Get rid of the multiple copies of getStringValue. Now a Constant:: method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26616 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 46 insertions, 103 deletions

diff --git a/lib/CodeGen/DwarfWriter.cpp b/lib/CodeGen/DwarfWriter.cpp
index 99beaf3..ce82d97 100644
--- a/lib/CodeGen/DwarfWriter.cpp
+++ b/lib/CodeGen/DwarfWriter.cpp
@@ -1244,7 +1244,6 @@ DIE *DwarfWriter::NewBasicType(DIE *Context, Type *Ty) {
 /// NewType - Create a new type DIE.
 ///
 DIE *DwarfWriter::NewType(DIE *Context, TypeDesc *TyDesc) {
-  // FIXME - hack to get around NULL types short term.
   if (!TyDesc)  return NewBasicType(Context, Type::IntTy);
   
   // FIXME - Should handle other contexts that compile units.
diff --git a/lib/CodeGen/MachineDebugInfo.cpp b/lib/CodeGen/MachineDebugInfo.cpp
index 45ded8e..e18a243 100644
--- a/lib/CodeGen/MachineDebugInfo.cpp
+++ b/lib/CodeGen/MachineDebugInfo.cpp
@@ -67,45 +67,6 @@ getGlobalVariablesUsing(Module &M, const std::string &RootName) {
   return Result;
 }
   
-/// getStringValue - Turn an LLVM constant pointer that eventually points to a
-/// global into a string value.  Return an empty string if we can't do it.
-///
-static const std::string getStringValue(Value *V, unsigned Offset = 0) {
-  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
-    if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
-      ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
-      if (Init->isString()) {
-        std::string Result = Init->getAsString();
-        if (Offset < Result.size()) {
-          // If we are pointing INTO The string, erase the beginning...
-          Result.erase(Result.begin(), Result.begin()+Offset);
-
-          // Take off the null terminator, and any string fragments after it.
-          std::string::size_type NullPos = Result.find_first_of((char)0);
-          if (NullPos != std::string::npos)
-            Result.erase(Result.begin()+NullPos, Result.end());
-          return Result;
-        }
-      }
-    }
-  } else if (Constant *C = dyn_cast<Constant>(V)) {
-    if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
-      return getStringValue(GV, Offset);
-    else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
-      if (CE->getOpcode() == Instruction::GetElementPtr) {
-        // Turn a gep into the specified offset.
-        if (CE->getNumOperands() == 3 &&
-            cast<Constant>(CE->getOperand(1))->isNullValue() &&
-            isa<ConstantInt>(CE->getOperand(2))) {
-          return getStringValue(CE->getOperand(0),
-                   Offset+cast<ConstantInt>(CE->getOperand(2))->getRawValue());
-        }
-      }
-    }
-  }
-  return "";
-}
-
 /// isStringValue - Return true if the given value can be coerced to a string.
 ///
 static bool isStringValue(Value *V) {
@@ -250,7 +211,7 @@ public:
   }
   virtual void Apply(std::string &Field) {
     Constant *C = CI->getOperand(I++);
-    Field = getStringValue(C);
+    Field = C->getStringValue();
   }
   virtual void Apply(DebugInfoDesc *&Field) {
     Constant *C = CI->getOperand(I++);
@@ -571,7 +532,7 @@ void AnchorDesc::ApplyToFields(DIVisitor *Visitor) {
 
 /// getDescString - Return a string used to compose global names and labels. A
 /// A global variable name needs to be defined for each debug descriptor that is
-/// anchored. NOTE: that each global variable name here also needs to be added
+/// anchored. NOTE: that each global variable named here also needs to be added
 /// to the list of names left external in the internalizer.
 ///   ExternalNames.insert("llvm.dbg.compile_units");
 ///   ExternalNames.insert("llvm.dbg.global_variables");
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index b0eae94..58cf185 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -873,24 +873,6 @@ void SelectionDAGLowering::visitAlloca(AllocaInst &I) {
   CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject();
 }
 
-/// getStringValue - Turn an LLVM constant pointer that eventually points to a
-/// global into a string value.  Return an empty string if we can't do it.
-///
-static std::string getStringValue(GlobalVariable *GV, unsigned Offset = 0) {
-  if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
-    ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
-    if (Init->isString()) {
-      std::string Result = Init->getAsString();
-      if (Offset < Result.size()) {
-        // If we are pointing INTO The string, erase the beginning...
-        Result.erase(Result.begin(), Result.begin()+Offset);
-        return Result;
-      }
-    }
-  }
-  return "";
-}
-
 void SelectionDAGLowering::visitLoad(LoadInst &I) {
   SDOperand Ptr = getValue(I.getOperand(0));
 
@@ -1962,7 +1944,7 @@ void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
         if (G) {
           GlobalVariable *GV = dyn_cast<GlobalVariable>(G->getGlobal());
           if (GV) {
-            Str = getStringValue(GV);
+            Str = GV->getStringValue();
             if (!Str.empty()) {
               CopyFromStr = true;
               SrcOff += SrcDelta;
diff --git a/lib/Debugger/ProgramInfo.cpp b/lib/Debugger/ProgramInfo.cpp
index b55606b..ebca794 100644
--- a/lib/Debugger/ProgramInfo.cpp
+++ b/lib/Debugger/ProgramInfo.cpp
@@ -38,45 +38,6 @@ static void getGlobalVariablesUsing(Value *V,
   }
 }
 
-/// getStringValue - Turn an LLVM constant pointer that eventually points to a
-/// global into a string value.  Return an empty string if we can't do it.
-///
-static std::string getStringValue(Value *V, unsigned Offset = 0) {
-  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
-    if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
-      ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
-      if (Init->isString()) {
-        std::string Result = Init->getAsString();
-        if (Offset < Result.size()) {
-          // If we are pointing INTO The string, erase the beginning...
-          Result.erase(Result.begin(), Result.begin()+Offset);
-
-          // Take off the null terminator, and any string fragments after it.
-          std::string::size_type NullPos = Result.find_first_of((char)0);
-          if (NullPos != std::string::npos)
-            Result.erase(Result.begin()+NullPos, Result.end());
-          return Result;
-        }
-      }
-    }
-  } else if (Constant *C = dyn_cast<Constant>(V)) {
-    if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
-      return getStringValue(GV, Offset);
-    else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
-      if (CE->getOpcode() == Instruction::GetElementPtr) {
-        // Turn a gep into the specified offset.
-        if (CE->getNumOperands() == 3 &&
-            cast<Constant>(CE->getOperand(1))->isNullValue() &&
-            isa<ConstantInt>(CE->getOperand(2))) {
-          return getStringValue(CE->getOperand(0),
-                   Offset+cast<ConstantInt>(CE->getOperand(2))->getRawValue());
-        }
-      }
-    }
-  }
-  return "";
-}
-
 /// getNextStopPoint - Follow the def-use chains of the specified LLVM value,
 /// traversing the use chains until we get to a stoppoint.  When we do, return
 /// the source location of the stoppoint.  If we don't find a stoppoint, return
@@ -158,8 +119,8 @@ SourceFileInfo::SourceFileInfo(const GlobalVariable *Desc,
         if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(CS->getOperand(1)))
           Version = CUI->getValue();
 
-        BaseName  = getStringValue(CS->getOperand(3));
-        Directory = getStringValue(CS->getOperand(4));
+        BaseName  = CS->getOperand(3)->getStringValue();
+        Directory = CS->getOperand(4)->getStringValue();
       }
 }
 
@@ -199,7 +160,7 @@ SourceFunctionInfo::SourceFunctionInfo(ProgramInfo &PI,
           SourceFile = &PI.getSourceFile(GV);
 
         // Entry #2 is the function name.
-        Name = getStringValue(CS->getOperand(2));
+        Name = CS->getOperand(2)->getStringValue();
       }
 }
 
diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index c8a5f35..1beb5bc 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -1712,3 +1712,43 @@ void Constant::clearAllValueMaps() {
     (*I)->destroyConstantImpl();
   Constants.clear();
 }
+
+/// getStringValue - Turn an LLVM constant pointer that eventually points to a
+/// global into a string value.  Return an empty string if we can't do it.
+///
+std::string Constant::getStringValue(unsigned Offset) {
+  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(this)) {
+    if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
+      ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
+      if (Init->isString()) {
+        std::string Result = Init->getAsString();
+        if (Offset < Result.size()) {
+          // If we are pointing INTO The string, erase the beginning...
+          Result.erase(Result.begin(), Result.begin()+Offset);
+
+          // Take off the null terminator, and any string fragments after it.
+          std::string::size_type NullPos = Result.find_first_of((char)0);
+          if (NullPos != std::string::npos)
+            Result.erase(Result.begin()+NullPos, Result.end());
+          return Result;
+        }
+      }
+    }
+  } else if (Constant *C = dyn_cast<Constant>(this)) {
+    if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
+      return GV->getStringValue(Offset);
+    else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
+      if (CE->getOpcode() == Instruction::GetElementPtr) {
+        // Turn a gep into the specified offset.
+        if (CE->getNumOperands() == 3 &&
+            cast<Constant>(CE->getOperand(1))->isNullValue() &&
+            isa<ConstantInt>(CE->getOperand(2))) {
+          Offset += cast<ConstantInt>(CE->getOperand(2))->getRawValue();
+          return CE->getOperand(0)->getStringValue(Offset);
+        }
+      }
+    }
+  }
+  return "";
+}
+