Andrew Trick 10bb82e54f Rewrite SCEV's backedge taken count computation. ... Patch by Michele Scandale! Rewrite of the functions used to compute the backedge taken count of a loop on LT and GT comparisons. I decided to split the handling of LT and GT cases becasue the trick "a > b == -a < -b" in some cases prevents the trip count computation due to the multiplication by -1 on the two operands of the comparison. This issue comes from the conservative computation of value range of SCEVs: taking the negative SCEV of an expression that have a small positive range (e.g. [0,31]), we would have a SCEV with a fullset as value range. Indeed, in the new rewritten function I tried to better handle the maximum backedge taken count computation when MAX/MIN expression are used to handle the cases where no entry guard is found. Some test have been modified in order to check the new value correctly (I manually check them and reasoning on possible overflow the new values seem correct). I finally added a new test case related to the multiplication by -1 issue on GT comparisons. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194116 91177308-0d34-0410-b5e6-96231b3b80d8		2013-11-06 02:08:26 +00:00
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ADCE	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
ArgumentPromotion	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
BBVectorize	Prevent LoopVectorizer and SLPVectorizer running if the target has no vector registers.	2013-09-18 12:43:35 +00:00
BranchFolding
CodeExtractor	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
CodeGenPrepare	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
ConstantMerge	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
ConstProp	Teach ConstantFolding about pointer address spaces	2013-08-20 21:20:04 +00:00
CorrelatedValuePropagation	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
DeadArgElim	Fix a bug in Dead Argument Elimination.	2013-10-09 17:21:44 +00:00
DeadStoreElimination	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
DebugIR	Use right pointer type in DebugIR	2013-09-27 22:26:25 +00:00
EarlyCSE	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
FunctionAttrs	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
GCOVProfiling	Debug Info Testing: update context from empty string to null.	2013-09-08 03:11:54 +00:00
GlobalDCE	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
GlobalOpt	Quote potential shell expansions found in tests	2013-10-28 23:37:45 +00:00
GVN	Fix GVN creating bitcast between address spaces	2013-10-30 19:05:41 +00:00
IndVarSimplify	Rewrite SCEV's backedge taken count computation.	2013-11-06 02:08:26 +00:00
Inline	Rename testing case to use - instead of _.	2013-11-04 18:52:06 +00:00
InstCombine	Fix another constant folding address space place I missed.	2013-11-04 20:46:52 +00:00
InstSimplify	Add a test that large offsets on GEPs on 32 bits targets are handled correctly.	2013-09-28 21:27:49 +00:00
Internalize	Use LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN instead of the "dso list".	2013-10-31 20:51:58 +00:00
IPConstantProp	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
JumpThreading	Don't eliminate a partially redundant load if it's in a landing pad.	2013-10-21 04:09:17 +00:00
LCSSA	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LICM	Debug Info: In DIBuilder, the derived-from field of a DW_TAG_pointer_type	2013-10-05 01:43:03 +00:00
LoopDeletion	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LoopIdiom	Teach loop-idiom about address space pointer sizes	2013-09-11 05:09:42 +00:00
LoopRotate	Debug Info Testing: updated to use NULL instead of "i32 0" in a few fields.	2013-09-06 21:03:58 +00:00
LoopSimplify	UpdatePHINodes in BasicBlockUtils should not crash on duplicate predecessors	2013-10-04 23:41:05 +00:00
LoopStrengthReduce	Fix "existant" typos	2013-10-29 02:35:28 +00:00
LoopUnroll	Implement TTI getUnrollingPreferences for PowerPC	2013-09-11 21:20:40 +00:00
LoopUnswitch	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LoopVectorize	Scalarize select vector arguments when extracted.	2013-11-04 20:36:06 +00:00
LowerAtomic	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LowerExpectIntrinsic	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LowerInvoke	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
LowerSwitch	Revert patches to add case-range support for PR1255.	2013-09-09 19:14:35 +00:00
Mem2Reg	Debug Info: add an identifier field to DICompositeType.	2013-08-26 22:39:55 +00:00
MemCpyOpt	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
MergeFunc	Don't merge tiny functions.	2013-10-01 18:05:30 +00:00
MetaRenamer	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
ObjCARC	[objc-arc] Convert the one directional retain/release relation assert to a conditional check + fail.	2013-11-05 16:02:40 +00:00
PhaseOrdering	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
PruneEH	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
Reassociate	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
Reg2Mem	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
ScalarRepl	Teach scalarrepl about address spaces	2013-10-30 22:54:58 +00:00
SCCP	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
SimplifyCFG	SimplifyCFG: Don't duplicate calls to functions marked noduplicate v2	2013-10-21 20:07:30 +00:00
Sink	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
SLPVectorizer	Add llvm/test/Transforms/SLPVectorizer/ARM/lit.local.cfg. Tests there require ARM in targets.	2013-10-29 02:46:00 +00:00
SROA	SROA: Handle casts involving vectors of pointers and integer scalars.	2013-09-21 20:36:04 +00:00
StripSymbols	Fix a test to not fail for users with my name. :)	2013-08-29 00:41:22 +00:00
StructurizeCFG	StructurizeCFG: Add dependency on LowerSwitch pass	2013-10-02 17:04:59 +00:00
TailCallElim	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
TailDup	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00