Owen Anderson 7a0201c6a6 Remove an InstCombine that transformed patterns like (x * uitofp i1 y) to (select y, x, 0.0) when the multiply has fast math flags set. ... While this might seem like an obvious canonicalization, there is one subtle problem with it. The result of the original expression is undef when x is NaN (remember, fast math flags), but the result of the select is always defined when x is NaN. This means that the new expression is strictly more defined than the original one. One unfortunate consequence of this is that the transform is not reversible! It's always legal to make increase the defined-ness of an expression, but it's not legal to reduce it. Thus, targets that prefer the original form of the expression cannot reverse the transform to recover it. Another way to think of it is that the transform has lost source-level information (the fast math flags), which is undesirable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215825 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-17 03:51:29 +00:00
..
Analysis	Add @llvm.assume, lowering, and some basic properties	2014-07-25 21:13:35 +00:00
Assembler	IR: Don't add inbounds to GEPs of extern_weak variables	2014-08-16 01:54:32 +00:00
Bindings	[OCaml] Add Llvm.{string_of_const,const_element}.	2014-08-03 23:54:22 +00:00
Bitcode	BitcodeReader: Only create one basic block for each blockaddress	2014-08-16 01:54:37 +00:00
BugPoint	llvm/test/BugPoint/compile-custom.ll: Use explicit %python to invoke a test script, compile-custom.ll.py, for shebang-incapable hosts.	2014-07-11 14:44:10 +00:00
CodeGen	llvm/test/CodeGen/X86/fmul-combines.ll: Appease Windows x64. <4 x float> is passed by stack.	2014-08-16 22:28:37 +00:00
DebugInfo	Revert several FastISel commits to track down a buildbot error.	2014-08-14 19:56:28 +00:00
ExecutionEngine	Add missing Interpreter intrinsic lowering for sin, cos and ceil	2014-08-08 15:00:12 +00:00
Feature	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
FileCheck	FileCheck: Add a flag to allow checking empty input	2014-08-07 18:40:37 +00:00
Instrumentation	Revert r215415 which causse MSan to crash on a great deal of C++ code.	2014-08-13 09:19:39 +00:00
Integer
JitListener
Linker	Set comdats when lazily linking functions.	2014-08-15 20:17:08 +00:00
LTO	Change the default input for llvm-nm to be a.out instead of standard input	2014-06-23 20:27:53 +00:00
MC	arm asm: Let .fpu enable instructions, PR20447.	2014-08-16 05:37:51 +00:00
Object	pr20589: Fix duplicated arch flag.	2014-08-08 16:18:29 +00:00
Other	Don't internalize all but main by default.	2014-08-05 20:10:38 +00:00
TableGen	llvm/test/TableGen/*Foreach*.td: Remove XFAIL:vg_leak. They have not been failing since r215176.	2014-08-12 14:06:21 +00:00
tools	Make the test a bit more strict.	2014-08-12 15:55:27 +00:00
Transforms	Remove an InstCombine that transformed patterns like (x * uitofp i1 y) to (select y, x, 0.0) when the multiply has fast math flags set.	2014-08-17 03:51:29 +00:00
Unit	Let test/Unit/lit.cfg add config.shlibdir to $PATH on DLL platforms like cygming.	2014-07-04 05:11:55 +00:00
Verifier	Use "weak alias" instead of "alias weak"	2014-07-30 22:51:54 +00:00
YAMLParser
.clang-format
CMakeLists.txt	Rename llvm-uselistorder => verify-uselistorder	2014-07-30 17:11:27 +00:00
lit.cfg	Temporarily Revert "Nuke the old JIT." as it's not quite ready to	2014-08-07 22:02:54 +00:00
lit.site.cfg.in	Add missing Interpreter intrinsic lowering for sin, cos and ceil	2014-08-08 15:00:12 +00:00
Makefile	Delete support for AuroraUX.	2014-08-14 15:15:09 +00:00
Makefile.tests
TestRunner.sh