Remove SegOvrBits from X86 TSFlags since they weren't being used.

llvm-svn: 198588

1 files changed, 13 insertions, 23 deletions

diff --git a/llvm/lib/Target/X86/X86CodeEmitter.cpp b/llvm/lib/Target/X86/X86CodeEmitter.cpp
index 0d3989d8510..072996679bc 100644
--- a/llvm/lib/Target/X86/X86CodeEmitter.cpp
+++ b/llvm/lib/Target/X86/X86CodeEmitter.cpp
@@ -774,29 +774,19 @@ template<class CodeEmitter>
 void Emitter<CodeEmitter>::emitSegmentOverridePrefix(uint64_t TSFlags,
                                                  int MemOperand,
                                                  const MachineInstr &MI) const {
-  switch (TSFlags & X86II::SegOvrMask) {
-    default: llvm_unreachable("Invalid segment!");
-    case 0:
-      // No segment override, check for explicit one on memory operand.
-      if (MemOperand != -1) {   // If the instruction has a memory operand.
-        switch (MI.getOperand(MemOperand+X86::AddrSegmentReg).getReg()) {
-          default: llvm_unreachable("Unknown segment register!");
-          case 0: break;
-          case X86::CS: MCE.emitByte(0x2E); break;
-          case X86::SS: MCE.emitByte(0x36); break;
-          case X86::DS: MCE.emitByte(0x3E); break;
-          case X86::ES: MCE.emitByte(0x26); break;
-          case X86::FS: MCE.emitByte(0x64); break;
-          case X86::GS: MCE.emitByte(0x65); break;
-        }
-      }
-      break;
-    case X86II::FS:
-      MCE.emitByte(0x64);
-      break;
-    case X86II::GS:
-      MCE.emitByte(0x65);
-      break;
+  if (MemOperand < 0)
+    return; // No memory operand
+
+  // Check for explicit segment override on memory operand.
+  switch (MI.getOperand(MemOperand+X86::AddrSegmentReg).getReg()) {
+  default: llvm_unreachable("Unknown segment register!");
+  case 0: break;
+  case X86::CS: MCE.emitByte(0x2E); break;
+  case X86::SS: MCE.emitByte(0x36); break;
+  case X86::DS: MCE.emitByte(0x3E); break;
+  case X86::ES: MCE.emitByte(0x26); break;
+  case X86::FS: MCE.emitByte(0x64); break;
+  case X86::GS: MCE.emitByte(0x65); break;
   }
 }