https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63814
Bug ID: 63814
Summary: g++.dg/ipa/pr61160-1.C fails with -m32 on darwin14
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: fxcoudert at gcc dot gnu.org
With -O3 -m32, g++.dg/ipa/pr61160-1.C fails on x86_64-apple-darwin14. This is a
very slightly reduced testcase:
---------------------------------
struct CBase {
virtual void BaseFunc () {}
};
struct MMixin {
virtual void * MixinFunc (int, int) = 0;
};
struct CExample: CBase, public MMixin
{
void *MixinFunc (int arg, int arg2)
{
return this;
}
};
void *test (MMixin & anExample)
{
return anExample.MixinFunc (0, 0);
}
int main ()
{
CExample c;
return (test (c) != 0);
}
---------------------------------
The failure is:
$ ./bin/g++ pr61160-1.C -m32 -O3
pr61160-1.C:26:1: error: edge points to wrong declaration:
}
^
<function_decl 0x142795e58 MixinFunc.constprop
type <method_type 0x142799930
type <pointer_type 0x1426272a0 type <void_type 0x142627150 void>
public unsigned SI
size <integer_cst 0x142601e70 constant 32>
unit size <integer_cst 0x142601e88 constant 4>
align 32 symtab 0 alias set 1 canonical type 0x1426272a0
pointer_to_this <pointer_type 0x14262ec78>>
QI
size <integer_cst 0x142601fa8 constant 8>
unit size <integer_cst 0x142601fc0 constant 1>
align 8 symtab 0 alias set -1 canonical type 0x142799930 method
basetype <record_type 0x14277db28 CExample>
arg-types <tree_list 0x1427a4370 value <pointer_type 0x14277ddc8>
chain <tree_list 0x142617bb8 value <void_type 0x142627150 void>>>>
readonly addressable used nothrow static autoinline decl_5 QI defer-output
file pr61160-1.C line 11 col 9 align 16 context <record_type 0x14277db28
CExample>>
Instead of: <function_decl 0x14276ea20 _ZThn4_N8CExample9MixinFuncEii
type <method_type 0x14277dd20
type <pointer_type 0x1426272a0 type <void_type 0x142627150 void>
public unsigned SI
size <integer_cst 0x142601e70 constant 32>
unit size <integer_cst 0x142601e88 constant 4>
align 32 symtab 0 alias set 1 canonical type 0x1426272a0
pointer_to_this <pointer_type 0x14262ec78>>
QI
size <integer_cst 0x142601fa8 constant 8>
unit size <integer_cst 0x142601fc0 constant 1>
align 8 symtab 0 alias set -1 canonical type 0x14277dd20 method
basetype <record_type 0x14277db28 CExample>
arg-types <tree_list 0x14277c640 value <pointer_type 0x14277ddc8>
chain <tree_list 0x14277c320 value <integer_type 0x142605690 int>
chain <tree_list 0x14277c348 value <integer_type 0x142605690
int>
chain <tree_list 0x142617bb8 value <void_type 0x142627150
void>>>>>
pointer_to_this <pointer_type 0x14277f3f0>>
readonly addressable asm_written used public weak virtual decl_5 QI file
pr61160-1.C line 11 col 9 align 8 context <record_type 0x14277db28 CExample>
full-name "virtual void* CExample::_ZThn4_N8CExample9MixinFuncEii(int,
int)"
>
main/13 (int main()) @0x14278d188
Type: function definition analyzed
Visibility: externally_visible public
References:
Referring:
Availability: available
First run: 0
Function flags: body only_called_at_startup
Called by:
Calls: _ZN8CExample9MixinFuncEii.constprop.3/35 (1.00 per call) (can throw
external)
pr61160-1.C:26:1: internal compiler error: verify_cgraph_node failed
pr61160-1.C:26:1: internal compiler error: Abort trap: 6
g++: internal compiler error: Abort trap: 6 (program cc1plus)
zsh: abort ./bin/g++ pr61160-1.C -m32 -O3
and the backtrace is:
* frame #0: 0x0000000100ee03f0 cc1plus`internal_error(char const*, ...)
frame #1: 0x000000010069adb7 cc1plus`cgraph_node::verify_node() + 4935
frame #2: 0x000000010068fb48 cc1plus`symtab_node::verify() + 104
frame #3: 0x00000001006904a8 cc1plus`symtab_node::verify_symtab_nodes() +
152
frame #4: 0x000000010097ebfc
cc1plus`symbol_table::remove_unreachable_nodes(bool, __sFILE*) + 7148
frame #5: 0x0000000100a5f60c cc1plus`execute_todo(unsigned int) + 348
frame #6: 0x0000000100a61e2f cc1plus`execute_one_pass(opt_pass*) + 495
frame #7: 0x0000000100a62aaa cc1plus`execute_ipa_pass_list(opt_pass*) + 154
frame #8: 0x00000001006a18e9 cc1plus`symbol_table::compile() + 1385
frame #9: 0x00000001006a375e
cc1plus`symbol_table::finalize_compilation_unit() + 110
frame #10: 0x00000001001062e0 cc1plus`cp_write_global_declarations() + 4480
frame #11: 0x0000000100b3cebf cc1plus`compile_file() + 143
frame #12: 0x0000000100ff1ae4 cc1plus`toplev::main(int, char**) + 3764
frame #13: 0x0000000100ff210c cc1plus`main + 44
