Chris Lattner f9d95c8835 Fix two problems in SelectionDAGLegalize::ExpandBUILD_VECTOR's handling ... of BUILD_VECTORS that only have two unique elements: 1. The previous code was nondeterminstic, because it walked a map in SDOperand order, which isn't determinstic. 2. The previous code didn't handle the case when one element was undef very well. Now we ensure that the generated shuffle mask has the undef vector on the RHS (instead of potentially being on the LHS) and that any elements that refer to it are themselves undef. This allows us to compile CodeGen/X86/vec_set-9.ll into: _test3: movd %rdi, %xmm0 punpcklqdq %xmm0, %xmm0 ret instead of: _test3: movd %rdi, %xmm1 #IMPLICIT_DEF %xmm0 punpcklqdq %xmm1, %xmm0 ret ... saving a register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48060 91177308-0d34-0410-b5e6-96231b3b80d8		2008-03-09 00:29:42 +00:00
..
Analysis	Add Hybrid Cycle Detection to Andersen's analysis.	2008-03-05 19:31:47 +00:00
Archive	Add alias with non-external aliasee to the list of exported symbols of the library.	2008-03-04 20:15:35 +00:00
AsmParser	regenerate.	2008-03-03 18:58:47 +00:00
Bitcode	Add an unwind_to field to basic blocks, making them Users instead of Values.	2008-03-02 02:48:09 +00:00
CodeGen	Fix two problems in SelectionDAGLegalize::ExpandBUILD_VECTOR's handling	2008-03-09 00:29:42 +00:00
Debugger	Remove attribution from file headers, per discussion on llvmdev.	2007-12-29 20:36:04 +00:00
ExecutionEngine	Load the symbols first so that the interpreter constructor can find them when	2008-03-08 02:49:45 +00:00
Linker	Clarify some important bits	2008-03-07 18:34:50 +00:00
Support	Fix a typo. It's causing consumer-typeset to miscompile. Perhaps more.	2008-03-07 22:39:49 +00:00
System	Stub out a Path::GetMainExecutable call to find the path to the	2008-03-03 02:55:43 +00:00
Target	1) Improve comments.	2008-03-08 22:59:52 +00:00
Transforms	Not all users of a BB are Instructions any more.	2008-03-08 07:48:41 +00:00
VMCore	Remove unused runPass methods.	2008-03-08 01:43:56 +00:00
Makefile	remove attribution from lib Makefiles.	2007-12-29 20:09:26 +00:00