6 Commits

Author	SHA1	Message	Date
Evan Cheng	a5e1362f96	Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123015 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-07 19:35:30 +00:00
Evan Cheng	461f1fc359	Use movups to lower memcpy and memset even if it's not fast (like corei7). ... The theory is it's still faster than a pair of movq / a quad of movl. This will probably hurt older chips like P4 but should run faster on current and future Intel processors. rdar://8817010 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122955 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-06 07:58:36 +00:00
Evan Cheng	0521928ae7	Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy ... etc. takes an option OptSize. If OptSize is true, it would return the inline limit for functions with attribute OptSize. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122952 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-06 06:52:41 +00:00
Evan Cheng	255874ff52	Revert r122936. I'll re-implement the change. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122949 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-06 06:17:53 +00:00
Evan Cheng	9a9d847afa	r105228 reduced the memcpy / memset inline limit to 4 with -Os to avoid blowing ... up freebsd bootloader. However, this doesn't make much sense for Darwin, whose -Os is meant to optimize for size only if it doesn't hurt performance. rdar://8821501 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122936 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-06 01:04:47 +00:00
Bill Wendling	730c07e50d	- Reapply r106066 now that the bzip2 build regression has been fixed. ... - 2010-06-25-CoalescerSubRegDefDead.ll is the testcase for r106878. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106880 91177308-0d34-0410-b5e6-96231b3b80d8	2010-06-25 20:48:10 +00:00