I recently asked why something doesn't compile. With the latest trunk it compiles fine under some conditions.
// ---- Out.h
class Out {
public:
void out();
};
// ---- Out.cpp
#include "Out.h"
#include <iostream>
void Out::out() {
std::cout << "Hello World" << std::endl;
}
// ---- main.cpp
#include "Out.h"
int main() {
Out o;
o.out();
return 0;
}
compiling this with
clang++ -O4 -o main main.cpp Out.cpp
gives the following error
Alloca array size must be i32
%o = alloca %class.Out, void (%class.Out*)* @_ZN3Out3outEv, align 2 ; <%class.Out*> [#uses=1]
Instruction does not dominate all uses!
%o = alloca %class.Out, void (%class.Out*)* @_ZN3Out3outEv, align 2 ; <%class.Out*> [#uses=1]
call void @_ZN3Out3outEv(%class.Out* %o)
Broken module found, compilation aborted!
Stack dump:
0. Running pass 'Function Pass Manager' on module 'ld-temp.o'.
1. Running pass 'Module Verifier' on function '@main'
The interesting thing is the following
if I modify main.cpp to
// ---- main.cpp
#include "Out.h"
#include <iostream>
int main() {
Out o;
o.out();
return 0;
}
It compiles fine and the binary runes fine too.
This makes me think that there was to much optimization done during compile time when compiling Out.cpp
Any ideas?
Toralf
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