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a864748284
llvm-6502/test/Transforms
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Chandler Carruth a864748284 Revert the switch of loop-idiom to use the new dependence analysis. 
The new analysis is not yet ready for prime time. It has a *critical*
flawed assumption, and some troubling shortages of testing. Until it's
been hammered into better shape, let's stick with the working code. This
should be easy to revert itself when the analysis is ready.

Fixes PR14241, a miscompile of any memcpy-able loop which uses a pointer
as the induction mechanism. If you have been seeing miscompiles in this
revision range, you really want to test with this backed out. The
results of this miscompile are a bit subtle as they can lead to
downstream passes concluding things are impossible which are in fact
possible.

Thanks to David Blaikie for the majority of the reduction of this
miscompile. I'll be checking in the test case in a non-revert commit.

Revesions reverted here:

r167045: LoopIdiom: Fix a serious missed optimization: we only turned
         top-level loops into memmove.
r166877: LoopIdiom: Add checks to avoid turning memmove into an infinite
         loop.
r166875: LoopIdiom: Recognize memmove loops.
r166874: LoopIdiom: Replace custom dependence analysis with
         DependenceAnalysis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167286 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-02 08:33:25 +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: Commit the rest of the test-case change. 2012-11-01 21:57:27 +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
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 Revert the series of commits starting with r166578 which introduced the 2012-11-01 08:07:29 +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 Add a test case for PR14233. 2012-11-01 10:26:36 +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 Revert the switch of loop-idiom to use the new dependence analysis. 2012-11-02 08:33:25 +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: Preserve NSW, NUW and IsExact flags. 2012-10-31 21:40:39 +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 Remove fixme about unreachable cases from SwitchToLookupTable 2012-10-31 16:15:25 +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