Implement changes from Chris's feedback.
Finish converting lib/Target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75043 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index f436e97..d43a76e 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -257,10 +257,10 @@
   else if (MO.isMBB())
     emitMachineBasicBlock(MO.getMBB(), ARM::reloc_arm_branch);
   else {
-    std::string msg;
-    raw_string_ostream Msg(msg);
-    Msg << "ERROR: Unknown type of MachineOperand: " << MO;
-    llvm_report_error(Msg.str());
+#ifndef NDEBUG
+    cerr << MO;
+#endif
+    llvm_unreachable();
   }
   return 0;
 }
@@ -588,7 +588,7 @@
   unsigned Opcode = MI.getDesc().Opcode;
   switch (Opcode) {
   default:
-    llvm_report_error("ARMCodeEmitter::emitPseudoInstruction");//FIXME:
+    LLVM_UNREACHABLE("ARMCodeEmitter::emitPseudoInstruction");//FIXME:
   case TargetInstrInfo::INLINEASM: {
     // We allow inline assembler nodes with empty bodies - they can
     // implicitly define registers, which is ok for JIT.
@@ -1119,8 +1119,9 @@
 void Emitter<CodeEmitter>::emitBranchInstruction(const MachineInstr &MI) {
   const TargetInstrDesc &TID = MI.getDesc();
 
-  if (TID.Opcode == ARM::TPsoft)
-    llvm_report_error("ARM::TPsoft FIXME"); // FIXME
+  if (TID.Opcode == ARM::TPsoft) {
+    LLVM_UNREACHABLE("ARM::TPsoft FIXME"); // FIXME
+  }
 
   // Part of binary is determined by TableGn.
   unsigned Binary = getBinaryCodeForInstr(MI);