Chandler Carruth 92ffb676af Disable transforms that introduce calls to exp10*() on Linux due to ... widespread glibc bugs. The glibc implementation of exp10 has a very serious precision bug in version 2.15 (and older versions). This is still very widely used (the current Ubuntu LTS for example uses it) and so it isn't reasonable to make transforms that produce these functions. This fixes many miscompiles introduced when we started transforming pow(10.0, ...) into exp10, and it may have fixed other latent miscompiles where exp10 provided sufficient precision but exp10f did not. This is all really horrible. The primary bug has been fixed for over a year and glibc 2.18 works correctly for the test cases I have, but it will be 2017 before the LTS using 2.15 is no longer supported by Ubuntu (and thus reasonable for folks to be relying on). =[ We're either going to need to live without these optimizations, or find a way to switch behavior more dynamically than using simply the fact that the OS is "Linux". To make matters worse, there appears to be significant testing and fixing of numerous other bugs in the exp10 family of functions right now in glibc. While those haven't been causing problems I've seen in the wild, it gives me concerns that we may need to wait until an even later release of glibc before we can reliably transform code into exp10. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198093 91177308-0d34-0410-b5e6-96231b3b80d8		2013-12-28 02:40:19 +00:00
..
Analysis
Assembler
Bindings	Update the ML test to expect the new string format of getStringRepresentation.	2013-12-19 23:38:09 +00:00
Bitcode	Ensure bitcode encoding of calling conventions stays stable. Patch by Boaz Ouriel.	2013-12-22 07:51:53 +00:00
BugPoint
CodeGen	Teach DAGCombiner how to fold a SIGN_EXTEND_INREG of a BUILD_VECTOR of	2013-12-27 20:20:28 +00:00
DebugInfo	llvm-symbolizer: add --obj flag to specify a single object file that should be symbolized.	2013-12-24 19:33:22 +00:00
ExecutionEngine	Remove empty MCJIT/load-object-a.ll since r196641.	2013-12-07 06:17:10 +00:00
Feature
FileCheck
Instrumentation	[ASan] Fix the tests broken by r198018 to check for private linkage of ASan-generated globals.	2013-12-25 17:06:04 +00:00
Integer
JitListener
Linker
LTO	Resubmit r196544: Apply transformation on OS X 10.9+ and iOS 7.0+: pow(10, x) ―> __exp10(x)	2013-12-12 01:55:04 +00:00
MC	Recognize armv7a and friends as aliases for armv7-a etc. for the purpose	2013-12-26 11:50:28 +00:00
Object	Correct word hyphenations	2013-12-05 05:44:44 +00:00
Other	Removed llvm-cov.test from Other folder.	2013-12-12 20:29:54 +00:00
TableGen	FileCheckize r197869	2013-12-22 03:43:58 +00:00
tools	Teach the llvm-readobj COFF dumper to dump debug line tables from object files	2013-12-19 11:37:14 +00:00
Transforms	Disable transforms that introduce calls to exp10*() on Linux due to	2013-12-28 02:40:19 +00:00
Unit
Verifier	Begin adding docs and IR-level support for the inalloca attribute	2013-12-19 02:14:12 +00:00
YAMLParser	[Support][YAML] Add support for accessing tags and tag handle substitution.	2013-10-18 22:38:04 +00:00
.clang-format
CMakeLists.txt
lit.cfg
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh