On 07/17/2012 02:50 AM, Jakub Jelinek wrote:
> 2012-07-17 Jakub Jelinek
>
> PR rtl-optimization/53942
> * function.c (assign_parm_setup_reg): Avoid zero/sign extension
> directly from likely spilled non-fixed hard registers, move them
> to pseudo first.
>
> * gcc.
Hi!
The following testcase ICEs on i?86, because combiner sees a zero extension
of the likely spilled cx register generated during expansion and as it is
not a simple register move, propagates it into a use many insns later in the
function, enlarging thus the lifetime of the hard register and caus
