Evan Cheng
bbed81df25
Add Mode64Bit feature and sink it down to MC layer.
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llvm-svn: 134641
2011-07-07 21:06:52 +00:00
Eli Friedman
09ec41fcde
Avoid extra vreg copies for arguments passed in registers. Specifically, this can make MachineCSE more effective in some cases (especially in small functions). PR8361 / part of rdar://problem/8259436 .
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llvm-svn: 130928
2011-05-05 16:53:34 +00:00
Evan Cheng
ae26b91353
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.
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llvm-svn: 123015
2011-01-07 19:35:30 +00:00
Evan Cheng
1a1771584e
Use movups to lower memcpy and memset even if it's not fast (like corei7).
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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
llvm-svn: 122955
2011-01-06 07:58:36 +00:00
Evan Cheng
cb39cc2164
Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy
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etc. takes an option OptSize. If OptSize is true, it would return
the inline limit for functions with attribute OptSize.
llvm-svn: 122952
2011-01-06 06:52:41 +00:00
Evan Cheng
70711ea54d
Revert r122936. I'll re-implement the change.
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llvm-svn: 122949
2011-01-06 06:17:53 +00:00
Evan Cheng
d425aa5d2a
r105228 reduced the memcpy / memset inline limit to 4 with -Os to avoid blowing
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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
llvm-svn: 122936
2011-01-06 01:04:47 +00:00
Bill Wendling
3f9cb6828a
- Reapply r106066 now that the bzip2 build regression has been fixed.
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- 2010-06-25-CoalescerSubRegDefDead.ll is the testcase for r106878.
llvm-svn: 106880
2010-06-25 20:48:10 +00:00
