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Simon Pilgrim c21f97c100 [X86][SSE] Handle basic inversion of PTEST/TESTP operands (PR38522) 
PTEST/TESTP sets EFLAGS as:
TESTZ: ZF = (Op0 & Op1) == 0
TESTC: CF = (~Op0 & Op1) == 0
TESTNZC: ZF == 0 && CF == 0

If we are inverting the 0'th operand of a PTEST/TESTP instruction we can adjust the comparisons to correct handle the inversion implicitly.

Additionally, for "TESTZ" (ZF) cases, the allones case, PTEST(X,-1) can be simplified to PTEST(X,X).

We can expand this for the TESTZ(X,~Y) pattern and also handle KTEST/KORTEST in the future.

Differential Revision: https://reviews.llvm.org/D76984
2020-04-01 11:33:28 +01:00
benchmarks
bindings Add an SDK attribute to DICompileUnit 2020-03-11 14:14:06 -07:00
cmake Do export symbols when LLVM_EXPORT_SYMBOLS_FOR_PLUGINS is on. 2020-03-26 09:07:02 +00:00
docs [docs] Make llvm-addr2line documentation more explicit about which 2020-03-31 12:44:45 -07:00
examples [examples] Fixes for BUILD_SHARED_LIBS=on 2020-03-23 15:21:45 -07:00
include [Alignment][NFC] Use Align in SelectionDAG::getMemIntrinsicNode 2020-04-01 09:32:05 +00:00
lib [X86][SSE] Handle basic inversion of PTEST/TESTP operands (PR38522) 2020-04-01 11:33:28 +01:00
projects Add few docs and implementation of strcpy and strcat. 2019-10-04 17:30:54 +00:00
resources
runtimes [runtimes] When COMPILER_RT is enabled, consider SANITIZER prefixes 2020-03-11 14:22:20 -07:00
test [X86][SSE] Handle basic inversion of PTEST/TESTP operands (PR38522) 2020-04-01 11:33:28 +01:00
tools Switch this function to the LLVM variable naming convention, to match the rest of the file. 2020-03-31 13:43:19 -07:00
unittests [VectorUtils][X86] De-templatize scaleShuffleMask and 2 X86 shuffle mask helpers and move their implementation to cpp files 2020-04-01 00:46:48 -07:00
utils [lit] Refine adoption of argparse --version action 2020-03-31 16:02:16 -07:00
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes Fix the "git modified" issue on the preserve-comments-crlf.s. 2019-09-10 12:17:49 +00:00
.gitignore Continue removing llgo. 2020-02-10 10:33:58 -08:00
CMakeLists.txt [cmake] Fix -stripped for umbrella library install targets 2020-03-20 18:46:48 -07:00
CODE_OWNERS.TXT Remove myself from CODE_OWNERS. 2020-02-25 11:59:29 +00:00
configure
CREDITS.TXT Update email address. 2019-07-17 07:02:02 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT

README.txt 

The LLVM Compiler Infrastructure
================================

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Please see the documentation provided in docs/ for further
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