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[Bug lto/69188] [5/6/7 Regression] ICE when linking objects at different optimization levels with LTO and profile generation enabled. (Works with 4.9.3.)
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 01 Dec 2016 14:21:26 +0000
- Subject: [Bug lto/69188] [5/6/7 Regression] ICE when linking objects at different optimization levels with LTO and profile generation enabled. (Works with 4.9.3.)
- Auto-submitted: auto-generated
- References: <bug-69188-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69188
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-12-01
CC| |hubicka at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Known to work| |4.9.4
Ever confirmed|0 |1
Known to fail| |5.4.0, 6.2.0, 7.0
--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
lto1: internal compiler error: in lto_varpool_replace_node, at
lto/lto-symtab.c:122
0x62e519 lto_varpool_replace_node
/space/rguenther/src/gcc-git/gcc/lto/lto-symtab.c:122
0x62f67a lto_symtab_merge_symbols_1
/space/rguenther/src/gcc-git/gcc/lto/lto-symtab.c:882
0x62f67a lto_symtab_merge_symbols()
/space/rguenther/src/gcc-git/gcc/lto/lto-symtab.c:939
0x62352e read_cgraph_and_symbols
/space/rguenther/src/gcc-git/gcc/lto/lto.c:2930
0x62352e lto_main()
/space/rguenther/src/gcc-git/gcc/lto/lto.c:3304
Please submit a full bug report,
The test is just using -O -fprofile-generate -flto -fPIC and letting option
auto-deduce work at link time (no options given). One file is built with -O0.
118 static void
119 lto_varpool_replace_node (varpool_node *vnode,
120 varpool_node *prevailing_node)
121 {
122 gcc_assert (!vnode->definition || prevailing_node->definition);
123 gcc_assert (!vnode->analyzed || prevailing_node->analyzed);
124
125 prevailing_node->clone_referring (vnode);
126 if (vnode->force_output)
(gdb) p vnode->definition
$1 = 1
(gdb) p prevailing_node->definition
$2 = 0
(gdb) p vnode->analyzed
$3 = 1
(gdb) p prevailing_node->analyzed
$4 = 0