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Roman Lebedev a018732b13 [DagCombiner] Not all 'andn''s work with immediates.
Summary:
Split off from D46031.

In masked merge case, this degrades IPC by decreasing instruction count.
{F6108777}
The next patch should be able to recover and improve this.

This also affects the transform @spatel have added in D27489 / rL289738,
and the test coverage for X86 was missing.
But after i have added it, and looked at the changes in MCA, i'm somewhat confused.
{F6093591} {F6093592} {F6093593}
I'd say this regression is an improvement, since `IPC` increased in that case?

Reviewers: spatel, craig.topper

Reviewed By: spatel

Subscribers: andreadb, llvm-commits, spatel

Differential Revision: https://reviews.llvm.org/D46493

llvm-svn: 331684
2018-05-07 21:52:11 +00:00
bindings [bindings/go] Add Go bindings for volatile loads/stores 2018-05-04 15:14:00 +00:00
cmake [Support] Support building LLVM for Fuchsia 2018-05-03 01:38:49 +00:00
docs [XRay][compiler-rt+docs] Introduce __xray_log_init_mode(...). 2018-05-04 06:01:12 +00:00
examples s/LLVM_ON_WIN32/_WIN32/, llvm 2018-04-29 00:45:03 +00:00
include [NFC] Fix typo in variable name. 2018-05-07 13:26:47 +00:00
lib [DagCombiner] Not all 'andn''s work with immediates. 2018-05-07 21:52:11 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Enable warnings for runtimes 2018-04-27 15:10:50 +00:00
test [DagCombiner] Not all 'andn''s work with immediates. 2018-05-07 21:52:11 +00:00
tools [llvm-rc] Fix build: missing 'override'. 2018-05-07 21:06:53 +00:00
unittests Re-land r331622 "[llvm-exegesis] Add a library to cluster benchmark results." 2018-05-07 09:09:48 +00:00
utils [globalisel] Update GlobalISel emitter to match new representation of extending loads 2018-05-05 20:53:24 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy
.gitattributes [MC] Fix regression tests on Windows when git “core.autocrlf” is set to true. 2017-11-17 21:59:43 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt Remove LLVM_INSTALL_CCTOOLS_SYMLINKS 2018-04-24 15:41:02 +00:00
CODE_OWNERS.TXT [CODE_OWNERS] Update my email address. 2018-04-23 19:09:49 +00:00
configure
CREDITS.TXT Update my email address and description. 2018-04-29 01:13:57 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00

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