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042bee88f3
This patch improves the folding of vector AND nodes into blend operations for targets that feature SSE4.1. A vector AND node where one of the operands is a constant build_vector with elements that are either zero or all-ones can be converted into a blend. This allows for example to simplify the following code: define <4 x i32> @test(<4 x i32> %A, <4 x i32> %B) { %1 = and <4 x i32> %A, <i32 0, i32 0, i32 0, i32 -1> %2 = and <4 x i32> %B, <i32 -1, i32 -1, i32 -1, i32 0> %3 = or <4 x i32> %1, %2 ret <4 x i32> %3 } Before this patch llc (-mcpu=corei7) generated: andps LCPI1_0(%rip), %xmm0, %xmm0 andps LCPI1_1(%rip), %xmm1, %xmm1 orps %xmm1, %xmm0, %xmm0 retq With this patch we generate a single 'vpblendw'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221343 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
CMakeLists.txt | ||
DAGCombiner.cpp | ||
FastISel.cpp | ||
FunctionLoweringInfo.cpp | ||
InstrEmitter.cpp | ||
InstrEmitter.h | ||
LegalizeDAG.cpp | ||
LegalizeFloatTypes.cpp | ||
LegalizeIntegerTypes.cpp | ||
LegalizeTypes.cpp | ||
LegalizeTypes.h | ||
LegalizeTypesGeneric.cpp | ||
LegalizeVectorOps.cpp | ||
LegalizeVectorTypes.cpp | ||
LLVMBuild.txt | ||
Makefile | ||
ResourcePriorityQueue.cpp | ||
ScheduleDAGFast.cpp | ||
ScheduleDAGRRList.cpp | ||
ScheduleDAGSDNodes.cpp | ||
ScheduleDAGSDNodes.h | ||
ScheduleDAGVLIW.cpp | ||
SDNodeDbgValue.h | ||
SelectionDAG.cpp | ||
SelectionDAGBuilder.cpp | ||
SelectionDAGBuilder.h | ||
SelectionDAGDumper.cpp | ||
SelectionDAGISel.cpp | ||
SelectionDAGPrinter.cpp | ||
TargetLowering.cpp | ||
TargetSelectionDAGInfo.cpp |