Fix typo noticed by Lauro Ramos Venancio, thanks!

llvm-svn: 32223
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index a9d2178..040b480 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -5511,7 +5511,7 @@
         return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
                                      X86::SI, X86::DI, X86::BP, X86::SP, 0);
       else if (VT == MVT::i8)
-        return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
+        return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
       break;
     case 'l':   // INDEX_REGS
       if (VT == MVT::i32)