Add 'llvm_unreachable' to passify GCC's understanding of the constraints

of several newly un-defaulted switches. This also helps optimizers
(including LLVM's) recognize that every case is covered, and we should
assume as much.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147861 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 5 insertions, 0 deletions

diff --git a/lib/CodeGen/GCMetadata.cpp b/lib/CodeGen/GCMetadata.cpp
index 45a64d2e04..1caf8c2339 100644
--- a/lib/CodeGen/GCMetadata.cpp
+++ b/lib/CodeGen/GCMetadata.cpp
@@ -148,6 +148,7 @@ static const char *DescKind(GC::PointKind Kind) {
     case GC::PreCall:  return "pre-call";
     case GC::PostCall: return "post-call";
   }
+  llvm_unreachable("Invalid point kind");
 }
 
 bool Printer::runOnFunction(Function &F) {
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 28c63a794c..a11c55dea3 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -96,6 +96,7 @@ static bool getVerboseAsm() {
   case cl::BOU_TRUE:  return true;
   case cl::BOU_FALSE: return false;
   }
+  llvm_unreachable("Invalid verbose asm state");
 }
 
 // Enable or disable FastISel. Both options are needed, because
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index f7a0e102df..99081bdbae 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -221,6 +221,7 @@ bool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
   case MachineOperand::MO_Metadata:
     return getMetadata() == Other.getMetadata();
   }
+  llvm_unreachable("Invalid machine operand type");
 }
 
 /// print - Print the specified machine operand.
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 8ed1351748..bd930d8ef1 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -3016,6 +3016,7 @@ static unsigned getConstraintGenerality(TargetLowering::ConstraintType CT) {
   case TargetLowering::C_Memory:
     return 3;
   }
+  llvm_unreachable("Invalid constraint type");
 }
 
 /// Examine constraint type and operand type and determine a weight value.
diff --git a/lib/CodeGen/Spiller.cpp b/lib/CodeGen/Spiller.cpp
index ec44d87a20..260eceab8a 100644
--- a/lib/CodeGen/Spiller.cpp
+++ b/lib/CodeGen/Spiller.cpp
@@ -194,4 +194,5 @@ llvm::Spiller* llvm::createSpiller(MachineFunctionPass &pass,
   case trivial: return new TrivialSpiller(pass, mf, vrm);
   case inline_: return createInlineSpiller(pass, mf, vrm);
   }
+  llvm_unreachable("Invalid spiller optimization");
 }