Add back machine code deleter pass until we get a MachineCode pass

that will be responsible for the creation of MachineFunctions and will
be required by all MachineFunctionPass passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11453 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineFunction.cpp

@@ -62,6 +62,27 @@ FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS,
   return new Printer(OS, Banner);
 }
 
+namespace {
+  struct Deleter : public MachineFunctionPass {
+    const char *getPassName() const { return "Machine Code Deleter"; }
+
+    bool runOnMachineFunction(MachineFunction &MF) {
+      // Delete the annotation from the function now.
+      MachineFunction::destruct(MF.getFunction());
+      return true;
+    }
+  };
+}
+
+/// MachineCodeDeletion Pass - This pass deletes all of the machine code for
+/// the current function, which should happen after the function has been
+/// emitted to a .s file or to memory.
+FunctionPass *llvm::createMachineCodeDeleter() {
+  return new Deleter();
+}
+
+
+
 //===---------------------------------------------------------------------===//
 // MachineFunction implementation
 //===---------------------------------------------------------------------===//

lib/Target/PowerPC/PowerPCTargetMachine.cpp

@@ -45,6 +45,7 @@ bool PowerPCTargetMachine::addPassesToEmitAssembly(PassManager &PM,
   PM.add(createRegisterAllocator());
   PM.add(createPrologEpilogCodeInserter());
   // <insert assembly code output passes here>
+  PM.add(createMachineCodeDeleter());
   return true; // change to `return false' when this actually works.
 }
 

lib/Target/X86/X86CodeEmitter.cpp

@@ -212,6 +212,8 @@ namespace {
 bool X86TargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM,
                                                   MachineCodeEmitter &MCE) {
   PM.add(new Emitter(MCE));
+  // Delete machine code for this function
+  PM.add(createMachineCodeDeleter());
   return false;
 }
 

lib/Target/X86/X86TargetMachine.cpp

@@ -104,6 +104,9 @@ bool X86TargetMachine::addPassesToEmitAssembly(PassManager &PM,
   if (!DisableOutput)
     PM.add(createX86CodePrinterPass(Out, *this));
 
+  // Delete machine code for this function
+  PM.add(createMachineCodeDeleter());
+
   return false; // success!
 }