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llvm-mirror/lib/CodeGen/SelectionDAG
Owen Anderson 05f809efff Fix a truly heinous bug in DAGCombine related to AssertZext.
If we have a chain of zext -> assert_zext -> zext -> use, the first zext would get simplified away because of the later zext, and then the later zext would get simplified away because of the assert.  The solution is to teach SimplifyDemandedBits that assert_zext demands all of the high bits of its input, rather than only those demanded by its users.  No testcase because the only example I have manifests as llvm-gcc miscompiling LLVM, and I haven't found a smaller case that reproduces this problem.
Fixes <rdar://problem/10063365>.

llvm-svn: 139059
2011-09-03 00:26:49 +00:00
..
CMakeLists.txt Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
DAGCombiner.cpp Roll back the rest of r126557. It's a hack that will break in some obscure cases. 2011-08-19 22:39:31 +00:00
FastISel.cpp FastISel: avoid function calls between the materialization of the constant and its use. 2011-08-18 22:06:10 +00:00
FunctionLoweringInfo.cpp Add the support in code-gen for the landingpad instruction lowering. 2011-08-17 21:56:44 +00:00
InstrEmitter.cpp Follow up to r138791. 2011-08-30 19:09:48 +00:00
InstrEmitter.h - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 2011-06-28 19:10:37 +00:00
LegalizeDAG.cpp Revert r131152, r129796, r129761. This code is currently considered 2011-09-01 23:07:08 +00:00
LegalizeFloatTypes.cpp Misc cleanup; addresses Duncan's comments on r138877. 2011-08-31 20:13:26 +00:00
LegalizeIntegerTypes.cpp Misc cleanup; addresses Duncan's comments on r138877. 2011-08-31 20:13:26 +00:00
LegalizeTypes.cpp Misc cleanup; addresses Duncan's comments on r138877. 2011-08-31 20:13:26 +00:00
LegalizeTypes.h Misc cleanup; addresses Duncan's comments on r138877. 2011-08-31 20:13:26 +00:00
LegalizeTypesGeneric.cpp Fill in type legalization for MERGE_VALUES in all the various cases. Patch by Micah Villmow. (No testcase because the issue only showed up in an out-of-tree backend.) 2011-08-31 18:36:04 +00:00
LegalizeVectorOps.cpp [VECTOR-SELECT] 2011-07-14 11:11:14 +00:00
LegalizeVectorTypes.cpp Fill in type legalization for MERGE_VALUES in all the various cases. Patch by Micah Villmow. (No testcase because the issue only showed up in an out-of-tree backend.) 2011-08-31 18:36:04 +00:00
Makefile make -fno-rtti the default unless a directory builds with REQUIRES_RTTI. 2010-01-24 20:43:08 +00:00
ScheduleDAGFast.cpp - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 2011-06-28 19:10:37 +00:00
ScheduleDAGList.cpp Various bits of framework needed for precise machine-level selection 2010-12-24 05:03:26 +00:00
ScheduleDAGRRList.cpp PreRA scheduler should avoid cloning compares. 2011-09-01 00:54:31 +00:00
ScheduleDAGSDNodes.cpp Rename TargetSubtarget to TargetSubtargetInfo for consistency. 2011-07-01 21:01:15 +00:00
ScheduleDAGSDNodes.h The index stored in the RegDefIter is one after the current index. When getting the index, decrement it so that it points to the current element. Fixes an off-by-one bug encountered when trying to make use of MVT::untyped. 2011-06-27 18:34:12 +00:00
SDNodeDbgValue.h Do not lose debug info of an inlined function argument even if the argument is only used through GEPs. 2011-02-18 22:43:42 +00:00
SDNodeOrdering.h Allow 0 as an order number. Don't assign an order to formal arguments. 2009-12-22 21:35:02 +00:00
SelectionDAG.cpp Basic x86 code generation for atomic load and store instructions. 2011-08-24 20:50:09 +00:00
SelectionDAGBuilder.cpp Atomic load/store on ARM/Thumb. 2011-08-26 02:59:24 +00:00
SelectionDAGBuilder.h Basic x86 code generation for atomic load and store instructions. 2011-08-24 20:50:09 +00:00
SelectionDAGISel.cpp Follow up to r138791. 2011-08-30 19:09:48 +00:00
SelectionDAGPrinter.cpp Pass the graph to the DOTGraphTraits.getEdgeAttributes(). 2011-02-27 04:11:03 +00:00
TargetLowering.cpp Fix a truly heinous bug in DAGCombine related to AssertZext. 2011-09-03 00:26:49 +00:00
TargetSelectionDAGInfo.cpp Implement a bunch more TargetSelectionDAGInfo infrastructure. 2010-05-11 17:31:57 +00:00