aboutsummaryrefslogtreecommitdiff
path: root/lib/ExecutionEngine/JIT/VM.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/ExecutionEngine/JIT/VM.cpp')
-rw-r--r--lib/ExecutionEngine/JIT/VM.cpp114
1 files changed, 0 insertions, 114 deletions
diff --git a/lib/ExecutionEngine/JIT/VM.cpp b/lib/ExecutionEngine/JIT/VM.cpp
deleted file mode 100644
index 5dffa5c913..0000000000
--- a/lib/ExecutionEngine/JIT/VM.cpp
+++ /dev/null
@@ -1,114 +0,0 @@
-//===-- VM.cpp - LLVM Just in Time Compiler -------------------------------===//
-//
-// 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 tool implements a just-in-time compiler for LLVM, allowing direct
-// execution of LLVM bytecode in an efficient manner.
-//
-//===----------------------------------------------------------------------===//
-
-#include "VM.h"
-#include "llvm/Function.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetJITInfo.h"
-using namespace llvm;
-
-VM::~VM() {
- delete MCE;
- delete &TM;
-}
-
-/// setupPassManager - Initialize the VM PassManager object with all of the
-/// passes needed for the target to generate code.
-///
-void VM::setupPassManager() {
- // Compile LLVM Code down to machine code in the intermediate representation
- TJI.addPassesToJITCompile(PM);
-
- // Turn the machine code intermediate representation into bytes in memory that
- // may be executed.
- if (TM.addPassesToEmitMachineCode(PM, *MCE)) {
- std::cerr << "lli: target '" << TM.getName()
- << "' doesn't support machine code emission!\n";
- abort();
- }
-}
-
-/// runJITOnFunction - Run the FunctionPassManager full of
-/// just-in-time compilation passes on F, hopefully filling in
-/// GlobalAddress[F] with the address of F's machine code.
-///
-void VM::runJITOnFunction(Function *F) {
- static bool isAlreadyCodeGenerating = false;
- assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!");
-
- // JIT the function
- isAlreadyCodeGenerating = true;
- PM.run(*F);
- isAlreadyCodeGenerating = false;
-}
-
-/// getPointerToFunction - This method is used to get the address of the
-/// specified function, compiling it if neccesary.
-///
-void *VM::getPointerToFunction(Function *F) {
- void *&Addr = GlobalAddress[F]; // Check if function already code gen'd
- if (Addr) return Addr;
-
- // Make sure we read in the function if it exists in this Module
- MP->materializeFunction(F);
-
- if (F->isExternal())
- return Addr = getPointerToNamedFunction(F->getName());
-
- runJITOnFunction(F);
- assert(Addr && "Code generation didn't add function to GlobalAddress table!");
- return Addr;
-}
-
-// getPointerToFunctionOrStub - If the specified function has been
-// code-gen'd, return a pointer to the function. If not, compile it, or use
-// a stub to implement lazy compilation if available.
-//
-void *VM::getPointerToFunctionOrStub(Function *F) {
- // If we have already code generated the function, just return the address.
- std::map<const GlobalValue*, void *>::iterator I = GlobalAddress.find(F);
- if (I != GlobalAddress.end()) return I->second;
-
- // If the target supports "stubs" for functions, get a stub now.
- if (void *Ptr = TJI.getJITStubForFunction(F, *MCE))
- return Ptr;
-
- // Otherwise, if the target doesn't support it, just codegen the function.
- return getPointerToFunction(F);
-}
-
-/// recompileAndRelinkFunction - This method is used to force a function
-/// which has already been compiled, to be compiled again, possibly
-/// after it has been modified. Then the entry to the old copy is overwritten
-/// with a branch to the new copy. If there was no old copy, this acts
-/// just like VM::getPointerToFunction().
-///
-void *VM::recompileAndRelinkFunction(Function *F) {
- void *&Addr = GlobalAddress[F]; // Check if function already code gen'd
-
- // If it's not already compiled (this is kind of weird) there is no
- // reason to patch it up.
- if (!Addr) { return getPointerToFunction (F); }
-
- void *OldAddr = Addr;
- Addr = 0;
- MachineFunction::destruct(F);
- runJITOnFunction(F);
- assert(Addr && "Code generation didn't add function to GlobalAddress table!");
- TJI.replaceMachineCodeForFunction(OldAddr, Addr);
- return Addr;
-}