http://llvm.org/bugs/show_bug.cgi?id=18513
Bug ID: 18513
Summary: clang generates layout incompatible with gcc and icc
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
consider:
typedef __SIZE_TYPE__ size_t;
extern "C" int printf(const char *, ...);
static char buffer[419430400];
inline void *operator new(size_t, void *pv) { return pv; }
struct A {
__attribute__((aligned(32))) bool AField;
A() {}
};
struct B : A {
__attribute__((aligned(16))) long long : 1;
bool BField;
B() {
printf("BField: %ld\n", (long)((char *)&BField - buffer));
}
};
int main() { new (buffer) B; }
gcc and icc give:
BField: 17
clang gives:
BField: 2
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