Chandler Carruth 1c49fda408 Fix a miscompile in the DAG combiner. Previously, we would incorrectly ... try to reduce the width of this load, and would end up transforming: (truncate (lshr (sextload i48 <ptr> as i64), 32) to i32) to (truncate (zextload i32 <ptr+4> as i64) to i32) We lost the sext attached to the load while building the narrower i32 load, and replaced it with a zext because lshr always zext's the results. Instead, bail out of this combine when there is a conflict between a sextload and a zext narrowing. The rest of the DAG combiner still optimize the code down to the proper single instruction: movswl 6(...),%eax Which is exactly what we wanted. Previously we read past the end *and* missed the sign extension: movl 6(...), %eax git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169802 91177308-0d34-0410-b5e6-96231b3b80d8		2012-12-11 00:36:57 +00:00
..
CMakeLists.txt	llvm/lib: [CMake] Add explicit dependency to intrinsics_gen.	2012-06-24 13:32:01 +00:00
DAGCombiner.cpp	Fix a miscompile in the DAG combiner. Previously, we would incorrectly	2012-12-11 00:36:57 +00:00
FastISel.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
FunctionLoweringInfo.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
InstrEmitter.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
InstrEmitter.h	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
LegalizeDAG.cpp	LegalizeDAG: Allow type promotion of scalar loads	2012-12-10 21:41:58 +00:00
LegalizeFloatTypes.cpp	Follow the same routine to add target float expansion hook	2012-10-11 07:22:01 +00:00
LegalizeIntegerTypes.cpp	Back out r166591, not sure why this made it through since I cancelled the command. Bleh, sorry about this!	2012-10-24 17:25:11 +00:00
LegalizeTypes.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
LegalizeTypes.h	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
LegalizeTypesGeneric.cpp	Fix big-endian codegen bug in DAGTypeLegalizer::ExpandRes_BITCAST	2012-10-12 15:42:58 +00:00
LegalizeVectorOps.cpp	Mark FP_EXTEND form v2f32 to v2f64 as "expand" for ARM NEON. Patch by Pete Couperus.	2012-11-17 01:52:46 +00:00
LegalizeVectorTypes.cpp	Cleanup recent addition of DAGTypeLegalizer::SplitVecOp_VSELECT	2012-11-29 19:42:09 +00:00
LLVMBuild.txt	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
Makefile
ResourcePriorityQueue.cpp	Simplify code. No functionality change.	2012-12-04 01:00:52 +00:00
ScheduleDAGFast.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
ScheduleDAGRRList.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
ScheduleDAGSDNodes.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
ScheduleDAGSDNodes.h	Add a really faster pre-RA scheduler (-pre-RA-sched=linearize). It doesn't use	2012-10-17 19:39:36 +00:00
ScheduleDAGVLIW.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
SDNodeDbgValue.h	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
SDNodeOrdering.h	Mark unimplemented copy constructors and copy assignment operators as LLVM_DELETED_FUNCTION.	2012-09-18 02:01:41 +00:00
SelectionDAG.cpp	Some enhancements for memcpy / memset inline expansion.	2012-12-10 23:21:26 +00:00
SelectionDAGBuilder.cpp	Fall back to the selection dag isel to select tail calls.	2012-12-11 00:18:02 +00:00
SelectionDAGBuilder.h	Sort includes for all of the .h files under the 'lib' tree. These were	2012-12-04 07:12:27 +00:00
SelectionDAGDumper.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
SelectionDAGISel.cpp	Fall back to the selection dag isel to select tail calls.	2012-12-11 00:18:02 +00:00
SelectionDAGPrinter.cpp	Use the new script to sort the includes of every file under lib.	2012-12-03 16:50:05 +00:00
TargetLowering.cpp	Fix a coding style nit.	2012-12-10 22:00:20 +00:00
TargetSelectionDAGInfo.cpp	Move TargetData to DataLayout.	2012-10-08 16:38:25 +00:00