http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46527
Summary: Member of template class gets wrong debug location
when template (but not member) is used before member
is defined
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: jyass...@gcc.gnu.org
The debug information should locate Vector4<double>::defined_later() at its
definition (in good.h), not its declaration (in bad.h). This causes problems
for Gold's --detect-odr-violations flag.
Test case:
$ cat test.cc
template <typename VType> struct Vector4 {
# 1 "bad.h" 1
double defined_later();
# 42 "good.h"
};
struct WrapperStruct {
Vector4<double> ClassInstantiated;
};
template <typename VType> double Vector4<VType>::defined_later() {
return 1;
}
void InstantiateMethod() {
Vector4<double>().defined_later();
}
$ ~/gcc/trunk/install/bin/g++ -c -g test.cc -o test.o
$ objdump -dCl test.o
...
0000000000000000 <Vector4<double>::defined_later()>:
_ZN7Vector4IdE13defined_laterEv():
/home/jyasskin/tmp/bad.h:1
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: 48 89 7d f8 mov %rdi,-0x8(%rbp)
/home/jyasskin/tmp/good.h:47
8: 48 b8 00 00 00 00 00 mov $0x3ff0000000000000,%rax
f: 00 f0 3f
12: 48 89 45 f0 mov %rax,-0x10(%rbp)
16: f2 0f 10 45 f0 movsd -0x10(%rbp),%xmm0
/home/jyasskin/tmp/good.h:48
1b: 5d pop %rbp
1c: c3 retq
