[Kaleidoscope] Clang-format the Kaleidoscope tutorials.

Also reduces changes between tutorial chapters.

llvm-svn: 245472

1 files changed, 60 insertions, 47 deletions

diff --git a/llvm/examples/Kaleidoscope/Chapter5/toy.cpp b/llvm/examples/Kaleidoscope/Chapter5/toy.cpp
index 042d974626d..c191d61d562 100644
--- a/llvm/examples/Kaleidoscope/Chapter5/toy.cpp
+++ b/llvm/examples/Kaleidoscope/Chapter5/toy.cpp
@@ -123,6 +123,7 @@ public:
 /// NumberExprAST - Expression class for numeric literals like "1.0".
 class NumberExprAST : public ExprAST {
   double Val;
+
 public:
   NumberExprAST(double Val) : Val(Val) {}
   Value *Codegen() override;
@@ -131,6 +132,7 @@ public:
 /// VariableExprAST - Expression class for referencing a variable, like "a".
 class VariableExprAST : public ExprAST {
   std::string Name;
+
 public:
   VariableExprAST(const std::string &Name) : Name(Name) {}
   Value *Codegen() override;
@@ -140,6 +142,7 @@ public:
 class BinaryExprAST : public ExprAST {
   char Op;
   std::unique_ptr<ExprAST> LHS, RHS;
+
 public:
   BinaryExprAST(char Op, std::unique_ptr<ExprAST> LHS,
                 std::unique_ptr<ExprAST> RHS)
@@ -151,6 +154,7 @@ public:
 class CallExprAST : public ExprAST {
   std::string Callee;
   std::vector<std::unique_ptr<ExprAST>> Args;
+
 public:
   CallExprAST(const std::string &Callee,
               std::vector<std::unique_ptr<ExprAST>> Args)
@@ -161,6 +165,7 @@ public:
 /// IfExprAST - Expression class for if/then/else.
 class IfExprAST : public ExprAST {
   std::unique_ptr<ExprAST> Cond, Then, Else;
+
 public:
   IfExprAST(std::unique_ptr<ExprAST> Cond, std::unique_ptr<ExprAST> Then,
             std::unique_ptr<ExprAST> Else)
@@ -172,6 +177,7 @@ public:
 class ForExprAST : public ExprAST {
   std::string VarName;
   std::unique_ptr<ExprAST> Start, End, Step, Body;
+
 public:
   ForExprAST(const std::string &VarName, std::unique_ptr<ExprAST> Start,
              std::unique_ptr<ExprAST> End, std::unique_ptr<ExprAST> Step,
@@ -187,9 +193,10 @@ public:
 class PrototypeAST {
   std::string Name;
   std::vector<std::string> Args;
+
 public:
-  PrototypeAST(const std::string &name, std::vector<std::string> Args)
-      : Name(name), Args(std::move(Args)) {}
+  PrototypeAST(const std::string &Name, std::vector<std::string> Args)
+      : Name(Name), Args(std::move(Args)) {}
   Function *Codegen();
 };
 
@@ -197,10 +204,11 @@ public:
 class FunctionAST {
   std::unique_ptr<PrototypeAST> Proto;
   std::unique_ptr<ExprAST> Body;
+
 public:
   FunctionAST(std::unique_ptr<PrototypeAST> Proto,
               std::unique_ptr<ExprAST> Body)
-    : Proto(std::move(Proto)), Body(std::move(Body)) {}
+      : Proto(std::move(Proto)), Body(std::move(Body)) {}
   Function *Codegen();
 };
 } // end anonymous namespace
@@ -247,6 +255,26 @@ std::unique_ptr<FunctionAST> ErrorF(const char *Str) {
 
 static std::unique_ptr<ExprAST> ParseExpression();
 
+/// numberexpr ::= number
+static std::unique_ptr<ExprAST> ParseNumberExpr() {
+  auto Result = llvm::make_unique<NumberExprAST>(NumVal);
+  getNextToken(); // consume the number
+  return std::move(Result);
+}
+
+/// parenexpr ::= '(' expression ')'
+static std::unique_ptr<ExprAST> ParseParenExpr() {
+  getNextToken(); // eat (.
+  auto V = ParseExpression();
+  if (!V)
+    return nullptr;
+
+  if (CurTok != ')')
+    return Error("expected ')'");
+  getNextToken(); // eat ).
+  return V;
+}
+
 /// identifierexpr
 ///   ::= identifier
 ///   ::= identifier '(' expression* ')'
@@ -283,26 +311,6 @@ static std::unique_ptr<ExprAST> ParseIdentifierExpr() {
   return llvm::make_unique<CallExprAST>(IdName, std::move(Args));
 }
 
-/// numberexpr ::= number
-static std::unique_ptr<ExprAST> ParseNumberExpr() {
-  auto Result = llvm::make_unique<NumberExprAST>(NumVal);
-  getNextToken(); // consume the number
-  return std::move(Result);
-}
-
-/// parenexpr ::= '(' expression ')'
-static std::unique_ptr<ExprAST> ParseParenExpr() {
-  getNextToken(); // eat (.
-  auto V = ParseExpression();
-  if (!V)
-    return nullptr;
-
-  if (CurTok != ')')
-    return Error("expected ')'");
-  getNextToken(); // eat ).
-  return V;
-}
-
 /// ifexpr ::= 'if' expression 'then' expression 'else' expression
 static std::unique_ptr<ExprAST> ParseIfExpr() {
   getNextToken(); // eat the if.
@@ -434,8 +442,8 @@ static std::unique_ptr<ExprAST> ParseBinOpRHS(int ExprPrec,
     }
 
     // Merge LHS/RHS.
-    LHS = llvm::make_unique<BinaryExprAST>(BinOp, std::move(LHS),
-                                           std::move(RHS));
+    LHS =
+        llvm::make_unique<BinaryExprAST>(BinOp, std::move(LHS), std::move(RHS));
   }
 }
 
@@ -490,8 +498,8 @@ static std::unique_ptr<FunctionAST> ParseDefinition() {
 static std::unique_ptr<FunctionAST> ParseTopLevelExpr() {
   if (auto E = ParseExpression()) {
     // Make an anonymous proto.
-    auto Proto = llvm::make_unique<PrototypeAST>("",
-                                                 std::vector<std::string>());
+    auto Proto =
+        llvm::make_unique<PrototypeAST>("", std::vector<std::string>());
     return llvm::make_unique<FunctionAST>(std::move(Proto), std::move(E));
   }
   return nullptr;
@@ -624,23 +632,22 @@ Value *IfExprAST::Codegen() {
   return PN;
 }
 
+// Output for-loop as:
+//   ...
+//   start = startexpr
+//   goto loop
+// loop:
+//   variable = phi [start, loopheader], [nextvariable, loopend]
+//   ...
+//   bodyexpr
+//   ...
+// loopend:
+//   step = stepexpr
+//   nextvariable = variable + step
+//   endcond = endexpr
+//   br endcond, loop, endloop
+// outloop:
 Value *ForExprAST::Codegen() {
-  // Output this as:
-  //   ...
-  //   start = startexpr
-  //   goto loop
-  // loop:
-  //   variable = phi [start, loopheader], [nextvariable, loopend]
-  //   ...
-  //   bodyexpr
-  //   ...
-  // loopend:
-  //   step = stepexpr
-  //   nextvariable = variable + step
-  //   endcond = endexpr
-  //   br endcond, loop, endloop
-  // outloop:
-
   // Emit the start code first, without 'variable' in scope.
   Value *StartVal = Start->Codegen();
   if (!StartVal)
@@ -676,7 +683,7 @@ Value *ForExprAST::Codegen() {
     return nullptr;
 
   // Emit the step value.
-  Value *StepVal;
+  Value *StepVal = nullptr;
   if (Step) {
     StepVal = Step->Codegen();
     if (!StepVal)
@@ -691,7 +698,7 @@ Value *ForExprAST::Codegen() {
   // Compute the end condition.
   Value *EndCond = End->Codegen();
   if (!EndCond)
-    return EndCond;
+    return nullptr;
 
   // Convert condition to a bool by comparing equal to 0.0.
   EndCond = Builder.CreateFCmpONE(
@@ -849,9 +856,9 @@ static void MainLoop() {
     switch (CurTok) {
     case tok_eof:
       return;
-    case ';':
+    case ';': // ignore top-level semicolons.
       getNextToken();
-      break; // ignore top-level semicolons.
+      break;
     case tok_def:
       HandleDefinition();
       break;
@@ -875,6 +882,12 @@ extern "C" double putchard(double X) {
   return 0;
 }
 
+/// printd - printf that takes a double prints it as "%f\n", returning 0.
+extern "C" double printd(double X) {
+  printf("%f\n", X);
+  return 0;
+}
+
 //===----------------------------------------------------------------------===//
 // Main driver code.
 //===----------------------------------------------------------------------===//