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7 Commits

Author SHA1 Message Date
David Zarzycki
a7a515cb77 Prefer AVX512 memcpy when applicable 
When AVX512 is available and the preferred vector width is 512-bits or
more, we should prefer AVX512 for memcpy().

https://bugs.llvm.org/show_bug.cgi?id=43240

https://reviews.llvm.org/D67874

llvm-svn: 372540
 2019-09-23 05:00:59 +00:00
Craig Topper
38014c553f [X86] Add test memset and memcpy testcases for D67874. NFC 
llvm-svn: 372494
 2019-09-22 06:52:25 +00:00
Philip Reames
b61eaebb6b [Tests] Expand coverage of small memset zero idioms 
llvm-svn: 360210
 2019-05-07 23:48:42 +00:00
Clement Courbet
76f4ae1092 [CodeGen] Allow mempcy/memset to generate small overlapping stores. 
Summary:
All targets either just return false here or properly model `Fast`, so I
don't think there is any reason to prevent CodeGen from doing the right
thing here.

Subscribers: nemanjai, javed.absar, eraman, jsji, llvm-commits

Differential Revision: https://reviews.llvm.org/D55365

llvm-svn: 349016
 2018-12-13 09:56:19 +00:00
Clement Courbet
8b6434bbb9 Revert r348843 "[CodeGen] Allow mempcy/memset to generate small overlapping stores." 
Breaks ARM/memcpy-inline.ll

llvm-svn: 348844
 2018-12-11 13:38:43 +00:00
Clement Courbet
93b3445770 [CodeGen] Allow mempcy/memset to generate small overlapping stores. 
Summary:
All targets either just return false here or properly model `Fast`, so I
don't think there is any reason to prevent CodeGen from doing the right
thing here.

Subscribers: nemanjai, javed.absar, eraman, jsji, llvm-commits

Differential Revision: https://reviews.llvm.org/D55365

llvm-svn: 348843
 2018-12-11 13:15:56 +00:00
Clement Courbet
52d382488f [X86][NFC] Add more tests for memset. 
llvm-svn: 348465
 2018-12-06 08:48:06 +00:00