
tree_code __c)
   2762    {
-> 2763      if (TREE_CODE (__t) != __c)
   2764        tree_check_failed (__t, __f, __l, __g, __c, 0);
   2765      return __t;
   2766    }
(lldb) bt
* thread #1: tid = 0x83eeb52, 0x0000000100e6d411
cc1plus`get_binfo_at_offset(tree_node*, long long, tree_node*) [inlined]
tree_check(__c=tree_code at scalar(0xffffffffffffffff), __g=<unavailable>,
__l=int at scalar(0xffffffffffffffff), __f=<unavailable>, __t=<unavailable>) at
tree.h:2763, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=1, address=0x0)
  * frame #0: 0x0000000100e6d411 cc1plus`get_binfo_at_offset(tree_node*, long
long, tree_node*) [inlined] tree_check(__c=tree_code at
scalar(0xffffffffffffffff), __g=<unavailable>, __l=int at
scalar(0xffffffffffffffff), __f=<unavailable>, __t=<unavailable>) at
tree.h:2763
    frame #1: 0x0000000100e6d411
cc1plus`get_binfo_at_offset(binfo=0x0000000000000000, offset=0,
expected_type=0x0000000142774348) + 17
    frame #2: 0x0000000100961eba
cc1plus`possible_polymorphic_call_targets(otr_type=0x0000000142774348,
otr_token=2, context=ipa_polymorphic_call_context at 0x00007fff5fbfefc0,
completep=<unavailable>, cache_token=<unavailable>, speculative=<unavailable>)
+ 2906 at ipa-devirt.c:2404
    frame #3: 0x0000000100a34dca
cc1plus`compute_ltrans_boundary(in_encoder=0x0000000102100f50) + 2186 at
ipa-utils.h:109
    frame #4: 0x0000000100ab3265
cc1plus`ipa_write_summaries(offload_lto_mode=<unavailable>) + 469 at
passes.c:2511
    frame #5: 0x000000010069a1bd
cc1plus`symbol_table::compile(this=0x0000000142605000) + 1805 at
cgraphunit.c:2091
    frame #6: 0x000000010069bfde
cc1plus`symbol_table::finalize_compilation_unit(this=0x0000000142605000) + 110
at cgraphunit.c:2340
    frame #7: 0x0000000100107ad0 cc1plus`cp_write_global_declarations() + 4608
at decl2.c:4688
    frame #8: 0x0000000100b9195f cc1plus`compile_file + 143 at toplev.c:583
    frame #9: 0x000000010106012f cc1plus`toplev::main(int, char**) + 1271 at
toplev.c:2017
    frame #10: 0x000000010105fc38 cc1plus`toplev::main(this=<unavailable>,
argc=3, argv=0x00007fff5fbff368) + 776
    frame #11: 0x0000000101060d6c cc1plus`main(argc=3, argv=0x00007fff5fbff368)
+ 44 at main.c:38