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Craig Topper 172944c965 [X86] Cleanups and safety checks around the isFNEG
This patch does a few things to start cleaning up the isFNEG function.

-Remove the Op0/Op1 peekThroughBitcast calls that seem unnecessary. getTargetConstantBitsFromNode has its own peekThroughBitcast inside. And we have a separate peekThroughBitcast on the return value.
-Add a check of the scalar size after the first peekThroughBitcast to ensure we haven't changed the element size and just did something like f32->i32 or f64->i64.
-Remove an unnecessary check that Op1's type is floating point after the peekThroughBitcast. We're just going to look for a bit pattern from a constant. We don't care about its type.
-Add VT checks on several places that consume the return value of isFNEG. Due to the peekThroughBitcasts inside, the type of the return value isn't guaranteed. So its not safe to use it to build other nodes without ensuring the type matches the type being used to build the node. We might be able to replace these checks with bitcasts instead, but I don't have a test case so a bail out check seemed better for now.

Differential Revision: https://reviews.llvm.org/D63683

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@364206 91177308-0d34-0410-b5e6-96231b3b80d8
2019-06-24 17:28:26 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings [bindings/go] Add debug information accessors 2019-06-24 16:23:17 +00:00
cmake Specify log level for CMake messages (less stderr) 2019-06-19 15:25:32 +00:00
docs [docs][llvm-nm] Add missing options to documentation 2019-06-24 10:50:49 +00:00
examples Add a HowToUseLLJIT example project. 2019-05-22 21:38:41 +00:00
include GlobalISel: Remove unsigned variant of SrcOp 2019-06-24 16:16:12 +00:00
lib [X86] Cleanups and safety checks around the isFNEG 2019-06-24 17:28:26 +00:00
projects Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
resources
runtimes Setup testing target dependencies for default runtimes 2019-06-11 00:25:57 +00:00
test [X86] Cleanups and safety checks around the isFNEG 2019-06-24 17:28:26 +00:00
tools [sancov] Avoid unnecessary unique_ptr 2019-06-24 10:23:47 +00:00
unittests GlobalISel: Remove unsigned variant of SrcOp 2019-06-24 16:16:12 +00:00
utils [GN] Generation failure caused by trailing space in file name 2019-06-23 23:12:10 +00:00
.arcconfig
.clang-format
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore gitignore: Ignore Qt Creator project configuration files. NFC 2019-06-12 08:28:31 +00:00
CMakeLists.txt build: extract LLVM distribution target handling 2019-06-14 18:28:57 +00:00
CODE_OWNERS.TXT [llvm-mca] Move llvm-mca library to llvm/lib/MCA. 2018-12-17 08:08:31 +00:00
configure
CREDITS.TXT [test commit] Add my name to the CREDITS.TXT 2019-05-27 07:48:28 +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 Testing commit access 2019-02-19 20:38:51 +00:00
RELEASE_TESTERS.TXT Update the list of platforms & archs 2018-12-16 14:47:16 +00:00

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