[CodeGen] Use the non-virtual alignment when emitting the base
constructor.
Previously, clang would emit an over-aligned (16-byte) store to
initialize B::x in B's base constructor when compiling the following
code:
struct A {
__attribute__((aligned(16))) double data1;
};
struct B : public virtual A {
B() : x(123) {}
double a;
int x;
};
struct C : public virtual B {};
void test() { B b; C c; }
This was happening because the code in IRGen that does member
initialization was using the alignment of a complete object instead of
the non-virtual alignment.
This commit fixes the bug.
rdar://problem/
36382481
Differential Revision: https://reviews.llvm.org/D42521
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@323578
91177308-0d34-0410-b5e6-
96231b3b80d8