On Thu, 13 Apr 2006 13:29:13 +0200, Paolo Bonzini wrote > > Also, is there a function for simplifying a zero_extract? > > What combine is doing is to expand compound operations such as > zero_extract, simplifying them, and try to make new compound > operations. Therefore you should first try to understand what's > causing combine to miss the simplification.
I think it is simply because combine.c doesn't have any code to simplify this kind of expression. > However, if you add these simplifications to simplify-rtx.c, it will > be picked up by combine. There is a lot of simplification code in combine.c too. Should I try to add these simplifications to both combine.c and simplify-rtx.c? -- Rask Ingemann Lambertsen
