On 03/16/2011 08:01 AM, Chung-Lin Tang wrote:
> * combine.c (try_combine): Do simplification only call of
> subst() on i2 even when i1 is present. Update comments.
>
> testsuite/
> * gcc.target/arm/unsigned-extend-1.c: New testcase.
Ok.
r~
Hi,
this patch adds slightly more simplification in try_combine(), under
-fexpensive-optimizations, by calling subst() to both i2 and i1.
Supplied is an ARM testcase where this resulted in one less redundant
ZERO_EXTEND insn under ARMv6 and above.
Bootstrapped and tested on i686 and x86_64, cross-
