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llvm-mirror/test/Transforms
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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
..
ADCE Try to eliminate the use of the 'unwind' instruction. 2011-09-02 22:41:11 +00:00
ArgumentPromotion fix PR8932, a case where arg promotion could infinitely promote. 2011-01-16 08:09:24 +00:00
BlockPlacement Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
BranchFolding Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
CodeExtractor Update this test to the new EH model. 2011-09-20 22:29:43 +00:00
CodeGenPrepare Roll r127459 back in: 2011-03-11 21:52:04 +00:00
ConstantMerge Teach the ConstantMerge pass about alignment. Fixes PR10514! 2011-07-27 19:47:34 +00:00
ConstProp Manually upgrade the test suite to specify the flag to cttz and ctlz. 2011-12-12 11:59:10 +00:00
CorrelatedValuePropagation Test for lazy value info's ability to prove the absense of NULLs in pointers. 2011-01-16 21:57:20 +00:00
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 Add test for r127138. 2011-03-07 21:28:14 +00:00
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 Remove the old tail duplication pass. It is not used and is unable to update 2011-08-30 23:03:45 +00:00
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 remove asmparser support for the old getresult instruction, which has been subsumed by extractvalue. 2011-06-17 06:57:15 +00:00
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 Introduce "expect" intrinsic instructions. 2011-07-06 18:22:43 +00:00
LowerInvoke Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
LowerSwitch Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
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 Add file. 2011-08-19 21:21:20 +00:00
PruneEH Update more tests to the new EH scheme. 2011-08-31 21:04:11 +00:00
Reassociate Remove empty test. 2011-08-02 02:47:45 +00:00
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 fix PR10286, a problem with the .ll printer handling block addresses that are out-of-scope. 2011-08-03 06:15:41 +00:00
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 Remove the old tail duplication pass. It is not used and is unable to update 2011-08-30 23:03:45 +00:00