[PATCH] [AArch64 NEON] Fix a bug in implementing register copy bwtween FPR16.

[Kevin Qin]

Hi,

Please review. Thanks.

http://llvm-reviews.chandlerc.com/D2590

Files:
  lib/Target/AArch64/AArch64InstrInfo.cpp

Index: lib/Target/AArch64/AArch64InstrInfo.cpp
===================================================================
--- lib/Target/AArch64/AArch64InstrInfo.cpp
+++ lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -135,9 +135,9 @@
   } else if (AArch64::FPR16RegClass.contains(DestReg, SrcReg)) {
     // The copy of two FPR16 registers is implemented by the copy of two FPR32
     const TargetRegisterInfo *TRI = &getRegisterInfo();
-    unsigned Dst = TRI->getMatchingSuperReg(SrcReg, AArch64::sub_16,
+    unsigned Dst = TRI->getMatchingSuperReg(DestReg, AArch64::sub_16,
                                             &AArch64::FPR32RegClass);
-    unsigned Src = TRI->getMatchingSuperReg(DestReg, AArch64::sub_16,
+    unsigned Src = TRI->getMatchingSuperReg(SrcReg, AArch64::sub_16,
                                             &AArch64::FPR32RegClass);
     BuildMI(MBB, I, DL, get(AArch64::FMOVss), Dst)
       .addReg(Src);
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