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d1fc849359
llvm-mirror/test/Transforms
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Hal Finkel d1fc849359 BBVectorize: Choose pair ordering to minimize shuffles 
BBVectorize would, except for loads and stores, always fuse instructions
so that the first instruction (in the current source order) would always
represent the low part of the input vectors and the second instruction
would always represent the high part. This lead to too many shuffles
being produced because sometimes the opposite order produces fewer of them.

With this change, BBVectorize tracks the kind of pair connections that form
the DAG of candidate pairs, and uses that information to reorder the pairs to
avoid excess shuffles. Using this information, a future commit will be able
to add VTTI-based shuffle costs to the pair selection procedure. Importantly,
the number of remaining shuffles can now be estimated during pair selection.

There are some trivial instruction reorderings in the test cases, and one
simple additional test where we certainly want to do a reordering to
avoid an unnecessary shuffle.

llvm-svn: 167122
2012-10-31 15:17:07 +00:00
..
ADCE Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
ArgumentPromotion Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
BBVectorize BBVectorize: Choose pair ordering to minimize shuffles 2012-10-31 15:17:07 +00:00
BlockPlacement Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +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 Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
CodeGenPrepare Move load_to_switch.ll to test/CodeGen/SPARC/ 2012-09-19 09:25:03 +00:00
ConstantMerge Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
ConstProp Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
CorrelatedValuePropagation CorrelatedPropagation: BasicBlock::removePredecessor can simplify PHI nodes. If the it's the condition of a SwitchInst, reload it. 2012-09-28 10:42:50 +00:00
DeadArgElim Fix PR14016. 2012-10-09 08:13:15 +00:00
DeadStoreElimination Make this test check the transforms it's actually doing. Also add a test that it 2012-09-25 18:17:38 +00:00
EarlyCSE New EarlyCSE tests for CSE-ing across commutativity. 2012-10-09 16:58:13 +00:00
FunctionAttrs Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
GlobalDCE Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
GlobalOpt GlobalOpt: non-constexpr bitcasts or GEPs can occur even if the global value is only stored once. 2012-09-28 10:01:27 +00:00
GVN Update GVN to support vectors of pointers. 2012-10-24 21:22:30 +00:00
IndVarSimplify Fix SCEV cache invalidation in LCSSA and LoopSimplify. 2012-10-26 17:31:43 +00:00
Inline rename test 2012-09-19 09:22:17 +00:00
InstCombine instcombine: Migrate strto* optimizations 2012-10-31 14:58:26 +00:00
InstSimplify Revert r153521 as it's causing large regressions on the nightly testers. 2012-03-28 18:42:50 +00:00
Internalize Change the internalize pass to internalize all symbols when given an empty 2012-10-26 18:47:48 +00:00
IPConstantProp Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
JumpThreading JumpThreading: when default destination is the destination of some cases in a 2012-09-05 23:45:58 +00:00
LCSSA Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
LICM Set %defaultjit to use MCJIT for PowerPC targets. 2012-10-30 18:07:58 +00:00
LoopDeletion Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
LoopIdiom LCSSA: Add a workaround for another nasty SCEV cache invalidation issue. 2012-10-31 10:01:29 +00:00
LoopRotate LoopRotation: Make the brute force DomTree update more brute force. 2012-09-02 11:57:22 +00:00
LoopSimplify Convert all tests using TCL-style quoting to use shell-style quoting. 2012-07-02 12:47:22 +00:00
LoopStrengthReduce LSR critical edge splitting fix for PR13756. 2012-09-18 17:51:33 +00:00
LoopUnroll getSmallConstantTripMultiple should never return zero. 2012-10-24 19:46:44 +00:00
LoopUnswitch Fix tests that didn't test anything. 2012-09-26 09:51:39 +00:00
LoopVectorize LoopVectorize: Do not vectorize loops with tiny constant trip counts. 2012-10-31 03:31:07 +00:00
LowerAtomic Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
LowerExpectIntrinsic Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
LowerInvoke Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
LowerSwitch PR1255 related changes (case ranges): 2012-05-24 09:33:20 +00:00
Mem2Reg Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
MemCpyOpt In my recent change to avoid use of underaligned memory I didn't notice that 2012-10-04 13:53:21 +00:00
MergeFunc Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
MetaRenamer Review feedback from Duncan Sands. Alphabetize includes and simplify 2012-09-14 19:19:57 +00:00
ObjCARC Detect overflow in the path count computation. rdar://12277446. 2012-09-12 20:45:17 +00:00
PhaseOrdering Add test case for r164850. 2012-09-29 00:12:08 +00:00
PruneEH The normal edge of an invoke is not allowed to branch to a block with a 2012-08-10 20:55:20 +00:00
Reassociate Stop reassociate from looking through expressions of arbitrary complexity. This 2012-07-26 09:26:40 +00:00
ScalarRepl Port the global copy optimization from the SROA pass to InstCombine. 2012-08-21 08:39:44 +00:00
SCCP Fix the remaining TCL-style quotes found in the testsuite. This is 2012-07-02 19:09:46 +00:00
SimplifyCFG Do simple constant propagation in lookup table formation for switches 2012-10-31 13:42:45 +00:00
SimplifyLibCalls instcombine: Migrate strto* optimizations 2012-10-31 14:58:26 +00:00
Sink Enhance the sinking code to handle diamond patterns. Patch by 2012-05-31 08:09:49 +00:00
SROA Fix PR14212: For some strange reason I treated vectors differently from 2012-10-30 20:52:40 +00:00
StripSymbols Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed. 2012-02-16 06:28:33 +00:00
TailCallElim Revert r166407 because it caused analyzer tests to crash and broke self-host bots. 2012-10-22 18:16:14 +00:00
TailDup Convert the uses of '|&' to use '2>&1 |' instead, which works on old 2012-07-02 18:37:59 +00:00