llvm-project/llvm/lib/CodeGen/SelectionDAG
Sanjoy Das d2db73ba59 [StatepointLowering] Fix bug in allocateStackSlot
allocateStackSlot did not consider the size of the value to be spilled
before deciding to re-use a spill slot.  This was originally okay (since
originally we'd only ever spill pointers), but it became not okay when
we changed our scheme to directly spill vectors of pointers.

While this change fixes the bug pointed out, it has two performance
caveats:

 - It matches spill slot and spillee size exactly, while in theory we
   can spill, e.g., an 8 byte pointer into a 16 byte slot.  This is
   slightly complicated to fix since in the stackmaps section, we report
   the size of the spill slot as the size of the "indirect value"; and
   if they're no longer equivalent, we'll have to keep track of the
   (indirect) value size separately from the stack slot size.

 - It will "spuriously run out" of reusable slots, since we now have an
   second check in the search loop in addition to the availablity
   check (e.g. you had two free scalar slots, and you first ask for a
   vector slot followed by a scalar slot).  I'll fix this in a later
   commit.

llvm-svn: 261336
2016-02-19 17:15:22 +00:00
..
CMakeLists.txt Rename TargetSelectionDAGInfo into SelectionDAGTargetInfo and move it to CodeGen/ 2016-01-27 16:32:26 +00:00
DAGCombiner.cpp [CodeGen] Document and use getConstant's splat-building feature. NFC. 2016-02-15 18:07:29 +00:00
FastISel.cpp [NFC] Replace several manual GEP loops with gep_type_iterator. 2016-01-20 00:26:52 +00:00
FunctionLoweringInfo.cpp Undo spurious change made in r256965 2016-01-07 04:31:35 +00:00
InstrEmitter.cpp [X86] Part 1 to fix x86-64 fp128 calling convention. 2015-12-03 22:02:40 +00:00
InstrEmitter.h [SDAG] Give InstrEmitter hidden visibility 2015-07-01 14:55:10 +00:00
LLVMBuild.txt
LegalizeDAG.cpp LegalizeDAG: Fix ExpandFCOPYSIGN assuming the same type on both inputs 2016-02-19 04:44:19 +00:00
LegalizeFloatTypes.cpp Do not try to use i8 and i16 versions of FP_TO_U/SINT soft float library calls 2015-12-15 12:55:50 +00:00
LegalizeIntegerTypes.cpp [X86] Don't transform X << 1 to X + X during type legalization 2016-01-28 18:20:05 +00:00
LegalizeTypes.cpp Type legalizer for masked gather and scatter intrinsics. 2015-12-15 08:40:41 +00:00
LegalizeTypes.h SelectionDAG: Cleanup integer bin op promotion functions. 2015-12-19 17:18:43 +00:00
LegalizeTypesGeneric.cpp [X86] Part 1 to fix x86-64 fp128 calling convention. 2015-12-03 22:02:40 +00:00
LegalizeVectorOps.cpp [CodeGen] Document and use getConstant's splat-building feature. NFC. 2016-02-15 18:07:29 +00:00
LegalizeVectorTypes.cpp Type legalizer for masked gather and scatter intrinsics. 2015-12-15 08:40:41 +00:00
ResourcePriorityQueue.cpp Fix some comment typos. 2015-08-08 18:27:36 +00:00
SDNodeDbgValue.h Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ScheduleDAGFast.cpp Replace uint16_t with the MCPhysReg typedef in many places. A lot of physical register arrays already use this typedef. 2015-12-05 07:13:35 +00:00
ScheduleDAGRRList.cpp rangify; NFCI 2016-02-03 22:44:14 +00:00
ScheduleDAGSDNodes.cpp Avoid overly large SmallPtrSet/SmallSet 2016-01-30 01:24:31 +00:00
ScheduleDAGSDNodes.h [SelectionDAG] Remove dead code. NFC. 2015-10-15 17:54:06 +00:00
ScheduleDAGVLIW.cpp Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
SelectionDAG.cpp [SelectionDAG] change getConstant() to use the input SDLoc when building splat vectors 2016-02-11 20:21:24 +00:00
SelectionDAGBuilder.cpp Remove uses of builtin comma operator. 2016-02-18 22:09:30 +00:00
SelectionDAGBuilder.h SelectionDAG: Lower some range metadata to AssertZext 2016-02-08 16:28:19 +00:00
SelectionDAGDumper.cpp Avoid overly large SmallPtrSet/SmallSet 2016-01-30 01:24:31 +00:00
SelectionDAGISel.cpp Fix Clang-tidy readability-redundant-control-flow warnings; other minor fixes. 2016-02-02 18:20:45 +00:00
SelectionDAGPrinter.cpp Make the SelectionDAG graph printer use SDNode::PersistentId labels. 2015-10-27 23:09:03 +00:00
SelectionDAGTargetInfo.cpp Rename TargetSelectionDAGInfo into SelectionDAGTargetInfo and move it to CodeGen/ 2016-01-27 16:32:26 +00:00
StatepointLowering.cpp [StatepointLowering] Fix bug in allocateStackSlot 2016-02-19 17:15:22 +00:00
StatepointLowering.h [StatepointLowering] Support of the gc.relocates for invoke statepoints. 2015-05-20 11:37:25 +00:00
TargetLowering.cpp Remove uses of builtin comma operator. 2016-02-18 22:09:30 +00:00