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Pavel Labath 2e62b40fbd APFloat/x87: Fix string conversion for "unnormal" values (pr35860) 
Summary:
Unnormal values are a feature of some very old x87 processors. We handle
them correctly for the most part -- the only exception was an unnormal
value whose significand happened to be zero. In this case the APFloat
was still initialized as normal number (category = fcNormal), but a
subsequent toString operation would assert because the math would
produce nonsensical values for the zero significand.

During review, it was decided that the correct way to fix this is to
treat all unnormal values as NaNs (as that is what any >=386 processor
will do).

The issue was discovered because LLDB would crash when trying to print
some "long double" values.

Reviewers: skatkov, scanon, gottesmm

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D41868

llvm-svn: 331884
2018-05-09 15:13:45 +00:00
bindings [LLVM-C] Correct types in Go bindings 2018-05-09 06:45:28 +00:00
cmake [CMake] Use CMAKE_OBJCOPY and CMAKE_STRIP to externalize debug info 2018-05-09 00:07:42 +00:00
docs fix path to llvm-cfi-verify unittests in docs 2018-05-09 01:15:06 +00:00
examples s/LLVM_ON_WIN32/_WIN32/, llvm 2018-04-29 00:45:03 +00:00
include Revert "DWARFVerifier: Check "completeness" of .debug_names section" 2018-05-09 12:26:19 +00:00
lib APFloat/x87: Fix string conversion for "unnormal" values (pr35860) 2018-05-09 15:13:45 +00:00
projects [cmake] Support moving debuginfo-tests to llvm/projects 2017-12-12 17:06:08 +00:00
resources
runtimes [CMake] Enable warnings for runtimes 2018-04-27 15:10:50 +00:00
test [LV] Add lit testcase for bitcast problem. NFC 2018-05-09 13:34:57 +00:00
tools Make llvm-cfi-verify CMakeLists.txt formatting more consistent with the rest of LLVM. 2018-05-09 01:07:02 +00:00
unittests APFloat/x87: Fix string conversion for "unnormal" values (pr35860) 2018-05-09 15:13:45 +00:00
utils Remove 'abi-breaking-checks' lit feature. 2018-05-09 12:39:39 +00:00
.arcconfig [llvm] Set up .arcconfig to point to Diffusion L repository 2018-01-12 15:37:41 +00:00
.clang-format
.clang-tidy
.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt Remove LLVM_INSTALL_CCTOOLS_SYMLINKS 2018-04-24 15:41:02 +00:00
CODE_OWNERS.TXT [CODE_OWNERS] Update my email address. 2018-04-23 19:09:49 +00:00
configure
CREDITS.TXT Update my email address and description. 2018-04-29 01:13:57 +00:00
LICENSE.TXT
llvm.spec.in
LLVMBuild.txt
README.txt Test commit access 2017-08-18 02:39:28 +00:00
RELEASE_TESTERS.TXT Update my email addresses, NFC. 2017-10-26 10:16:54 +00:00

README.txt 

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

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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