On Jun 18, 2007, at 7:46 AM, Dan Gohman wrote: >> Is this necessary? ARM is already doing this by marking trivially re- >> materializable instructions with let isReMaterializable = 1. > > It's not necessary, but it seems cleaner :-). > > In the ARM target, other than instructions that are always trivially > rematerialiable, there's only LDR, with a ReMaterializable clone > named LDRcp. > x86 has a variety of load instructions, so in order to work the way > ARM does > x86 would need a varity of clones, and then the clones wouldn't be > able to > use the automatic instruction selection, so there would still need > to be some > new custom logic for picking which clone to use for each constant.
Ah, good point. Evan, do you think the LDRcp instruction can be eliminated now? -Chris _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
