Convert assert(0) to llvm_unreachable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index 6e2a8d4..7a0a4e1 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -862,7 +862,7 @@
   switch (Opcode) {
   default: return 0;
   case Instruction::ICmp:
-  case Instruction::FCmp: assert(0 && "Invalid for compares");
+  case Instruction::FCmp: llvm_unreachable("Invalid for compares");
   case Instruction::Call:
     if (Function *F = dyn_cast<Function>(Ops.back()))
       if (canConstantFoldCallTo(F))
@@ -1390,7 +1390,7 @@
           APInt Res;
           bool Overflow;
           switch (F->getIntrinsicID()) {
-          default: assert(0 && "Invalid case");
+          default: llvm_unreachable("Invalid case");
           case Intrinsic::sadd_with_overflow:
             Res = Op1->getValue().sadd_ov(Op2->getValue(), Overflow);
             break;
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index 5cbd15e..405ed31 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -583,8 +583,7 @@
     return DIType(DbgNode).getFilename();
   if (isFile())
     return DIFile(DbgNode).getFilename();
-  assert(0 && "Invalid DIScope!");
-  return StringRef();
+  llvm_unreachable("Invalid DIScope!");
 }
 
 StringRef DIScope::getDirectory() const {
@@ -604,8 +603,7 @@
     return DIType(DbgNode).getDirectory();
   if (isFile())
     return DIFile(DbgNode).getDirectory();
-  assert(0 && "Invalid DIScope!");
-  return StringRef();
+  llvm_unreachable("Invalid DIScope!");
 }
 
 DIArray DICompileUnit::getEnumTypes() const {
diff --git a/lib/Analysis/InstructionSimplify.cpp b/lib/Analysis/InstructionSimplify.cpp
index 6605586..bce7e79 100644
--- a/lib/Analysis/InstructionSimplify.cpp
+++ b/lib/Analysis/InstructionSimplify.cpp
@@ -1595,8 +1595,7 @@
   if (match(RHS, m_Zero())) {
     bool LHSKnownNonNegative, LHSKnownNegative;
     switch (Pred) {
-    default:
-      assert(false && "Unknown ICmp predicate!");
+    default: llvm_unreachable("Unknown ICmp predicate!");
     case ICmpInst::ICMP_ULT:
       return getFalse(ITy);
     case ICmpInst::ICMP_UGE:
@@ -1766,8 +1765,7 @@
         // there.  Use this to work out the result of the comparison.
         if (RExt != CI) {
           switch (Pred) {
-          default:
-            assert(false && "Unknown ICmp predicate!");
+          default: llvm_unreachable("Unknown ICmp predicate!");
           // LHS <u RHS.
           case ICmpInst::ICMP_EQ:
           case ICmpInst::ICMP_UGT:
@@ -1826,8 +1824,7 @@
         // bits there.  Use this to work out the result of the comparison.
         if (RExt != CI) {
           switch (Pred) {
-          default:
-            assert(false && "Unknown ICmp predicate!");
+          default: llvm_unreachable("Unknown ICmp predicate!");
           case ICmpInst::ICMP_EQ:
             return ConstantInt::getFalse(CI->getContext());
           case ICmpInst::ICMP_NE: