cc1plus crashes for the testcase I'll attach later. There is a PLUS_EXPR, the
second operand of which is NULL. setting a breakpoint cgraph_lower_function
shows that the crash happens after cgraph_lower_function is called a second
time;
moreover, the by probing the different addresses where the PLUS_EXPR ended up
during multiple runs, the offending PLUS_EXPR can be found at the start of
the second cgraph_lower_function call:
(gdb) p ((tree)0xb595ff9c)->common.code
$7 = PLUS_EXPR
(gdb) call debug_tree((tree)0xb595ff9c)
<plus_expr 0xb595ff9c
type <pointer_type 0xb595eb24
type <pointer_type 0xb593205c type <pointer_type 0xb5927f74
__vtbl_ptr_type>
sizes-gimplified unsigned SI
size <integer_cst 0xb58ab3f0 constant invariant 32>
unit size <integer_cst 0xb58ab180 constant invariant 4>
align 32 symtab 0 alias set -1
pointer_to_this <pointer_type 0xb595eb24>>
unsigned SI size <integer_cst 0xb58ab3f0 32> unit size <integer_cst
0xb58ab180 4>
align 32 symtab 0 alias set -1>
readonly
arg 0 <var_decl 0xb5961b00 __vtt_parm.7 type <pointer_type 0xb595eb24>
used unsigned ignored SI file foo.ii line 30 size <integer_cst
0xb58ab3f0 32> unit size <integer_cst 0xb58ab180 4>
align 32 context <function_decl 0xb5955580 __comp_ctor > abstract_origin
<var_decl 0xb595a9f8 __vtt_parm.7>
chain <var_decl 0xb5961b58 D.1949 type <pointer_type 0xb595eb24>
used unsigned ignored SI file foo.ii line 30 size <integer_cst
0xb58ab3f0 32> unit size <integer_cst 0xb58ab180 4>
align 32 context <function_decl 0xb5955580 __comp_ctor >
abstract_origin <var_decl 0xb595aa50 D.1901> chain <var_decl 0xb5961bb0
D.1950>>>>
Strangely enough, the this PLUS_EXPRESSION appears not to have been made by
make_node_stat.
--
Summary: second operand of PLUS_EXPR is NULL (in constructor)
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: amylaar at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23984
