Andrew Trick 22d20c218a Adding IV chain generation to LSR. ... After collecting chains, check if any should be materialized. If so, hide the chained IV users from the LSR solver. LSR will only solve for the head of the chain. GenerateIVChains will then materialize the chained IV users by computing the IV relative to its previous value in the chain. In theory, chained IV users could be exposed to LSR's solver. This would be considerably complicated to implement and I'm not aware of a case where we need it. In practice it's more important to intelligently prune the search space of nontrivial loops before running the solver, otherwise the solver is often forced to prune the most optimal solutions. Hiding the chained users does this well, so that LSR is more likely to find the best IV for the chain as a whole. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147801 91177308-0d34-0410-b5e6-96231b3b80d8		2012-01-09 21:18:52 +00:00
..
Analysis	Update language check. Do not ignore DW_LANG_Python.	2012-01-09 17:49:47 +00:00
Archive	Support/FileSystem: Add file_magic and move a vew clients over to it.	2011-12-13 23:17:12 +00:00
AsmParser	Removes unused field TheError from LLLexer.	2011-12-21 10:02:45 +00:00
Bitcode	Materialize functions whose basic blocks are used by global variables. Fixes	2012-01-02 07:49:53 +00:00
CodeGen	Avoid eraseing copies from a reserved register unless the definition can be	2012-01-08 19:52:28 +00:00
DebugInfo	Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch	2011-12-20 02:50:00 +00:00
ExecutionEngine	Fix typo in string	2012-01-06 07:49:17 +00:00
Linker	Link symbols with different visibilities according to the rules in the	2012-01-05 23:02:01 +00:00
MC	Don't print an unused label before .cfi_endproc.	2012-01-09 00:17:29 +00:00
Object	Remove unused variables.	2011-12-25 01:20:19 +00:00
Support	revert r147542 after comments from Joerg Sonnenberger	2012-01-05 18:28:46 +00:00
TableGen	TableGen: add a comment	2011-12-22 23:16:09 +00:00
Target	Split AsmParser into two components - AsmParser and AsmParserVariant	2012-01-09 19:13:28 +00:00
Transforms	Adding IV chain generation to LSR.	2012-01-09 21:18:52 +00:00
VMCore	generalize LLVMContext::emitError to take a twine instead of a StringRef.	2012-01-03 23:47:05 +00:00
CMakeLists.txt
LLVMBuild.txt	LLVMBuild: Introduce a common section which currently has a list of the	2011-12-12 22:45:54 +00:00
Makefile