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
..
Analysis	Allow scalar evolution to compute iteration counts for loops with a	2009-05-09 12:32:42 +00:00
Archive
Assembler	Make this test slightly more strict.	2009-04-27 03:05:26 +00:00
Bindings/Ocaml	Nounwind is not valid for function return values.	2009-05-06 13:51:18 +00:00
Bitcode	fix a bitcode reader bug where it can't handle extractelement correctly:	2009-02-03 02:11:28 +00:00
BugPoint	Re-commit r67334 and r67349 with fix.	2009-03-21 18:12:24 +00:00
CodeGen	Factor the code for collecting IV users out of LSR into an IVUsers class,	2009-05-12 02:17:14 +00:00
DebugInfo	Restore minor deletion.	2009-05-04 18:40:41 +00:00
ExecutionEngine	remove a testcase that depends on -debug existing.	2009-03-13 20:31:25 +00:00
Feature	Make MDNode use CallbackVH. Also change MDNode to store Value* instead of	2009-05-10 20:57:05 +00:00
FrontendAda	Adjust this test for recent sroa improvements.	2009-03-12 11:56:12 +00:00
FrontendC	Restore minor deletion.	2009-05-04 18:40:41 +00:00
FrontendC++	Restore minor deletion.	2009-05-04 18:40:41 +00:00
FrontendFortran	These tests are x86 specific.	2009-04-22 10:39:51 +00:00
FrontendObjC	Test for llvm-gcc bug fixed by 70301.	2009-04-28 17:16:30 +00:00
FrontendObjC++	This is an objective-c test, not an objective-c++ one.	2008-10-06 18:42:48 +00:00
Integer	Converted a1.ll to unittests.	2009-03-24 21:36:09 +00:00
lib	Re-commit r67334 and r67349 with fix.	2009-03-21 18:12:24 +00:00
Linker	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
LLVMC	The 'forward_as' property did not use its second argument.	2009-05-06 01:41:19 +00:00
Other	Update call graph after inlining invoke.	2009-03-31 17:36:12 +00:00
Scripts
TableGen	Use .td for tablegen files, not .ll.	2009-05-08 23:01:28 +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
Verifier	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
Makefile	Add more ulimit limits, to catch more kinds of runaway behavior.	2009-04-23 00:28:31 +00:00
Makefile.tests
TestRunner.sh	Fix a bashism in TestRunner.sh.	2008-07-28 18:41:03 +00:00