[RFH] [tree-ssa] disabling lowering for &a->b causes ICE

[Andrew Pinski <pinskia at physics dot uc dot edu>]

When I disable the lowering of &a->b in the C or C++ front-ends, I get 
an
ICE because for some reason a SSA_NAME made it through to expand.  This
patch should be used to solve PR 14029 when this is ICE is fixed.

The test-case I get the ICE with:
struct a
{
int i;
};
int *h(struct a *b)
{
  return &b->i;
}

This works at -O0 because there is no rewrite into SSA.
I need help figuring out why the variable is not rewrote out of SSA.

The patch which I used, this is also the patch to change offsetof to a 
builtin and
lower that only to make sure that offsetof is a constant as it needs to 
be.

Attachment: offset_disable_lower.diff.txt
Description: Text document

Attached also is the optimized dump, I know that there is no partition 
map for the variable
but I do not know why.

Attachment: ttt.c.t46.optimized
Description: Binary data