trouble emilinating redundant compares

[Dave Korn]

On 17/01/2012 21:16, Paul S wrote:

> For example the i386 seems to use predicates and constraints of the form
> <*_operand> and <m/r/i> for the reload versions of these instructions -
> and I haven't been able to find definitions of these or a mention in
> gcc_internals.pdf of any special meaning assigned to the <> notation.

  See http://gcc.gnu.org/onlinedocs/gccint/Substitutions.html, and take a look
for the define_[code/mode]_[attr/iterator] definitions around line ~650ish of
i386.md

    cheers,
      DaveK