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Sanjay Patel 04894a4949 [ValueTracking, InstCombine] canonicalize fcmp ord/uno with non-NAN ops to null constants 
This is a preliminary step towards solving the remaining part of PR27145 - IR for isfinite():
https://bugs.llvm.org/show_bug.cgi?id=27145

In order to solve that one more generally, we need to add matching for and/or of fcmp ord/uno
with a constant operand.

But while looking at those patterns, I realized we were missing a canonicalization for nonzero
constants. Rather than limiting to just folds for constants, we're adding a general value
tracking method for this based on an existing DAG helper.

By transforming everything to 0.0, we can simplify the existing code in foldLogicOfFCmps()
and pick up missing vector folds.

Differential Revision: https://reviews.llvm.org/D37427


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312591 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-05 23:13:13 +00:00
bindings Update the Go bindings for r309426 (remove offset from llvm.dbg.value) 2017-07-28 22:44:44 +00:00
cmake Move some CLI utils out of llvm-isel-fuzzer and into the library 2017-09-02 23:43:04 +00:00
docs Fix RST syntax in LangRef for llvm.codeview.annotation intrinsic 2017-09-05 20:26:25 +00:00
examples [ORC] Refactor OrcRemoteTarget code to expose its RPC API, reduce 2017-09-04 20:54:46 +00:00
include [ValueTracking, InstCombine] canonicalize fcmp ord/uno with non-NAN ops to null constants 2017-09-05 23:13:13 +00:00
lib [ValueTracking, InstCombine] canonicalize fcmp ord/uno with non-NAN ops to null constants 2017-09-05 23:13:13 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources In MSVC builds embed a VERSIONINFO resource in our exe and DLL files. 2015-06-12 15:58:29 +00:00
runtimes [CMake][runtimes] Use target specific name for all runtimes targets 2017-09-02 02:28:03 +00:00
test [ValueTracking, InstCombine] canonicalize fcmp ord/uno with non-NAN ops to null constants 2017-09-05 23:13:13 +00:00
tools Fix a use after free. 2017-09-05 23:00:51 +00:00
unittests [ORC] Convert null remote symbols to null JITSymbols. 2017-09-05 22:24:40 +00:00
utils [TableGen] Teach tablegen to allow SDNPCommutable nodes with more than 2 operands. 2017-09-04 03:44:33 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt [cmake] Stop putting the revision info in LLVM_VERSION_STRING 2017-08-29 21:44:21 +00:00
CODE_OWNERS.TXT [ARC] Add ARC backend. 2017-08-24 15:40:33 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in [Sparc] Implement i64 load/store support for 32-bit sparc. 2015-08-10 19:11:39 +00:00
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT [RelTest] Diana is doing both releases now 2017-07-14 08:33:52 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
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Please see the documentation provided in docs/ for further
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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