https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61436
Bug ID: 61436
Summary: [4.10 Regression]: g++.dg/tls/diag-1.C ICE (emutls)
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: regression
Assignee: unassigned at gcc dot gnu.org
Reporter: hp at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org
Host: x86_64-unknown-linux-gnu
Target: mmix-knuth-mmixware
This test previously passed, now it fails.
A patch in the revision range (last_known_working:first_known_failing)
r210000:r211121
exposed or caused these regressions. Since then (up to and including at least
r211290) it fails as follows:
Running /home/hp/gcctop/tmp/mbgnu0/gcc/gcc/testsuite/g++.dg/tls/tls.exp ...
FAIL: g++.dg/tls/diag-1.C -std=c++98 (internal compiler error)
FAIL: g++.dg/tls/diag-1.C -std=c++98 (test for excess errors)
FAIL: g++.dg/tls/diag-1.C -std=c++11 (internal compiler error)
FAIL: g++.dg/tls/diag-1.C -std=c++11 (test for excess errors)
FAIL: g++.dg/tls/diag-1.C -std=c++1y (internal compiler error)
FAIL: g++.dg/tls/diag-1.C -std=c++1y (test for excess errors)
I'm guessing all emutls targets are affected.
The messages in g++.log are similar:
spawn -ignore SIGHUP
/home/hp/gcctop/tmp/mbase0/gccobj/gcc/testsuite/g++/../../xg++
-B/home/hp/gcctop/tmp/mbase0/gccobj/gcc/testsuite/g++/../../
/home/hp/gcctop/tmp/mbase0/gcc/gcc/testsuite/g++.dg/tls/diag-1.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/hp/gcctop/tmp/mbase0/gccobj/mmix/libstdc++-v3/include/mmix
-I/home/hp/gcctop/tmp/mbase0/gccobj/mmix/libstdc++-v3/include
-I/home/hp/gcctop/tmp/mbase0/gcc/libstdc++-v3/libsupc++
-I/home/hp/gcctop/tmp/mbase0/gcc/libstdc++-v3/include/backward
-I/home/hp/gcctop/tmp/mbase0/gcc/libstdc++-v3/testsuite/util -fmessage-length=0
-std=c++98 -pedantic-errors -Wno-long-long -S -isystem
/home/hp/gcctop/tmp/mbase0/gccobj/mmix/./newlib/targ-include -isystem
/home/hp/gcctop/tmp/mbase0/gcc/newlib/libc/include -o diag-1.s
/home/hp/gcctop/tmp/mbase0/gcc/gcc/testsuite/g++.dg/tls/diag-1.C:31:1: internal
compiler error: in symtab_get_node, at cgraph.h:1035
0xd610c3 symtab_get_node
/home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraph.h:1032
0xd610c3 varpool_get_node
/home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraph.h:1074
0xd610c3 varpool_node_for_decl(tree_node*)
/home/hp/gcctop/tmp/mbase0/gcc/gcc/varpool.c:147
0xd54cb4 make_decl_one_only(tree_node*, tree_node*)
/home/hp/gcctop/tmp/mbase0/gcc/gcc/varasm.c:5932
0xb2a14e get_emutls_init_templ_addr
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:254
0xb2a14e get_emutls_init_templ_addr
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:222
0xb2aade new_emutls_decl
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:339
0xb2aade create_emultls_var
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:717
0xd625ef varpool_for_node_and_aliases(varpool_node*, bool (*)(varpool_node*,
void*), void*, bool)
/home/hp/gcctop/tmp/mbase0/gcc/gcc/varpool.c:682
0xb2ba87 ipa_lower_emutls
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:788
0xb2ba87 execute
/home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:849
Please submit a full bug report,
with preprocessed source if appropriate.
Looking at the code, it seems the assert in symtab_get_node at cgraph.h:1035
trigs. This code was changed in r210901, though the assert was only copied.
Still, many changes around that time by the same author, so there's a good
chance the attribution is correct. :)
A gdb session shows, at the gcc_assert:
(gdb) p decl
$15 = (const_tree) 0x7ffff7ea68e8
(gdb) pt
<var_decl 0x7ffff7ea68e8 __emutls_t__ZN1BIiE1tE
type <integer_type 0x7ffff7dbd690 int sizes-gimplified public type_6 SI
size <integer_cst 0x7ffff7dbce28 constant 32>
unit size <integer_cst 0x7ffff7dbce40 constant 4>
align 32 symtab 0 alias set -1 canonical type 0x7ffff7dbd690 precision
32 min <integer_cst 0x7ffff7dbcde0 -2147483648> max <integer_cst 0x7ffff7dbcdf8
2147483647>
pointer_to_this <pointer_type 0x7ffff7dd1738>>
readonly used public ignored weak SI file
/home/hp/gcctop/tmp/mbase0/gcc/gcc/testsuite/g++.dg/tls/diag-1.C line 25 col 12
size <integer_cst 0x7ffff7dbce28 32> unit size <integer_cst 0x7ffff7dbce40 4>
align 32 context <record_type 0x7ffff7ea2540 B>>
(gdb) bt
#0 fancy_abort (file=0xfa7550 "/home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraph.h",
line=1035, function=0xfa77e0 "symtab_get_node")
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/diagnostic.c:1190
#1 0x0000000000d64ed4 in symtab_get_node (decl=0x7ffff7ea68e8)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraph.h:1032
#2 0x0000000000d64f8b in varpool_get_node (decl=0x7ffff7ea68e8)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraph.h:1074
#3 0x0000000000d655fc in varpool_node_for_decl (decl=
<var_decl 0x7ffff7ea68e8 __emutls_t__ZN1BIiE1tE>)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/varpool.c:147
#4 0x0000000000d58c85 in make_decl_one_only (decl=0x7ffff7ea68e8,
comdat_group=0x7ffff7e9ca50)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/varasm.c:5932
#5 0x0000000000b2e11f in get_emutls_init_templ_addr (decl=0x7ffff7e94da8)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:254
#6 get_emutls_init_templ_addr (decl=0x7ffff7e94da8)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:222
#7 0x0000000000b2eaaf in new_emutls_decl (alias_of=0x0, decl=0x7ffff7e94da8)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:339
#8 create_emultls_var (var=0x7ffff7ea31c0, data=0x7fffffffe888)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:717
#9 0x0000000000d66ccd in varpool_for_node_and_aliases (node=0x7ffff7ea31c0,
callback=0xb2e600 <create_emultls_var(varpool_node*, void*)>, data=
0x7fffffffe888, include_overwritable=true)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/varpool.c:682
#10 0x0000000000b2fa58 in ipa_lower_emutls ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:788
#11 (anonymous namespace)::pass_ipa_lower_emutls::execute (
this=<optimized out>)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/tree-emutls.c:849
#12 0x0000000000a54cc8 in execute_one_pass (pass=pass@entry=
<opt_pass* 0x142cf80 "emutls"(47)>)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/passes.c:2180
#13 0x0000000000a5569b in execute_ipa_pass_list (pass=
<opt_pass* 0x142cf80 "emutls"(47)>)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/passes.c:2571
#14 0x00000000007e8850 in ipa_passes ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraphunit.c:2054
#15 compile () at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraphunit.c:2185
#16 0x00000000007e9095 in finalize_compilation_unit ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cgraphunit.c:2340
#17 0x00000000005cc468 in cp_write_global_declarations ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/cp/decl2.c:4647
#18 0x0000000000ad8485 in compile_file ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/toplev.c:562
#19 0x0000000000ada245 in do_compile ()
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/toplev.c:1918
#20 toplev_main (argc=17, argv=0x7fffffffec38)
at /home/hp/gcctop/tmp/mbase0/gcc/gcc/toplev.c:1994
#21 0x0000003522e21735 in __libc_start_main () from /lib64/libc.so.6
#22 0x00000000004d2495 in _start ()
(gdb)
Author of one or more suspect patches in revision range CC:ed.
