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Re: [PATCH] New predicate covering NOP_EXPR and CONVERT_EXPR
On Fri, 2 Dec 2005, Richard Guenther wrote:
> But this is (or should be) purely a frontend issue and has nothing to do
> with the middle-end treating NOP_EXPR and CONVERT_EXPR the same. Same
It doesn't matter whether it's a front end, middle end or back end making
a distinction, if you want to unify NOP_EXPR and CONVERT_EXPR into a
single tree code you need to deal with all of them.
It may well be that more of the places in the middle end should be fixed
just by handling both codes the same but more of the front-end places need
extra conditions inserted. Such middle-end changes should still have
testcases added where possible for any optimization missed because of only
one code being handled.
--
Joseph S. Myers http://www.srcf.ucam.org/~jsm28/gcc/
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