Dan Gohman 81db61a2e6 Factor the code for collecting IV users out of LSR into an IVUsers class, ... and generalize it so that it can be used by IndVarSimplify. Implement the base IndVarSimplify transformation code using IVUsers. This removes TestOrigIVForWrap and associated code, as ScalarEvolution now has enough builtin overflow detection and folding logic to handle all the same cases, and more. Run "opt -iv-users -analyze -disable-output" on your favorite loop for an example of what IVUsers does. This lets IndVarSimplify eliminate IV casts and compute trip counts in more cases. Also, this happens to finally fix the remaining testcases in PR1301. Now that IndVarSimplify is being more aggressive, it occasionally runs into the problem where ScalarEvolutionExpander's code for avoiding duplicate expansions makes it difficult to ensure that all expanded instructions dominate all the instructions that will use them. As a temporary measure, IndVarSimplify now uses a FixUsesBeforeDefs function to fix up instructions inserted by SCEVExpander. Fortunately, this code is contained, and can be easily removed once a more comprehensive solution is available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71535 91177308-0d34-0410-b5e6-96231b3b80d8		2009-05-12 02:17:14 +00:00
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Analysis	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
Archive	Add the private linkage.	2009-01-15 20:18:42 +00:00
AsmParser	Make MDNode use CallbackVH. Also change MDNode to store Value* instead of	2009-05-10 20:57:05 +00:00
Bitcode	Make MDNode use CallbackVH. Also change MDNode to store Value* instead of	2009-05-10 20:57:05 +00:00
CodeGen	- Record that the debug info is actually used so that the label folder doesn't	2009-05-12 00:06:59 +00:00
CompilerDriver	-write-graph now can be used with -o.	2009-03-27 12:57:14 +00:00
Debugger	Oops...I committed too much.	2009-03-13 04:39:26 +00:00
ExecutionEngine	Rename PaddedSize to AllocSize, in the hope that this	2009-05-09 07:06:46 +00:00
Linker	Add a new "available_externally" linkage type. This is intended	2009-04-13 05:44:34 +00:00
Support	Move helper functions for optimizing division by constant into the APInt	2009-04-30 10:15:35 +00:00
System	Add terminal width detection to llvm::sys::Process. This is needed to	2009-05-11 18:05:52 +00:00
Target	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
Transforms	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
VMCore	Needed #includes. Thanks Fritz van Bommel!	2009-05-10 23:27:41 +00:00
Makefile	Reorganize llvmc code.	2009-03-02 09:01:14 +00:00