Compile the following code:

struct c
{
  int a, b;
  /*constexpr*/ c() : a(1), b(2) { }
};

c v;


The variable v will be defined with:

	.bss
	.align 16
	.type	v, @object
	.size	v, 8
v:
	.zero	8

The variable has alignment 16!

If you uncomment the constexpr and compile with -std=gnu++11 it can be seen that the compiler does know what the correct alignment is:

	.globl	v
	.data
	.align 4
	.type	v, @object
	.size	v, 8
v:
	.long	1
	.long	2


This happens with the current svn version as well as with 4.7.0.