Rename local var.

Author: Prabhuk

llvm/lib/Target/X86/X86ExpandPseudo.cpp

@@ -301,8 +301,9 @@ bool X86ExpandPseudo::expandMI(MachineBasicBlock &MBB,
       X86FL->emitSPUpdate(MBB, MBBI, DL, Offset, /*InEpilogue=*/true);
     }
 
+    // Use this predicate to set REX prefix for X86_64 targets.
+    bool IsX64 = STI->isTargetWin64() || STI->isTargetUEFI64();
     // Jump to label or value in register.
-    bool IsWinOrUEFI64 = STI->isTargetWin64() || STI->isTargetUEFI64();
     if (Opcode == X86::TCRETURNdi || Opcode == X86::TCRETURNdicc ||
         Opcode == X86::TCRETURNdi64 || Opcode == X86::TCRETURNdi64cc) {
       unsigned Op;
@@ -339,17 +340,16 @@ bool X86ExpandPseudo::expandMI(MachineBasicBlock &MBB,
       }
 
     } else if (Opcode == X86::TCRETURNmi || Opcode == X86::TCRETURNmi64) {
-      unsigned Op =
-          (Opcode == X86::TCRETURNmi)
-              ? X86::TAILJMPm
-              : (IsWinOrUEFI64 ? X86::TAILJMPm64_REX : X86::TAILJMPm64);
+      unsigned Op = (Opcode == X86::TCRETURNmi)
+                        ? X86::TAILJMPm
+                        : (IsX64 ? X86::TAILJMPm64_REX : X86::TAILJMPm64);
       MachineInstrBuilder MIB = BuildMI(MBB, MBBI, DL, TII->get(Op));
       for (unsigned i = 0; i != X86::AddrNumOperands; ++i)
         MIB.add(MBBI->getOperand(i));
     } else if (Opcode == X86::TCRETURNri64) {
       JumpTarget.setIsKill();
       BuildMI(MBB, MBBI, DL,
-              TII->get(IsWinOrUEFI64 ? X86::TAILJMPr64_REX : X86::TAILJMPr64))
+              TII->get(IsX64 ? X86::TAILJMPr64_REX : X86::TAILJMPr64))
           .add(JumpTarget);
     } else {
       JumpTarget.setIsKill();