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/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
index d9e21b8..67c4258 100644
--- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
+++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
@@ -120,7 +120,7 @@
   case ARM::FSTD:
     NumFSTMGened++;
     return ARM::FSTMD;
-  default: llvm_report_error("Unhandled opcode!");
+  default: LLVM_UNREACHABLE("Unhandled opcode!");
   }
   return 0;
 }
@@ -442,7 +442,7 @@
   case ARM::FLDD: return ARM::FLDMD;
   case ARM::FSTS: return ARM::FSTMS;
   case ARM::FSTD: return ARM::FSTMD;
-  default: llvm_report_error("Unhandled opcode!");
+  default: LLVM_UNREACHABLE("Unhandled opcode!");
   }
   return 0;
 }
@@ -455,7 +455,7 @@
   case ARM::FLDD: return ARM::FLDMD;
   case ARM::FSTS: return ARM::FSTMS;
   case ARM::FSTD: return ARM::FSTMD;
-  default: llvm_report_error("Unhandled opcode!");
+  default: LLVM_UNREACHABLE("Unhandled opcode!");
   }
   return 0;
 }