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522877813a
llvm-6502/lib/CodeGen/SelectionDAG
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Akira Hatanaka 522877813a [DAGCombine] Fix a bug in MergeConsecutiveStores. 
The bug manifests when there are two loads and two stores chained as follows in
a DAG,

(ld v3f32) -> (st f32) -> (ld v3f32) -> (st f32)

and the stores' values are extracted from the preceding vector loads.

MergeConsecutiveStores would replace the first store in the chain with the
merged vector store, which would create a cycle between the merged store node
and the last load node that appears in the chain.

This commits fixes the bug by replacing the last store in the chain instead.

rdar://problem/20275084

Differential Revision: http://reviews.llvm.org/D8849


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234430 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-08 20:34:53 +00:00
..
CMakeLists.txt [Statepoints 3/4] Statepoint infrastructure for garbage collection: SelectionDAGBuilder 2014-12-02 18:50:36 +00:00
DAGCombiner.cpp [DAGCombine] Fix a bug in MergeConsecutiveStores. 2015-04-08 20:34:53 +00:00
FastISel.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
FunctionLoweringInfo.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
InstrEmitter.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
InstrEmitter.h Remove the uses of getSubtargetImpl from InstrEmitter and remove 2014-10-09 01:35:29 +00:00
LegalizeDAG.cpp [CodeGen] Replace the reused stores' chain for extractelt expansion. 2015-03-09 22:51:05 +00:00
LegalizeFloatTypes.cpp Fix makeLibCall argument (signed) in SoftenFloatRes_XINT_TO_FP function 2015-02-10 23:30:14 +00:00
LegalizeIntegerTypes.cpp LegalizeTypes: Handle shift by 0 in ExpandShiftByConstant. 2015-03-06 01:13:01 +00:00
LegalizeTypes.cpp [PowerPC] Implement readcyclecounter for PPC32 2014-12-02 22:01:00 +00:00
LegalizeTypes.h [SDAG] Move TRUNCATE splitting logic into a helper, and use 2015-03-31 10:20:58 +00:00
LegalizeTypesGeneric.cpp AA metadata refactoring (introduce AAMDNodes) 2014-07-24 12:16:19 +00:00
LegalizeVectorOps.cpp fix typo and 80-col; NFC 2015-03-27 21:45:18 +00:00
LegalizeVectorTypes.cpp [SDAG] Move TRUNCATE splitting logic into a helper, and use 2015-03-31 10:20:58 +00:00
LLVMBuild.txt
Makefile
ResourcePriorityQueue.cpp unique_ptrify ResourcePriorityQueue::ResourceModel 2015-03-03 20:49:08 +00:00
ScheduleDAGFast.cpp Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool> 2014-11-19 07:49:26 +00:00
ScheduleDAGRRList.cpp Fix a bug in SelectionDAG scheduling backtracking code: PR22304. 2015-03-27 03:44:13 +00:00
ScheduleDAGSDNodes.cpp Prefer SmallVector::append/insert over push_back loops. 2015-02-17 15:29:18 +00:00
ScheduleDAGSDNodes.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
ScheduleDAGVLIW.cpp Remove more calls to getSubtargetImpl from the schedulers and 2014-10-09 06:28:06 +00:00
SDNodeDbgValue.h constify the getters in SDNodeDbgValue. 2014-10-13 20:43:47 +00:00
SelectionDAG.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
SelectionDAGBuilder.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
SelectionDAGBuilder.h CodeGen: Assert that inlined-at locations agree 2015-04-03 19:20:26 +00:00
SelectionDAGDumper.cpp CodeGen: Use the new DebugLoc API, NFC 2015-03-30 19:14:47 +00:00
SelectionDAGISel.cpp CodeGen: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:27:40 +00:00
SelectionDAGPrinter.cpp Revert "Introduce a string_ostream string builder facilty" 2014-06-26 22:52:05 +00:00
StatepointLowering.cpp Require a GC strategy be specified for functions which use gc.statepoint 2015-03-27 05:09:33 +00:00
StatepointLowering.h [Statepoints 3/4] Statepoint infrastructure for garbage collection: SelectionDAGBuilder 2014-12-02 18:50:36 +00:00
TargetLowering.cpp [CodeGen] Report error rather than crash when unable to makeLibCall. 2015-03-26 22:46:58 +00:00
TargetSelectionDAGInfo.cpp Have TargetSelectionDAGInfo take a DataLayout initializer rather than 2014-06-06 19:04:48 +00:00