http://llvm.org/bugs/show_bug.cgi?id=15556
Bug ID: 15556
Summary: [Windows] Returning structures from functions has
wrong ABI
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangbugs at nondot.org
Reporter: timurrrr at google.com
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Example:
----------------
$ cat cl.c
struct S {
int a, b, c;
};
struct S foo(void);
int main(void) {
struct S s = foo();
if (s.a != 1)
return 1;
if (s.b != 2)
return 2;
if (s.c != 3)
return 3;
return 0;
}
----------------
int printf(const char *fmt, ...);
void do_something_complex(void) {
printf("%d %d %d %d\n", 1, 2, 3, 4);
}
struct S {
int a, b, c;
};
struct S foo(void) {
struct S ret;
ret.a = 1;
ret.b = 2;
ret.c = 3;
do_something_complex();
return ret;
}
----------------
$ cl cl.c clang.c && ./cl.exe; echo $?
-> works fine
As of r177589,
$ clang clang.c -c && cl -c cl.c && link clang.o cl.obj && ./clang.exe ; echo
$?
-> Segmentation Fault after the printf.
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