diff --git a/llvm/lib/Target/Hexagon/HexagonBitSimplify.cpp b/llvm/lib/Target/Hexagon/HexagonBitSimplify.cpp index ab28120ba27a..8ded94d062a3 100644 --- a/llvm/lib/Target/Hexagon/HexagonBitSimplify.cpp +++ b/llvm/lib/Target/Hexagon/HexagonBitSimplify.cpp @@ -1966,11 +1966,10 @@ bool BitSimplification::genExtractHalf(MachineInstr *MI, NewR = MRI.createVirtualRegister(&Hexagon::IntRegsRegClass); BuildMI(B, At, DL, HII.get(Hexagon::A2_zxth), NewR) .addReg(L.Reg, 0, L.Sub); - } else if (!L.Low && Opc != Hexagon::S2_extractu) { + } else if (!L.Low && Opc != Hexagon::S2_lsr_i_r) { NewR = MRI.createVirtualRegister(&Hexagon::IntRegsRegClass); - BuildMI(B, MI, DL, HII.get(Hexagon::S2_extractu), NewR) + BuildMI(B, MI, DL, HII.get(Hexagon::S2_lsr_i_r), NewR) .addReg(L.Reg, 0, L.Sub) - .addImm(16) .addImm(16); } if (NewR == 0) diff --git a/llvm/test/CodeGen/Hexagon/bit-extractu-half.ll b/llvm/test/CodeGen/Hexagon/bit-extractu-half.ll new file mode 100644 index 000000000000..fec4a02d9269 --- /dev/null +++ b/llvm/test/CodeGen/Hexagon/bit-extractu-half.ll @@ -0,0 +1,13 @@ +; RUN: llc -march=hexagon < %s | FileCheck %s +; Pick lsr (in bit-simplification) for extracting high halfword. +; CHECK: lsr{{.*}}#16 + +define i32 @foo(i32 %x) #0 { + %a = call i32 @llvm.hexagon.S2.extractu(i32 %x, i32 16, i32 16) + ret i32 %a +} + +declare i32 @llvm.hexagon.S2.extractu(i32, i32, i32) #0 + +attributes #0 = { nounwind readnone } +