Merge System into Support.

[oota-llvm.git] / include / llvm / Target / TargetJITInfo.h

diff --git a/include/llvm/Target/TargetJITInfo.h b/include/llvm/Target/TargetJITInfo.h
index 3f48da9f40698270dc2ed163cf2c9fac5adc6888..b198eb62f0c6f135920e79074ac86002044321d2 100644 (file)
--- a/include/llvm/Target/TargetJITInfo.h
+++ b/include/llvm/Target/TargetJITInfo.h
@@ -18,12 +18,13 @@
 #define LLVM_TARGET_TARGETJITINFO_H
 
 #include <cassert>
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/DataTypes.h"
 
 namespace llvm {
   class Function;
   class GlobalValue;
-  class MachineCodeEmitter;
+  class JITCodeEmitter;
   class MachineRelocation;
 
   /// TargetJITInfo - Target specific information required by the Just-In-Time
@@ -39,31 +40,37 @@ namespace llvm {
     ///
     virtual void replaceMachineCodeForFunction(void *Old, void *New) = 0;
 
-    /// emitGlobalValueIndirectSym - Use the specified MachineCodeEmitter object
+    /// emitGlobalValueIndirectSym - Use the specified JITCodeEmitter object
     /// to emit an indirect symbol which contains the address of the specified
     /// ptr.
     virtual void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
-                                             MachineCodeEmitter &MCE) {
+                                             JITCodeEmitter &JCE) {
       assert(0 && "This target doesn't implement emitGlobalValueIndirectSym!");
       return 0;
     }
 
-    /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
+    /// Records the required size and alignment for a call stub in bytes.
+    struct StubLayout {
+      size_t Size;
+      size_t Alignment;
+    };
+    /// Returns the maximum size and alignment for a call stub on this target.
+    virtual StubLayout getStubLayout() {
+      llvm_unreachable("This target doesn't implement getStubLayout!");
+      StubLayout Result = {0, 0};
+      return Result;
+    }
+
+    /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a
     /// small native function that simply calls the function at the specified
-    /// address.  Return the address of the resultant function.
-    virtual void *emitFunctionStub(const Function* F, void *Fn,
-                                   MachineCodeEmitter &MCE) {
+    /// address.  The JITCodeEmitter must already have storage allocated for the
+    /// stub.  Return the address of the resultant function, which may have been
+    /// aligned from the address the JCE was set up to emit at.
+    virtual void *emitFunctionStub(const Function* F, void *Target,
+                                   JITCodeEmitter &JCE) {
       assert(0 && "This target doesn't implement emitFunctionStub!");
       return 0;
     }
-    
-    /// emitFunctionStubAtAddr - Use the specified MachineCodeEmitter object to
-    /// emit a small native function that simply calls Fn. Emit the stub into
-    /// the supplied buffer.
-    virtual void emitFunctionStubAtAddr(const Function* F, void *Fn,
-                                        void *Buffer, MachineCodeEmitter &MCE) {
-      assert(0 && "This target doesn't implement emitFunctionStubAtAddr!");
-    }
 
     /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
     /// specific basic block.
@@ -125,7 +132,7 @@ namespace llvm {
 
     /// allocateSeparateGVMemory - If true, globals should be placed in
     /// separately allocated heap memory rather than in the same
-    /// code memory allocated by MachineCodeEmitter.
+    /// code memory allocated by JITCodeEmitter.
     virtual bool allocateSeparateGVMemory() const { return false; }
   protected:
     bool useGOT;