[ExecutionEngine] ArrayRefize argument passing.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239687 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 28 insertions, 44 deletions

diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index 39a8027005f..dbfa37e2b0d 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -2073,8 +2073,7 @@ GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
 //===----------------------------------------------------------------------===//
 // callFunction - Execute the specified function...
 //
-void Interpreter::callFunction(Function *F,
-                               const std::vector<GenericValue> &ArgVals) {
+void Interpreter::callFunction(Function *F, ArrayRef<GenericValue> ArgVals) {
   assert((ECStack.empty() || !ECStack.back().Caller.getInstruction() ||
           ECStack.back().Caller.arg_size() == ArgVals.size()) &&
          "Incorrect number of arguments passed into function call!");
diff --git a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
index e2fe0651c7e..9b44042d614 100644
--- a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
+++ b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
@@ -49,8 +49,7 @@ using namespace llvm;
 
 static ManagedStatic<sys::Mutex> FunctionsLock;
 
-typedef GenericValue (*ExFunc)(FunctionType *,
-                               const std::vector<GenericValue> &);
+typedef GenericValue (*ExFunc)(FunctionType *, ArrayRef<GenericValue>);
 static ManagedStatic<std::map<const Function *, ExFunc> > ExportedFunctions;
 static ManagedStatic<std::map<std::string, ExFunc> > FuncNames;
 
@@ -178,8 +177,7 @@ static void *ffiValueFor(Type *Ty, const GenericValue &AV,
   return NULL;
 }
 
-static bool ffiInvoke(RawFunc Fn, Function *F,
-                      const std::vector<GenericValue> &ArgVals,
+static bool ffiInvoke(RawFunc Fn, Function *F, ArrayRef<GenericValue> ArgVals,
                       const DataLayout *TD, GenericValue &Result) {
   ffi_cif cif;
   FunctionType *FTy = F->getFunctionType();
@@ -245,7 +243,7 @@ static bool ffiInvoke(RawFunc Fn, Function *F,
 #endif // USE_LIBFFI
 
 GenericValue Interpreter::callExternalFunction(Function *F,
-                                     const std::vector<GenericValue> &ArgVals) {
+                                               ArrayRef<GenericValue> ArgVals) {
   TheInterpreter = this;
 
   unique_lock<sys::Mutex> Guard(*FunctionsLock);
@@ -298,9 +296,8 @@ GenericValue Interpreter::callExternalFunction(Function *F,
 //
 
 // void atexit(Function*)
-static
-GenericValue lle_X_atexit(FunctionType *FT,
-                          const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_atexit(FunctionType *FT,
+                                 ArrayRef<GenericValue> Args) {
   assert(Args.size() == 1);
   TheInterpreter->addAtExitHandler((Function*)GVTOP(Args[0]));
   GenericValue GV;
@@ -309,17 +306,13 @@ GenericValue lle_X_atexit(FunctionType *FT,
 }
 
 // void exit(int)
-static
-GenericValue lle_X_exit(FunctionType *FT,
-                        const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_exit(FunctionType *FT, ArrayRef<GenericValue> Args) {
   TheInterpreter->exitCalled(Args[0]);
   return GenericValue();
 }
 
 // void abort(void)
-static
-GenericValue lle_X_abort(FunctionType *FT,
-                         const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_abort(FunctionType *FT, ArrayRef<GenericValue> Args) {
   //FIXME: should we report or raise here?
   //report_fatal_error("Interpreted program raised SIGABRT");
   raise (SIGABRT);
@@ -328,9 +321,8 @@ GenericValue lle_X_abort(FunctionType *FT,
 
 // int sprintf(char *, const char *, ...) - a very rough implementation to make
 // output useful.
-static
-GenericValue lle_X_sprintf(FunctionType *FT,
-                           const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_sprintf(FunctionType *FT,
+                                  ArrayRef<GenericValue> Args) {
   char *OutputBuffer = (char *)GVTOP(Args[0]);
   const char *FmtStr = (const char *)GVTOP(Args[1]);
   unsigned ArgNo = 2;
@@ -411,9 +403,8 @@ GenericValue lle_X_sprintf(FunctionType *FT,
 
 // int printf(const char *, ...) - a very rough implementation to make output
 // useful.
-static
-GenericValue lle_X_printf(FunctionType *FT,
-                          const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_printf(FunctionType *FT,
+                                 ArrayRef<GenericValue> Args) {
   char Buffer[10000];
   std::vector<GenericValue> NewArgs;
   NewArgs.push_back(PTOGV((void*)&Buffer[0]));
@@ -424,9 +415,8 @@ GenericValue lle_X_printf(FunctionType *FT,
 }
 
 // int sscanf(const char *format, ...);
-static
-GenericValue lle_X_sscanf(FunctionType *FT,
-                          const std::vector<GenericValue> &args) {
+static GenericValue lle_X_sscanf(FunctionType *FT,
+                                 ArrayRef<GenericValue> args) {
   assert(args.size() < 10 && "Only handle up to 10 args to sscanf right now!");
 
   char *Args[10];
@@ -440,9 +430,7 @@ GenericValue lle_X_sscanf(FunctionType *FT,
 }
 
 // int scanf(const char *format, ...);
-static
-GenericValue lle_X_scanf(FunctionType *FT,
-                         const std::vector<GenericValue> &args) {
+static GenericValue lle_X_scanf(FunctionType *FT, ArrayRef<GenericValue> args) {
   assert(args.size() < 10 && "Only handle up to 10 args to scanf right now!");
 
   char *Args[10];
@@ -457,9 +445,8 @@ GenericValue lle_X_scanf(FunctionType *FT,
 
 // int fprintf(FILE *, const char *, ...) - a very rough implementation to make
 // output useful.
-static
-GenericValue lle_X_fprintf(FunctionType *FT,
-                           const std::vector<GenericValue> &Args) {
+static GenericValue lle_X_fprintf(FunctionType *FT,
+                                  ArrayRef<GenericValue> Args) {
   assert(Args.size() >= 2);
   char Buffer[10000];
   std::vector<GenericValue> NewArgs;
@@ -472,7 +459,7 @@ GenericValue lle_X_fprintf(FunctionType *FT,
 }
 
 static GenericValue lle_X_memset(FunctionType *FT,
-                                 const std::vector<GenericValue> &Args) {
+                                 ArrayRef<GenericValue> Args) {
   int val = (int)Args[1].IntVal.getSExtValue();
   size_t len = (size_t)Args[2].IntVal.getZExtValue();
   memset((void *)GVTOP(Args[0]), val, len);
@@ -484,7 +471,7 @@ static GenericValue lle_X_memset(FunctionType *FT,
 }
 
 static GenericValue lle_X_memcpy(FunctionType *FT,
-                                 const std::vector<GenericValue> &Args) {
+                                 ArrayRef<GenericValue> Args) {
   memcpy(GVTOP(Args[0]), GVTOP(Args[1]),
          (size_t)(Args[2].IntVal.getLimitedValue()));
 
diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.cpp b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
index 8562981b629..f103c09659a 100644
--- a/lib/ExecutionEngine/Interpreter/Interpreter.cpp
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
@@ -67,7 +67,7 @@ Interpreter::~Interpreter() {
 
 void Interpreter::runAtExitHandlers () {
   while (!AtExitHandlers.empty()) {
-    callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
+    callFunction(AtExitHandlers.back(), None);
     AtExitHandlers.pop_back();
     run();
   }
@@ -75,9 +75,8 @@ void Interpreter::runAtExitHandlers () {
 
 /// run - Start execution with the specified function and arguments.
 ///
-GenericValue
-Interpreter::runFunction(Function *F,
-                         const std::vector<GenericValue> &ArgValues) {
+GenericValue Interpreter::runFunction(Function *F,
+                                      ArrayRef<GenericValue> ArgValues) {
   assert (F && "Function *F was null at entry to run()");
 
   // Try extra hard not to pass extra args to a function that isn't
@@ -87,10 +86,9 @@ Interpreter::runFunction(Function *F,
   // parameters than it is declared to take. This does not attempt to
   // take into account gratuitous differences in declared types,
   // though.
-  std::vector<GenericValue> ActualArgs;
-  const unsigned ArgCount = F->getFunctionType()->getNumParams();
-  for (unsigned i = 0; i < ArgCount; ++i)
-    ActualArgs.push_back(ArgValues[i]);
+  const size_t ArgCount = F->getFunctionType()->getNumParams();
+  ArrayRef<GenericValue> ActualArgs =
+      ArgValues.slice(0, std::min(ArgValues.size(), ArgCount));
 
   // Set up the function call.
   callFunction(F, ActualArgs);
diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.h b/lib/ExecutionEngine/Interpreter/Interpreter.h
index 0dc0463903d..f97664181a8 100644
--- a/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -127,7 +127,7 @@ public:
   /// run - Start execution with the specified function and arguments.
   ///
   GenericValue runFunction(Function *F,
-                           const std::vector<GenericValue> &ArgValues) override;
+                           ArrayRef<GenericValue> ArgValues) override;
 
   void *getPointerToNamedFunction(StringRef Name,
                                   bool AbortOnFailure = true) override {
@@ -137,7 +137,7 @@ public:
 
   // Methods used to execute code:
   // Place a call on the stack
-  void callFunction(Function *F, const std::vector<GenericValue> &ArgVals);
+  void callFunction(Function *F, ArrayRef<GenericValue> ArgVals);
   void run();                // Execute instructions until nothing left to do
 
   // Opcode Implementations
@@ -194,7 +194,7 @@ public:
   }
 
   GenericValue callExternalFunction(Function *F,
-                                    const std::vector<GenericValue> &ArgVals);
+                                    ArrayRef<GenericValue> ArgVals);
   void exitCalled(GenericValue GV);
 
   void addAtExitHandler(Function *F) {