3 Commits

Author	SHA1	Message	Date
Chris Lattner	00e94baf4e	convert cmp to use a multipattern ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115978 91177308-0d34-0410-b5e6-96231b3b80d8	2010-10-07 20:56:25 +00:00
Chris Lattner	04b091a782	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92107 91177308-0d34-0410-b5e6-96231b3b80d8	2009-12-24 01:07:17 +00:00
Chris Lattner	8047d9a6be	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92098 91177308-0d34-0410-b5e6-96231b3b80d8	2009-12-24 00:37:38 +00:00