Craig Topper 10fbe29b93 [X86] Add an override of targetShrinkDemandedConstant to limit the damage that shrinkdemandedbits can do to zext_in_reg operations ...

Summary:
This patch adds an implementation of targetShrinkDemandedConstant that tries to keep shrinkdemandedbits from removing bits that would otherwise have been recognized as a movzx.

We still need a follow patch to stop moving ands across srl if the and could be represented as a movzx before the shift but not after. I think this should help with some of the cases that D42088 ended up removing during isel.

Reviewers: spatel, RKSimon

Reviewed By: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D42265

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323048 91177308-0d34-0410-b5e6-96231b3b80d8

2018-01-20 18:50:09 +00:00

..

Analysis

[InstSimplify] use m_Specific and commutative matcher to reduce code; NFCI

2018-01-19 16:12:55 +00:00

AsmParser

Allow dso_local on ifunc.

2018-01-12 17:03:43 +00:00

BinaryFormat

Simplify.

2017-10-19 01:32:18 +00:00

Bitcode

[NFC] fix trivial typos in comments

2018-01-17 12:29:38 +00:00

CodeGen

[SelectionDAG] Fix codegen of vector stores with non byte-sized elements.

2018-01-20 16:05:10 +00:00

DebugInfo

[DWARFv5] Number the line-table's directory array correctly.

2018-01-18 20:33:35 +00:00

Demangle

Silence a bunch of implicit fallthrough warnings

2017-12-19 22:05:25 +00:00

ExecutionEngine

Fix -Wunused-variable.

2018-01-19 22:56:04 +00:00

Fuzzer

[libFuzzer] Delete llvm/lib/Fuzzer

2017-10-16 20:48:19 +00:00

FuzzMutate

[FuzzMutate] Don't crash when mutator is unable to find operation

2017-12-19 08:52:51 +00:00

IR

CodeGen: handle llvm.used properly for COFF

2018-01-20 00:28:02 +00:00

IRReader

Remove redundant includes from various places.

2017-12-13 21:31:03 +00:00

LineEditor

…

Linker

Fix crash when linking metadata with ODR type uniquing

2018-01-09 18:32:53 +00:00

LTO

Don't drop dso_local in LTO.

2018-01-18 05:38:43 +00:00

MC

[WebAssembly] MC: Start table at offset 1 rather than 0

2018-01-19 18:57:01 +00:00

Object

[COFF] Keep the underscore on exported decorated stdcall functions in MSVC mode

2018-01-20 11:44:32 +00:00

ObjectYAML

[WebAssembly] Add COMDAT support

2018-01-09 23:43:14 +00:00

Option

[Option] For typo '-foo', suggest '--foo'

2018-01-09 19:38:04 +00:00

Passes

Add a pass to generate synthetic function entry counts.

2018-01-09 19:39:35 +00:00

ProfileData

Remove superfluous copies in sample profiling.

2017-12-28 18:10:41 +00:00

Support

Fallback option for colorized output when terminfo isn't available

2018-01-19 17:10:55 +00:00

TableGen

Avoid int to string conversion in Twine or raw_ostream contexts.

2017-12-28 16:58:54 +00:00

Target

[X86] Add an override of targetShrinkDemandedConstant to limit the damage that shrinkdemandedbits can do to zext_in_reg operations

2018-01-20 18:50:09 +00:00

Testing

Force #define GTEST_LANG_CXX11.

2017-10-27 21:12:28 +00:00

ToolDrivers

[COFF] Keep the underscore on exported decorated stdcall functions in MSVC mode

2018-01-20 11:44:32 +00:00

Transforms

[ObjCARC] Do not turn a call to @objc_autoreleaseReturnValue into a call

2018-01-19 23:51:13 +00:00

WindowsManifest

Fix bug 34608 by moving private header out of public header.

2017-09-14 23:01:13 +00:00

XRay

[XRay] Use optimistic logging model for FDR mode

2017-11-21 07:16:57 +00:00

CMakeLists.txt

Moving libFuzzer from LLVM to compiler-rt.

2017-08-21 23:25:12 +00:00

LLVMBuild.txt

Re-apply "Introduce FuzzMutate library"

2017-08-21 22:57:06 +00:00