llvm-project

Commit Graph

Author	SHA1	Message	Date
Chris Lattner	ae8d67d3bb	convert cmp to use a multipattern llvm-svn: 115978	2010-10-07 20:56:25 +00:00
Chris Lattner	f5e3ed64d5	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	1a32ede6fd	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

Author

SHA1

Message

Date

Chris Lattner

ae8d67d3bb

convert cmp to use a multipattern

llvm-svn: 115978

2010-10-07 20:56:25 +00:00

Chris Lattner

f5e3ed64d5

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

1a32ede6fd

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

3 Commits