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302b728560
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Bjorn Pettersson 302b728560 [ValueTracking] Avoid blind cast from Operator to Instruction 
Summary:
Avoid blind cast from Operator to ExtractElementInst in
computeKnownBitsFromOperator. This resulted in some crashes
in downstream fuzzy testing. Instead we use getOperand directly
on the Operator when accessing the vector/index operands.

Haven't seen any problems with InsertElement and ShuffleVector,
but I believe those could be used in constant expressions as well.
So the same kind of fix as for ExtractElement was also applied for
InsertElement.

When it comes to ShuffleVector we now simply bail out if a dynamic
cast of the Operator to ShuffleVectorInst fails. I've got no
reproducer indicating problems for ShuffleVector, and a fix would be
slightly more complicated as getShuffleDemandedElts is involved.

Reviewers: RKSimon, nikic, spatel, efriedma

Reviewed By: RKSimon

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76564
2020-03-22 14:45:31 +01:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings Add an SDK attribute to DICompileUnit 2020-03-11 14:14:06 -07:00
cmake [CMake] Enable the use of -ffile-prefix-map 2020-03-19 15:14:15 -07:00
docs [CMake] Enable the use of -ffile-prefix-map 2020-03-19 15:14:15 -07:00
examples [ORC] Re-apply 98f2bb44610, enable JITEventListeners in OrcV2, with fixes. 2020-03-19 16:30:08 -07:00
include Delete TargetLoweringObjectFile::Ctx 2020-03-21 22:36:29 -07:00
lib [ValueTracking] Avoid blind cast from Operator to Instruction 2020-03-22 14:45:31 +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 [ValueTracking] Avoid blind cast from Operator to Instruction 2020-03-22 14:45:31 +01:00
tools [obj2yaml] - Simplify and reduce ELFDumper<ELFT>::dumpSections. NFCI. 2020-03-21 18:15:26 +03:00
unittests Revert "[ADT] Implement the Waymarking as an independent utility" 2020-03-21 22:47:17 +02:00
utils [gn build] Port 34fd007aaf8 2020-03-21 20:48:15 +00:00
.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 Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
llvm.spec.in Update structured references to the license to the new license. 2019-01-19 11:30:51 +00:00
LLVMBuild.txt Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

README.txt 

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

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