add target hooks for emitting random gunk before and after the function body.

llvm-svn: 94732

llvm/include/llvm/CodeGen/AsmPrinter.h

@@ -233,6 +233,14 @@ namespace llvm {
       assert(0 && "EmitInstruction not implemented");
     }
     
+    /// EmitFunctionBodyStart - Targets can override this to emit stuff before
+    /// the first basic block in the function.
+    virtual void EmitFunctionBodyStart() {}
+
+    /// EmitFunctionBodyEnd - Targets can override this to emit stuff after
+    /// the last basic block in the function.
+    virtual void EmitFunctionBodyEnd() {}
+    
     /// EmitConstantPool - Print to the current output stream assembly
     /// representations of the constants in the constant pool MCP. This is
     /// used to print out constants which have been "spilled to memory" by

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -344,6 +344,9 @@ void AsmPrinter::EmitFunctionEntryLabel() {
 /// EmitFunctionBody - This method emits the body and trailer for a
 /// function.
 void AsmPrinter::EmitFunctionBody() {
+  // Emit target-specific gunk before the function body.
+  EmitFunctionBodyStart();
+  
   // Print out code for the function.
   bool HasAnyRealCode = false;
   for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
@@ -378,6 +381,9 @@ void AsmPrinter::EmitFunctionBody() {
   if (MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode)
     OutStreamer.EmitIntValue(0, 1, 0/*addrspace*/);
   
+  // Emit target-specific gunk after the function body.
+  EmitFunctionBodyEnd();
+  
   if (MAI->hasDotTypeDotSizeDirective())
     O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';