[PATCH] Small cleanups to cse.c

[Eric Botcazou]

> Well, not incorrect, just different. You'll find the form I suggested
> in a lot of places in GCC as well.

Then they should be corrected too.  system.h is rather clear:

/* Use gcc_assert(EXPR) to test invariants.  */
#if ENABLE_ASSERT_CHECKING
#define gcc_assert(EXPR) 						\
   ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
#else
/* Include EXPR, so that unused variable warnings do not occur.  */
#define gcc_assert(EXPR) ((void)(0 && (EXPR)))
#endif

/* Use gcc_unreachable() to mark unreachable locations (like an
   unreachable default case of a switch.  Do not use gcc_assert(0).  */
#define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))

> This would also work, but in this form we wouldn't check that insn has
> the valid form if gcc is configured with assert checking disabled.

This is not supposed to happen by default, releases are configured with 
--enable-checking=assert,runtime.

-- 
Eric Botcazou