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6 Commits

Author SHA1 Message Date
paperchalice
60eca674b1
[CodeGen] Port ExpandMemCmp to new pass manager (#74050) 2023-12-13 16:18:24 +08:00
Igor Kirillov
849f963e31
[CodeGen] Improve ExpandMemCmp for more efficient non-register aligned sizes handling (#70469) 
* Enhanced the logic of ExpandMemCmp pass to merge contiguous
subsequences
  in LoadSequence, based on sizes allowed in `AllowedTailExpansions`.
* This enhancement seeks to minimize the number of basic blocks and
produce
  optimized code when using memcmp with non-register aligned sizes.
* Enable this feature for AArch64 with memcmp sizes modulo 8 equal to
  3, 5, and 6.

Reapplication of #69942 after fixing a bug
 2023-10-30 18:40:48 +00:00
Igor Kirillov
deb429e5b0 Revert "[CodeGen] Improve ExpandMemCmp for more efficient non-register aligned sizes handling (#69942)" 
This reverts commit 9bcb30d31813bbdea6b65789f64aed3f0e58d507.
 2023-10-27 14:12:45 +00:00
Igor Kirillov
9bcb30d318
[CodeGen] Improve ExpandMemCmp for more efficient non-register aligned sizes handling (#69942) 
* Enhanced the logic of ExpandMemCmp pass to merge contiguous
subsequences
  in LoadSequence, based on sizes allowed in `AllowedTailExpansions`.
* This enhancement seeks to minimize the number of basic blocks and
produce optimized code when using memcmp with non-register aligned sizes.
* Enable this feature for AArch64 with memcmp sizes modulo 8 equal to
  3, 5, and 6.
 2023-10-27 12:41:08 +01:00
Dmitri Gribenko
2bf8d77453 Revert "Reland "r364412 [ExpandMemCmp][MergeICmps] Move passes out of CodeGen into opt pipeline."" 
This reverts commit r371502, it broke tests
(clang/test/CodeGenCXX/auto-var-init.cpp).

llvm-svn: 371507
 2019-09-10 10:39:09 +00:00
Clement Courbet
612c260ec3 Reland "r364412 [ExpandMemCmp][MergeICmps] Move passes out of CodeGen into opt pipeline." 
With a fix for sanitizer breakage (see explanation in D60318).

llvm-svn: 371502
 2019-09-10 09:18:00 +00:00