More dead code removal (using -Wunreachable-code)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148578 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 1 insertions, 8 deletions

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 1709ee6..2926508 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -1210,7 +1210,6 @@ static Value *GetHeapSROAValue(Value *V, unsigned FieldNo,
     PHIsToRewrite.push_back(std::make_pair(PN, FieldNo));
   } else {
     llvm_unreachable("Unknown usable value");
-    Result = 0;
   }
 
   return FieldVals[FieldNo] = Result;
diff --git a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index 5f3b261..9a52be1 100644
--- a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -87,7 +87,6 @@ static unsigned getFCmpCode(FCmpInst::Predicate CC, bool &isOrdered) {
   default:
     // Not expecting FCMP_FALSE and FCMP_TRUE;
     llvm_unreachable("Unexpected FCmp predicate!");
-    return 0;
   }
 }
 
@@ -1555,7 +1554,6 @@ Value *InstCombiner::FoldOrOfICmps(ICmpInst *LHS, ICmpInst *RHS) {
     case ICmpInst::ICMP_SLT:         // (X != 13 | X s< 15) -> true
       return ConstantInt::getTrue(LHS->getContext());
     }
-    break;
   case ICmpInst::ICMP_ULT:
     switch (RHSCC) {
     default: llvm_unreachable("Unknown integer condition code!");
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp
index 49a498f..f5a7629 100644
--- a/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -215,7 +215,6 @@ Value *InstCombiner::EvaluateInDifferentType(Value *V, Type *Ty,
   default: 
     // TODO: Can handle more cases here.
     llvm_unreachable("Unreachable!");
-    break;
   }
   
   Res->takeName(I);
diff --git a/lib/Transforms/InstCombine/InstCombineSelect.cpp b/lib/Transforms/InstCombine/InstCombineSelect.cpp
index f1ea8ea..e727b2c 100644
--- a/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -184,7 +184,6 @@ Instruction *InstCombiner::FoldSelectOpOp(SelectInst &SI, Instruction *TI,
       return BinaryOperator::Create(BO->getOpcode(), NewSI, MatchOp);
   }
   llvm_unreachable("Shouldn't get here");
-  return 0;
 }
 
 static bool isSelect01(Constant *C1, Constant *C2) {
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 5aee483..6768860 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1318,7 +1318,7 @@ static bool isLegalUse(const TargetLowering::AddrMode &AM,
     return AM.Scale == 0 || AM.Scale == -1;
   }
 
-  return false;
+  llvm_unreachable("Invalid LSRUse Kind!");
 }
 
 static bool isLegalUse(TargetLowering::AddrMode AM,
diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index 08bb67e..9284401 100644
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -1997,7 +1997,6 @@ Depends(DependenceKind Flavor, Instruction *Inst, const Value *Arg,
       // Nothing else matters for objc_retainAutorelease formation.
       return false;
     }
-    break;
 
   case RetainAutoreleaseRVDep: {
     InstructionClass Class = GetBasicInstructionClass(Inst);
@@ -2011,7 +2010,6 @@ Depends(DependenceKind Flavor, Instruction *Inst, const Value *Arg,
       // retainAutoreleaseReturnValue formation.
       return CanInterruptRV(Class);
     }
-    break;
   }
 
   case RetainRVDep: