Chandler Carruth 424b2b0093 [vectorizer] Teach the loop vectorizer's unroller to only unroll by ... powers of two. This is essentially always the correct thing given the impact on alignment, scaling factors that can be used in addressing modes, etc. Also, fix the management of the unroll vs. small loop cost to more accurately model things with this world. Enhance a test case to actually exercise more of the unroll machinery if using synthetic constants rather than a specific target model. Before this change, with the added flags this test will unroll 3 times instead of either 2 or 4 (the two sensible answers). While I don't expect this to make a huge difference, if there are lots of loops sitting right on the edge of hitting the 'small unroll' factor, they might change behavior. However, I've benchmarked moving the small loop cost up and down in many various ways and by a huge factor (2x) without seeing more than 0.2% code size growth. Small adjustments such as the series that led up here have led to about 1% improvement on some benchmarks, but it is very close to the noise floor so I mostly checked that nothing regressed. Let me know if you see bad behavior on other targets but I don't expect this to be a sufficiently dramatic change to trigger anything. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200213 91177308-0d34-0410-b5e6-96231b3b80d8		2014-01-27 11:12:24 +00:00
..
ADT	Roll back the ConstStringRef change for now	2014-01-27 05:24:39 +00:00
Analysis	Teach SCEV to handle more cases of 'and X, CST', specifically where CST is any number of contiguous 1 bits in a row, with any number of leading and trailing 0 bits.	2014-01-27 10:04:03 +00:00
AsmParser	Move the LLVM IR asm writer header files into the IR directory, as they	2014-01-07 12:34:26 +00:00
Bitcode	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
CodeGen	Revert "Revert "Add Constant Hoisting Pass" (r200034)"	2014-01-25 02:02:55 +00:00
Config	Remove the test for endianness in configure.ac and regenerate.	2014-01-09 01:09:57 +00:00
DebugInfo	llvm-dwarfdump: type unit dwo support	2014-01-09 05:08:24 +00:00
ExecutionEngine	Add target analysis passes to the codegen pipeline for MCJIT.	2014-01-23 19:23:28 +00:00
IR	MIPS: mark intrinsics IntrNoMem so all patterns using them are consistent.	2014-01-21 10:41:16 +00:00
IRReader
LTO	Adding new LTO APIs to parse metadata nodes and extract linker options and	2014-01-21 18:31:27 +00:00
MC	Construct the MCStreamer before constructing the MCTargetStreamer.	2014-01-26 06:06:37 +00:00
Object	[Sparc] Add support for parsing DW_CFA_GNU_window_save.	2014-01-26 05:13:44 +00:00
Option	Option parsing: support case-insensitive option matching.	2013-08-28 20:04:31 +00:00
Support	[vectorizer] Teach the loop vectorizer's unroller to only unroll by	2014-01-27 11:12:24 +00:00
TableGen	Typo fix.	2014-01-24 23:40:08 +00:00
Target	Add a variable to track whether or not we've used a unique section,	2014-01-23 06:47:25 +00:00
Transforms	[LPM] Make LCSSA a utility with a FunctionPass that applies it to all	2014-01-25 04:07:24 +00:00
AutoUpgrade.h	Debug Info: drop debug info via upgrading path if version number does not match.	2013-12-02 21:29:56 +00:00
CMakeLists.txt
DebugInfo.h	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
DIBuilder.h	typo	2014-01-18 02:12:10 +00:00
GVMaterializer.h	Use error_code in GVMaterializer.	2013-11-05 19:36:34 +00:00
InitializePasses.h	Revert "Revert "Add Constant Hoisting Pass" (r200034)"	2014-01-25 02:02:55 +00:00
InstVisitor.h	Add addrspacecast instruction.	2013-11-15 01:34:59 +00:00
LinkAllIR.h	[cleanup] Move the Dominators.h and Verifier.h headers into the IR	2014-01-13 09:26:24 +00:00
LinkAllPasses.h	Revert "Revert "Add Constant Hoisting Pass" (r200034)"	2014-01-25 02:02:55 +00:00
Linker.h	Add a 'deleteModule' method to the Linker class.	2013-10-16 08:59:57 +00:00
Pass.h
PassAnalysisSupport.h
PassManager.h	Move the old pass manager infrastructure into a legacy namespace and	2013-11-09 12:26:54 +00:00
PassRegistry.h	Re-sort all of the includes with ./utils/sort_includes.py so that	2014-01-07 11:48:04 +00:00
PassSupport.h	[opt][PassInfo] Allow opt to run passes that need target machine.	2014-01-16 21:44:34 +00:00