Andrew Trick db66631fb3 Enable LSR IV Chains with sufficient heuristics. ... These heuristics are sufficient for enabling IV chains by default. Performance analysis has been done for i386, x86_64, and thumbv7. The optimization is rarely important, but can significantly speed up certain cases by eliminating spill code within the loop. Unrolled loops are prime candidates for IV chains. In many cases, the final code could still be improved with more target specific optimization following LSR. The goal of this feature is for LSR to make the best choice of induction variables. Instruction selection may not completely take advantage of this feature yet. As a result, there could be cases of slight code size increase. Code size can be worse on x86 because it doesn't support postincrement addressing. In fact, when chains are formed, you may see redundant address plus stride addition in the addressing mode. GenerateIVChains tries to compensate for the common cases. On ARM, code size increase can be mitigated by using postincrement addressing, but downstream codegen currently misses some opportunities. llvm-svn: 147826		2012-01-10 01:45:08 +00:00
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ADCE	Try to eliminate the use of the 'unwind' instruction.	2011-09-02 22:41:11 +00:00
ArgumentPromotion
BlockPlacement
BranchFolding
CodeExtractor	Update this test to the new EH model.	2011-09-20 22:29:43 +00:00
CodeGenPrepare
ConstantMerge
ConstProp	Manually upgrade the test suite to specify the flag to cttz and ctlz.	2011-12-12 11:59:10 +00:00
CorrelatedValuePropagation
DeadArgElim	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
DeadStoreElimination	Fix infinite loop in DSE when deleting a free in a reachable loop that's also	2011-12-08 22:36:35 +00:00
EarlyCSE	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
FunctionAttrs	Change CaptureTracking to pass a Use* instead of a Value* when a value is	2011-12-28 23:24:21 +00:00
GlobalDCE	remove a test that is using old-style llvm.dbg intrinsics, apparently only	2011-11-27 18:13:47 +00:00
GlobalOpt	PR11705, part 2: globalopt shouldn't put inttoptr/ptrtoint operations into global initializers if there's an implied extension or truncation.	2012-01-05 23:03:32 +00:00
GVN	Fix crasher in GVN due to my recent capture tracking changes.	2011-11-21 19:42:56 +00:00
IndVarSimplify	Extended replaceCongruentPhis to handle mixed phi types.	2012-01-07 01:12:09 +00:00
Inline	Allow inlining of functions with returns_twice calls, if they have the	2011-12-18 20:35:43 +00:00
InstCombine	InstCombine: Teach foldLogOpOfMaskedICmpsHelper that sign bit tests are bit tests.	2012-01-09 17:23:27 +00:00
InstSimplify	Add support for vectors of pointers.	2011-12-05 06:29:09 +00:00
Internalize
IPConstantProp	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
JumpThreading	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
LCSSA	Try to eliminate the use of the 'unwind' instruction.	2011-09-02 22:41:11 +00:00
LICM	Move Instruction::isSafeToSpeculativelyExecute out of VMCore and	2011-12-14 23:49:11 +00:00
LoopDeletion
LoopIdiom	Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit.	2011-09-27 20:39:19 +00:00
LoopRotate
LoopSimplify	Make loop preheader insertion in LoopSimplify handle the case where the loop header is a landing pad correctly (by splitting the landingpad out of the loop header). Make some adjustments to the rest of LoopSimplify to make it clear that the rest of LoopSimplify isn't making bad assumptions about the presence of landing pads. PR11575.	2011-12-15 00:50:34 +00:00
LoopStrengthReduce	Enable LSR IV Chains with sufficient heuristics.	2012-01-10 01:45:08 +00:00
LoopUnroll	Add -unroll-runtime for unrolling loops with run-time trip counts.	2011-12-09 06:19:40 +00:00
LoopUnswitch	Reinstate r146578; it doesn't appear to be the cause of some recent execution-	2011-12-22 21:06:36 +00:00
LowerAtomic	Convert more tests over to the new atomic instructions.	2011-09-26 20:27:49 +00:00
LowerExpectIntrinsic
LowerInvoke
LowerSwitch
Mem2Reg	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
MemCpyOpt	Probably not a good idea to convert a single vector load into a memcpy. We	2011-12-06 00:19:08 +00:00
MergeFunc	Convert to the new EH model.	2011-11-08 00:23:01 +00:00
ObjCARC	It turns out that clang does use pointer-to-function types to	2011-12-14 19:10:53 +00:00
PhaseOrdering
PruneEH
Reassociate
ScalarRepl	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
SCCP	Manually upgrade the test suite to specify the flag to cttz and ctlz.	2011-12-12 11:59:10 +00:00
SimplifyCFG	Fix SpeculativelyExecuteBB to either speculate all or none of the phis	2012-01-05 23:58:56 +00:00
SimplifyLibCalls	Turn cos(-x) into cos(x). Patch by Alexander Malyshev!	2011-12-27 18:25:50 +00:00
Sink	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
StripSymbols
TailCallElim	Upgrade syntax of tests using volatile instructions to use 'load volatile' instead of 'volatile load', which is archaic.	2011-11-27 06:54:59 +00:00
TailDup