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/Sparc/FPMover.cpp b/lib/Target/Sparc/FPMover.cpp
index f72a4c4..0f251de 100644
--- a/lib/Target/Sparc/FPMover.cpp
+++ b/lib/Target/Sparc/FPMover.cpp
@@ -20,6 +20,7 @@
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
 using namespace llvm;
 
 STATISTIC(NumFpDs , "Number of instructions translated");
@@ -75,7 +76,7 @@
       OddReg = OddHalvesOfPairs[i];
       return;
     }
-  assert(0 && "Can't find reg");
+  LLVM_UNREACHABLE("Can't find reg");
 }
 
 /// runOnMachineBasicBlock - Fixup FpMOVD instructions in this MBB.
@@ -108,7 +109,7 @@
       else if (MI->getOpcode() == SP::FpABSD)
         MI->setDesc(TII->get(SP::FABSS));
       else
-        assert(0 && "Unknown opcode!");
+        LLVM_UNREACHABLE("Unknown opcode!");
         
       MI->getOperand(0).setReg(EvenDestReg);
       MI->getOperand(1).setReg(EvenSrcReg);