It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.cpp b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
new file mode 100644
index 0000000..3a156bf
--- /dev/null
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
@@ -0,0 +1,106 @@
+//===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the top-level functionality for the LLVM interpreter.
+// This interpreter is designed to be a very simple, portable, inefficient
+// interpreter.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Interpreter.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/ModuleProvider.h"
+using namespace llvm;
+
+static struct RegisterInterp {
+ RegisterInterp() { Interpreter::Register(); }
+} InterpRegistrator;
+
+namespace llvm {
+ void LinkInInterpreter() {
+ }
+}
+
+/// create - Create a new interpreter object. This can never fail.
+///
+ExecutionEngine *Interpreter::create(ModuleProvider *MP, std::string* ErrStr) {
+ // Tell this ModuleProvide to materialize and release the module
+ Module *M = MP->releaseModule(ErrStr);
+ if (!M)
+ // We got an error, just return 0
+ return 0;
+
+ // This is a bit nasty, but the ExecutionEngine won't be able to delete the
+ // module due to use/def issues if we don't delete this MP here. Below we
+ // construct a new Interpreter with the Module we just got. This creates a
+ // new ExistingModuleProvider in the EE instance. Consequently, MP is left
+ // dangling and it contains references into the module which cause problems
+ // when the module is deleted via the ExistingModuleProvide via EE.
+ delete MP;
+
+ return new Interpreter(M);
+}
+
+//===----------------------------------------------------------------------===//
+// Interpreter ctor - Initialize stuff
+//
+Interpreter::Interpreter(Module *M) : ExecutionEngine(M), TD(M) {
+
+ memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
+ setTargetData(&TD);
+ // Initialize the "backend"
+ initializeExecutionEngine();
+ initializeExternalFunctions();
+ emitGlobals();
+
+ IL = new IntrinsicLowering(TD);
+}
+
+Interpreter::~Interpreter() {
+ delete IL;
+}
+
+void Interpreter::runAtExitHandlers () {
+ while (!AtExitHandlers.empty()) {
+ callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
+ AtExitHandlers.pop_back();
+ run();
+ }
+}
+
+/// run - Start execution with the specified function and arguments.
+///
+GenericValue
+Interpreter::runFunction(Function *F,
+ const std::vector<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
+ // expecting them. C programmers frequently bend the rules and
+ // declare main() with fewer parameters than it actually gets
+ // passed, and the interpreter barfs if you pass a function more
+ // 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]);
+
+ // Set up the function call.
+ callFunction(F, ActualArgs);
+
+ // Start executing the function.
+ run();
+
+ return ExitValue;
+}
+