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// fold (or (shl x, (*ext y)), (srl x, (*ext (sub 32, y)))) -> // (rotl x, y) // fold (or (shl x, (*ext y)), (srl x, (*ext (sub 32, y)))) -> // (rotr x, (sub 32, y)) Example: (x == 0xDEADBEEF and y == 4) (x << 4) | (x >> 28) => 0xEADBEEF0 | 0x0000000D => 0xEADBEEFD (rotl x, 4) => 0xEADBEEFD (rotr x, 28) => 0xEADBEEFD - Fix comment and code for second version. It wasn't using the rot* propertly. // fold (or (shl x, (*ext (sub 32, y))), (srl x, (*ext r))) -> // (rotr x, y) // fold (or (shl x, (*ext (sub 32, y))), (srl x, (*ext r))) -> // (rotl x, (sub 32, y)) (x << 28) | (x >> 4) => 0xD0000000 | 0x0DEADBEE => 0xDDEADBEE (rotl x, 4) => 0xEADBEEFD (rotr x, 28) => (0xEADBEEFD) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55575 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
CallingConvLower.cpp | ||
DAGCombiner.cpp | ||
FastISel.cpp | ||
LegalizeDAG.cpp | ||
LegalizeFloatTypes.cpp | ||
LegalizeIntegerTypes.cpp | ||
LegalizeTypes.cpp | ||
LegalizeTypes.h | ||
LegalizeTypesGeneric.cpp | ||
LegalizeVectorTypes.cpp | ||
Makefile | ||
ScheduleDAG.cpp | ||
ScheduleDAGList.cpp | ||
ScheduleDAGRRList.cpp | ||
SelectionDAG.cpp | ||
SelectionDAGISel.cpp | ||
SelectionDAGPrinter.cpp | ||
TargetLowering.cpp |