On Tue, 2005-08-09 at 23:06 +0200, Björn Haase wrote: > Steven Bosscher wrote: > > In > > any case, you should assume that it is a much bigger job than just > > modifying the call expander. > > Ok, I had a closer look at what is happening in present state gcc and I > understand that it is indeed a much more complex task than I first thought. > One Issue would be also, that it probably would be worth considering which > other kind of information (except register clobbering information) on a > static leaf function would be worth to be shared with the caller: > > memory usage of the called function / memory clobbers, information on whether > it's a pure function ?
Uh, we produce memory ref/clober info at the tree-ssa level, just not at the RTL level. However, RTL level uses the callgraph info about pure/const functions, which is already extracted through interprocedural analysis (see ipa-pure-const.c)
