assert(0) -> LLVM_UNREACHABLE.
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75379 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCCodeEmitter.cpp b/lib/Target/PowerPC/PPCCodeEmitter.cpp
index c191f65..4943e5c 100644
--- a/lib/Target/PowerPC/PPCCodeEmitter.cpp
+++ b/lib/Target/PowerPC/PPCCodeEmitter.cpp
@@ -181,7 +181,7 @@
         assert(MovePCtoLROffset && "MovePCtoLR not seen yet?");
       }
       switch (MI.getOpcode()) {
-      default: MI.dump(); assert(0 && "Unknown instruction for relocation!");
+      default: MI.dump(); LLVM_UNREACHABLE("Unknown instruction for relocation!");
       case PPC::LIS:
       case PPC::LIS8:
       case PPC::ADDIS: