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4 Commits

Author SHA1 Message Date
Craig Topper
2262613532 [X86] Remove isel patterns for ADCX instruction 
There's no advantage to this instruction unless you need to avoid touching other flag bits. It's encoding is longer, it can't fold an immediate, it doesn't write all the flags.

I don't think gcc will generate this instruction either.

Fixes PR38852.

Differential Revision: https://reviews.llvm.org/D51754

llvm-svn: 342059
 2018-09-12 15:47:34 +00:00
Craig Topper
51e11788a4 [X86] Use regular expressions to make test immune to register allocation changes. 
llvm-svn: 341676
 2018-09-07 16:58:36 +00:00
Simon Pilgrim
996f9b4cad [X86] Add subborrow stack folding tests 
llvm-svn: 295496
 2017-02-17 21:16:24 +00:00
Simon Pilgrim
4ba5969224 [X86][ADX] Added memory folding patterns and stack folding tests 
llvm-svn: 254844
 2015-12-05 07:27:50 +00:00