2 Commits

Author	SHA1	Message	Date
Chris Lattner	4e96d36f72	handle equality memcmp of 8 bytes on x86-64 with two unaligned loads and a ... compare. On other targets we end up with a call to memcmp because we don't want 16 individual byte loads. We should be able to use movups as well, but we're failing to select the generated icmp. llvm-svn: 92107	2009-12-24 01:07:17 +00:00
Chris Lattner	5d3919d5f9	move an optimization for memcmp out of simplifylibcalls and into ... SDISel. This optimization was causing simplifylibcalls to introduce type-unsafe nastiness. This is the first step, I'll be expanding the memcmp optimizations shortly, covering things that we really really wouldn't want simplifylibcalls to do. llvm-svn: 92098	2009-12-24 00:37:38 +00:00