http://llvm.org/bugs/show_bug.cgi?id=14354
Bug #: 14354
Summary: operator overloading fails while debugging with gdb
for i386.
Product: clang
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 9547
--> http://llvm.org/bugs/attachment.cgi?id=9547
assembly file for the code
For the given test:
class A1 {
int x;
int y;
public:
A1(int a, int b)
{
x=a;
y=b;
}
A1 operator+(const A1&);
};
A1 A1::operator+(const A1& second)
{
A1 sum(0,0);
sum.x = x + second.x;
sum.y = y + second.y;
return (sum);
}
int main (void)
{
A1 one(2,3);
A1 two(4,5);
return 0;
}
when the exectable of this code is debugged in gdb for i386, we dont get the
expected results.
when we break at return 0; and give the command: print one + two, the result
should be $1 = {x = 6, y = 8}, but the result obtained is $1 = {x = 2, y = 3}.
This is related to debug information generated, as normally the overloading is
occuring.
eg: A1 three = one + two results {x = 6, y = 8}.
On checking the assembly, a suspicious entry is found which may be related for
the failure:
#DEBUG_VALUE: operator+:this <- undef
#DEBUG_VALUE: operator+:second <- undef
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