add support for metadata.

add related test.

llvm/_core.cpp

@@ -618,6 +618,11 @@ _wrap_objstr2obj(LLVMAppendBasicBlock, LLVMValueRef, LLVMBasicBlockRef)
 _wrap_objstr2obj(LLVMInsertBasicBlock, LLVMBasicBlockRef, LLVMBasicBlockRef)
 _wrap_obj2none(LLVMDeleteBasicBlock, LLVMBasicBlockRef)
 
+
+/*===-- MetaData -----------------------------------------------------===*/
+
+_wrap_objlist2obj(LLVMMetaDataGet, LLVMModuleRef, LLVMValueRef, LLVMValueRef)
+
 /*===-- Instructions -----------------------------------------------------===*/
 
 _wrap_obj2obj(LLVMGetInstructionParent, LLVMValueRef, LLVMBasicBlockRef)
@@ -636,6 +641,8 @@ _wrap_objint2none(LLVMSetVolatile,    LLVMValueRef)
 _wrap_obj2obj(LLVMInstGetOpcode,      LLVMValueRef, int)
 _wrap_obj2str(LLVMInstGetOpcodeName,  LLVMValueRef)
 
+_wrap_objstrobj2none(LLVMInstSetMetaData, LLVMValueRef, LLVMValueRef)
+
 /*===-- Call Sites (Call or Invoke) --------------------------------------===*/
 
 _wrap_objint2none(LLVMSetInstructionCallConv, LLVMValueRef)
@@ -1691,6 +1698,9 @@ static PyMethodDef core_methods[] = {
     _method( LLVMInsertBasicBlock )
     _method( LLVMDeleteBasicBlock )
 
+    /* MetaData */
+    _method( LLVMMetaDataGet )
+
     /* Instructions */
     _method( LLVMGetInstructionParent )
     _method( LLVMGetFirstInstruction )
@@ -1708,6 +1718,8 @@ static PyMethodDef core_methods[] = {
     _method( LLVMInstGetOpcode )
     _method( LLVMInstGetOpcodeName )
 
+    _method( LLVMInstSetMetaData )
+
     /* Call Sites (Call or Invoke) */
     _method( LLVMSetInstructionCallConv )
     _method( LLVMGetInstructionCallConv )

llvm/core.py

@@ -1427,6 +1427,17 @@ class Function(GlobalValue):
         # failure, it appears to print result to stderr and abort.
         return _core.LLVMVerifyFunction(self.ptr) != 0
 
+#===----------------------------------------------------------------------===
+# MetaData
+#===----------------------------------------------------------------------===
+
+class MetaData(Value):
+    @staticmethod
+    def get(module, values):
+        vs = unpack_values(values)
+        ptr = _core.LLVMMetaDataGet(module.ptr, vs)
+        return MetaData(ptr)
+
 #===----------------------------------------------------------------------===
 # Instruction
 #===----------------------------------------------------------------------===
@@ -1477,6 +1488,9 @@ class Instruction(User):
     def set_volatile(self, flag):
         return _core.LLVMSetVolatile(self.ptr, int(bool(flag)))
 
+    def set_metadata(self, kind, metadata):
+        return _core.LLVMInstSetMetaData(self.ptr, kind, metadata.ptr)
+
     @property
     def opcode(self):
         return _core.LLVMInstGetOpcode(self.ptr)

llvm/extra.cpp

@@ -83,11 +83,11 @@
 #include "extra.h"
 #include "llvm_c_extra.h"
 
-
 namespace llvm{
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(EngineBuilder, LLVMEngineBuilderRef)
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(TargetMachine, LLVMTargetMachineRef)
 }
+
 /*
  * For use in LLVMDumpPasses to dump passes.
  */
@@ -127,7 +127,27 @@ const CodeGenOpt::Level OptLevelMap[] = {
 } // end anony namespace
 
 
+void LLVMInstSetMetaData(LLVMValueRef instref, const char* mdkind,
+                         LLVMValueRef metaref)
+{
+    using namespace llvm;
+    unwrap<Instruction>(instref)->setMetadata(mdkind, unwrap<MDNode>(metaref));
+}
 
+LLVMValueRef LLVMMetaDataGet(LLVMModuleRef modref, LLVMValueRef * valrefs,
+                             unsigned valct)
+{
+    using namespace llvm;
+    LLVMContext & context = unwrap(modref)->getContext();
+    std::vector<Value*> vals;
+    vals.reserve(valct);
+    for(unsigned i = 0; i < valct; ++i ){
+        vals.push_back(unwrap(valrefs[i]));
+    }
+
+    MDNode * const node = MDNode::get(context, vals);
+    return wrap(node);
+}
 
 const char *LLVMGetConstExprOpcodeName(LLVMValueRef inst)
 {

llvm/extra.h

@@ -53,15 +53,25 @@
 extern "C" {
 #endif
 
-
+/*
+ * Wraps Instruction::setMetadata()
+ */
+void LLVMInstSetMetaData(LLVMValueRef instref, const char* mdkind,
+                         LLVMValueRef metaref);
 
 /*
- * Wraps ConstantExpr::getOpcodeName();
+ * Wraps MDNode::get()
+ */
+LLVMValueRef LLVMMetaDataGet(LLVMModuleRef modref, LLVMValueRef * valrefs,
+                             unsigned valct);
+
+/*
+ * Wraps ConstantExpr::getOpcodeName()
  */
 const char *LLVMGetConstExprOpcodeName(LLVMValueRef inst);
 
 /*
- * Wraps ConstantExpr::getOpcode();
+ * Wraps ConstantExpr::getOpcode()
  */
 unsigned LLVMGetConstExprOpcode(LLVMValueRef inst);
 

llvm/wrap.h

@@ -635,6 +635,30 @@ _w ## func (PyObject *self, PyObject *args)                     \
     return ctor_ ## outtype ( func (arg1, arg2, arg3));         \
 }
 
+/**
+ * Wrap LLVM functions of the type
+ * void func(intype1 arg1, const char *arg2, intype3 arg3)
+ */
+#define _wrap_objstrobj2none(func, intype1, intype3)    \
+static PyObject *                                               \
+_w ## func (PyObject *self, PyObject *args)                     \
+{                                                               \
+    PyObject *obj1, *obj3;                                      \
+    intype1 arg1;                                               \
+    const char *arg2;                                           \
+    intype3 arg3;                                               \
+                                                                \
+    if (!PyArg_ParseTuple(args, "OsO", &obj1, &arg2, &obj3))    \
+        return NULL;                                            \
+                                                                \
+    arg1 = ( intype1 ) PyCapsule_GetPointer(obj1, NULL);        \
+    arg3 = ( intype3 ) PyCapsule_GetPointer(obj3, NULL);        \
+                                                                \
+    func(arg1, arg2, arg3);                                     \
+                                                                \
+    Py_RETURN_NONE;                                             \
+}
+
 
 /**
  * Wrap LLVM functions of the type

test/metadata.py

@@ -0,0 +1,28 @@
+import unittest
+
+from llvm.core import *
+
+class TestMetaData(unittest.TestCase):
+    def test_metadata_get(self):
+        module = Module.new('test_metadata')
+        md = MetaData.get(module, [Constant.int(Type.int(), 1234)])
+
+    def test_meta_load_nt(self):
+        module = Module.new('test_meta_load_nt')
+        func = module.add_function(Type.function(Type.void(), []),
+                                   name='test_load_nt')
+        bldr = Builder.new(func.append_basic_block('entry'))
+        addr = Constant.int(Type.int(), 0xdeadbeef)
+        loadinst = bldr.load(bldr.inttoptr(addr, Type.pointer(Type.int(8))))
+
+        md = MetaData.get(module, [Constant.int(Type.int(), 1)])
+        loadinst.set_metadata('nontemporal', md)
+
+        bldr.ret_void()
+        module.verify()
+
+        self.assertIn('!nontemporal', str(loadinst))
+
+if __name__ == '__main__':
+    unittest.main()
+