Chandler Carruth 6bb093bbe7 [x86] Rewrite a core part of the new vector shuffle lowering to handle ... one pesky test case correctly. This test case caused the old code to infloop occilating between solving the low-half and the high-half. The 'side balancing' part of single-input v8 shuffle lowering didn't handle the one pattern which can cause it to occilate. Fortunately the fuzz testing found this case. Unfortuately it was *terrible* to handle. I'm really sorry for the amount and density of the code here, I'd love suggestions on how to simplify it. I feel like there *must* be a simpler form here, but after a lot of days I've not found it. This is the only one I've found that even works. I've added the one pesky test case along with some nice comments explaining the core problem that we have to solve here. So far this has survived approximately 32k test cases. More strenuous fuzzing commencing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215519 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-13 01:25:45 +00:00
..
Analysis	In LVI(Lazy Value Info), originally value on a BB can only be caculated once,	2014-08-11 05:02:04 +00:00
AsmParser	Remove dead code in condition	2014-08-05 18:22:58 +00:00
Bitcode	BitcodeReader: Fix non-determinism in use-list order	2014-08-05 17:49:48 +00:00
CodeGen	[PowerPC] Implement PPCTargetLowering::getTgtMemIntrinsic	2014-08-13 01:15:40 +00:00
DebugInfo
ExecutionEngine	[MCJIT] Simplify immediate decoding code in the RuntimeDyldMachO hierarchy.	2014-08-08 23:12:22 +00:00
IR	Don't upgrade global constructors when reading bitcode	2014-08-12 16:46:37 +00:00
IRReader	Update the MemoryBuffer API to use ErrorOr.	2014-07-06 17:43:13 +00:00
LineEditor
Linker	Don't upgrade global constructors when reading bitcode	2014-08-12 16:46:37 +00:00
LTO	Don't internalize all but main by default.	2014-08-05 20:10:38 +00:00
MC	MC: Diagnose an unexpected token in COFF .section instead of asserting	2014-08-11 18:34:43 +00:00
Object	AArch64: add support for dynamic-loader relocations	2014-08-11 10:10:27 +00:00
Option
ProfileData	Coverage: add HasCodeBefore flag to a mapping region.	2014-08-04 18:00:51 +00:00
Support	ADT: remove MinGW32 and Cygwin OSType enum	2014-08-09 23:12:20 +00:00
TableGen	[tablegen] - Eliminate memory leaks in TGParser.cpp	2014-08-08 00:29:54 +00:00
Target	[x86] Rewrite a core part of the new vector shuffle lowering to handle	2014-08-13 01:25:45 +00:00
Transforms	Allwo bitcast + struct GEP transform to work with addrspacecast	2014-08-12 19:46:13 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile