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Sanjay Patel 7a0d37b0c0 [ValueTracking] determine sign of 0.0 from select when matching min/max FP 
In PR39475:
https://bugs.llvm.org/show_bug.cgi?id=39475
..we may fail to recognize/simplify fabs() in some cases because we do not 
canonicalize fcmp with a -0.0 operand.

Adding that canonicalization can cause regressions on min/max FP tests, so 
that's this patch: for the purpose of determining whether something is min/max, 
let the value returned by the select determine how we treat a 0.0 operand in the fcmp.

This patch doesn't actually change the -0.0 to +0.0. It just changes the analysis, so 
we don't fail to recognize equivalent min/max patterns that only differ in the 
signbit of 0.0.

Differential Revision: https://reviews.llvm.org/D54001

llvm-svn: 346097
2018-11-04 14:28:48 +00:00
benchmarks Pull google/benchmark library to the LLVM tree 2018-08-28 09:42:41 +00:00
bindings [TI removal] Remove TerminatorInst references from bindings. 2018-10-18 07:40:03 +00:00
cmake Enable -Wimplicit-fallthrough for clang as well as GCC 2018-11-01 20:31:44 +00:00
docs [NFC] Remove some extra characters from docs/LangRef.rst 2018-11-02 15:51:43 +00:00
examples [BuildingAJIT] Update the Ch1 KaleidoscopeJIT class to expose errors to clients. 2018-10-18 00:51:38 +00:00
include [SelectionDAG] Remove special methods for creating *_EXTEND_VECTOR_INREG nodes. Move asserts into getNode. 2018-11-04 02:10:18 +00:00
lib [ValueTracking] determine sign of 0.0 from select when matching min/max FP 2018-11-04 14:28:48 +00:00
projects
resources
runtimes Revert "[CMake] Pass Clang defaults to runtimes builds" 2018-07-13 20:01:55 +00:00
test [ValueTracking] determine sign of 0.0 from select when matching min/max FP 2018-11-04 14:28:48 +00:00
tools [AArch64] [Windows] Misc fixes for llvm-readobj -unwind. 2018-11-02 19:59:08 +00:00
unittests [ValueTracking] determine sign of 0.0 from select when matching min/max FP 2018-11-04 14:28:48 +00:00
utils Refactor the lit configuration files 2018-11-02 17:49:01 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore [git/svn] Ignore Visual Studio's CMakeSettings.json. 2018-10-29 14:51:02 +00:00
CMakeLists.txt [CMake] Fix a missing LLVM_ENABLE_IDE from r344555 2018-10-15 22:36:59 +00:00
CODE_OWNERS.TXT Add owner for llvm-objcopy 2018-08-09 22:05:19 +00:00
configure
CREDITS.TXT [NFC] Add periods to CREDITS.txt (testing git-llvm) 2018-10-26 06:57:02 +00:00
LICENSE.TXT Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. 2018-09-22 01:01:03 +00:00
RELEASE_TESTERS.TXT Remove myself from the release testers list. (NFC) 2018-06-20 21:25:50 +00:00

README.txt 

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

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Please see the documentation provided in docs/ for further
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