Chandler Carruth 21b69296fb [x86] Fix yet another bug in the new vector shuffle lowering's handling ... of widening masks. We can't widen a zeroing mask unless both elements that would be merged are either zeroed or undef. This is the only way to widen a mask if it has a zeroed element. Also clean up the code here by ordering the checks in a more logical way and by using the symoblic values for undef and zero. I'm actually torn on using the symbolic values because the existing code is littered with the assumption that -1 is undef, and moreover that entries '< 0' are the special entries. While that works with the values given to these constants, using the symbolic constants actually makes it a bit more opaque why this is the case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218575 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-28 03:30:25 +00:00
..
Analysis	Ignore annotation function calls in cost computation	2014-09-26 17:48:40 +00:00
AsmParser
Bitcode
CodeGen	[AArch64] Redundant store instructions should be removed as dead code	2014-09-27 17:02:54 +00:00
DebugInfo	Object: BSS/virtual sections don't have contents	2014-09-26 22:32:16 +00:00
ExecutionEngine
IR
IRReader
LineEditor
Linker
LTO
MC	WinCOFFObjectWriter.cpp: make write_uint32_le more efficient	2014-09-28 00:22:27 +00:00
Object	Object: BSS/virtual sections don't have contents	2014-09-26 22:32:16 +00:00
Option
ProfileData	llvm-cov: Combine segments that cover the same location	2014-09-25 00:34:18 +00:00
Support	Fix llvm::huge_valf multiple initializations with Visual C++.	2014-09-27 14:41:29 +00:00
TableGen	Refactoring: raw pointer -> unique_ptr	2014-09-25 19:55:58 +00:00
Target	[x86] Fix yet another bug in the new vector shuffle lowering's handling	2014-09-28 03:30:25 +00:00
Transforms	[IndVar] Don't widen loop compare unless IV user is sign extended.	2014-09-26 20:05:35 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile