Code pulled out of MAchineInstr.(h|cpp)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1660 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 57 insertions, 0 deletions

diff --git a/lib/CodeGen/MachineCodeForInstruction.cpp b/lib/CodeGen/MachineCodeForInstruction.cpp
new file mode 100644
index 0000000000..97a53752e1
--- /dev/null
+++ b/lib/CodeGen/MachineCodeForInstruction.cpp
@@ -0,0 +1,57 @@
+//===-- MachineCodeForInstruction.cpp -------------------------------------===//
+//
+//   Representation of the sequence of machine instructions created
+//   for a single VM instruction.  Additionally records information
+//   about hidden and implicit values used by the machine instructions:
+//   about hidden values used by the machine instructions:
+// 
+//   "Temporary values" are intermediate values used in the machine
+//   instruction sequence, but not in the VM instruction
+//   Note that such values should be treated as pure SSA values with
+//   no interpretation of their operands (i.e., as a TmpInstruction
+//   object which actually represents such a value).
+// 
+//   (2) "Implicit uses" are values used in the VM instruction but not in
+//       the machine instruction sequence
+// 
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MachineCodeForInstruction.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Instruction.h"
+
+static AnnotationID MCFI_AID(
+             AnnotationManager::getID("CodeGen::MachineCodeForInstruction"));
+
+static Annotation *CreateMCFI(AnnotationID AID, const Annotable *, void *) {
+  assert(AID == MCFI_AID);
+  return new MachineCodeForInstruction();  // Invoke constructor!
+}
+
+// Register the annotation with the annotation factory
+static struct Initializer {
+  Initializer() {
+    AnnotationManager::registerAnnotationFactory(MCFI_AID, &CreateMCFI);
+  }
+} RegisterAID;
+
+MachineCodeForInstruction &MachineCodeForInstruction::get(const Instruction *I){
+  return *(MachineCodeForInstruction*)I->getOrCreateAnnotation(MCFI_AID);
+}
+
+void MachineCodeForInstruction::destroy(const Instruction *I) {
+  I->deleteAnnotation(MCFI_AID);
+}
+
+
+MachineCodeForInstruction::MachineCodeForInstruction() : Annotation(MCFI_AID) {}
+
+MachineCodeForInstruction::~MachineCodeForInstruction() {
+  // Free the Value objects created to hold intermediate values
+  for (unsigned i=0, N=tempVec.size(); i < N; i++)
+    delete tempVec[i];
+  
+  // Free the MachineInstr objects allocated, if any.
+  for (unsigned i=0, N = size(); i < N; i++)
+    delete (*this)[i];
+}