http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50638
Bug #: 50638
Summary: [4.7 Regression] emulated TLS fails
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ia...@gcc.gnu.org
CC: m...@gcc.gnu.org
Host: i686-apple-darwin9
Target: i686-apple-darwin9
Build: i686-apple-darwin9
large number (hundreds, across languages)of emulated TLS tests fail/problem
exposed from r179618
http://gcc.gnu.org/ml/gcc-cvs/2011-10/msg00212.html
---
e.g.
FAIL: gcc.dg/tls/nonpic-1.c (internal compiler error)
====
GNU C (GCC) version 4.7.0 20111006 (experimental) [trunk revision 179619]
(i686-apple-darwin9)
compiled by GNU C version 4.7.0 20111005 (experimental) [trunk revision
179538], GMP version 5.0.2, MPFR version 3.0.1, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 7ba46202133ec4d752524b4545ac8c82
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x02656f48 in set_is_used (var=0x470e4840) at tree-flow-inline.h:562
562 ann->used = true;
(gdb) bt
#0 0x02656f48 in set_is_used (var=0x470e4840) at tree-flow-inline.h:562
#1 0x0265ac37 in mark_all_vars_used_1 (tp=0x470e0b24,
walk_subtrees=0xbfffeb84, data=0x0) at
/GCC/gcc-live-trunk/gcc/tree-ssa-live.c:379
#2 0x02f0d0e3 in walk_tree_1 (tp=0x470e0b24, func=0x265a72c
<mark_all_vars_used_1>, data=0x0, pset=0x0, lh=0) at
/GCC/gcc-live-trunk/gcc/tree.c:10448
#3 0x0265bbff in mark_all_vars_used (expr_p=0x470bbeb8, data=0x0) at
/GCC/gcc-live-trunk/gcc/tree-ssa-live.c:595
#4 0x0265c6aa in remove_unused_locals () at
/GCC/gcc-live-trunk/gcc/tree-ssa-live.c:727
#5 0x019f79ef in execute_function_todo (data=0x8000) at
/GCC/gcc-live-trunk/gcc/passes.c:1695
#6 0x019f7422 in do_per_function (callback=0x19f78da <execute_function_todo>,
data=0x8000) at /GCC/gcc-live-trunk/gcc/passes.c:1548
#7 0x019f7b76 in execute_todo (flags=32768) at
/GCC/gcc-live-trunk/gcc/passes.c:1741
#8 0x019f856e in execute_one_pass (pass=0x34275c0) at
/GCC/gcc-live-trunk/gcc/passes.c:2087
#9 0x019f86b5 in execute_pass_list (pass=0x34275c0) at
/GCC/gcc-live-trunk/gcc/passes.c:2119
#10 0x02266222 in tree_rest_of_compilation (fndecl=0x470a5d80) at
/GCC/gcc-live-trunk/gcc/tree-optimize.c:420
#11 0x00a33edd in cgraph_expand_function (node=0x470133d8) at
/GCC/gcc-live-trunk/gcc/cgraphunit.c:1805
#12 0x00a340b8 in cgraph_expand_all_functions () at
/GCC/gcc-live-trunk/gcc/cgraphunit.c:1864
#13 0x00a34939 in cgraph_optimize () at
/GCC/gcc-live-trunk/gcc/cgraphunit.c:2141
#14 0x00a31b08 in cgraph_finalize_compilation_unit () at
/GCC/gcc-live-trunk/gcc/cgraphunit.c:1312
#15 0x00075a6b in c_write_global_declarations () at
/GCC/gcc-live-trunk/gcc/c-decl.c:9936
#16 0x01e85ef8 in compile_file () at /GCC/gcc-live-trunk/gcc/toplev.c:581
#17 0x01e88b3d in do_compile () at /GCC/gcc-live-trunk/gcc/toplev.c:1925
#18 0x01e88d21 in toplev_main (argc=25, argv=0xbffff1e8) at
/GCC/gcc-live-trunk/gcc/toplev.c:2001
#19 0x002ca1e4 in main (argc=25, argv=0xbffff1e8) at
/GCC/gcc-live-trunk/gcc/main.c:36
(gdb) call debug_tree(0x470e4840)
<var_decl 0x470e4840 __emutls_v.e1
type <record_type 0x470e47e0 __emutls_object BLK
size <integer_cst 0x47009a48 constant 128>
unit size <integer_cst 0x47009a64 constant 16>
align 32 symtab 0 alias set -1 canonical type 0x470e47e0
fields <field_decl 0x470e905c __size type <integer_type 0x4701c3c0
unsigned int>
unsigned SI file (null) line 0 col 0
size <integer_cst 0x4700955c constant 32>
unit size <integer_cst 0x47009578 constant 4>
align 32 offset_align 128
offset <integer_cst 0x47009594 constant 0>
bit offset <integer_cst 0x47009620 constant 0> context <record_type
0x470e47e0 __emutls_object> chain <field_decl 0x470e9000 __align>>
pointer_to_this <pointer_type 0x470e4a20>>
addressable used public static ignored external BLK file
/GCC/gcc-live-trunk/gcc/testsuite/gcc.dg/tls/nonpic-1.c line 5 col 22 size
<integer_cst 0x47009a48 128> unit size <integer_cst 0x47009a64 16>
align 32 context <translation_unit_decl 0x47024ec4 D.1637>>
