ARM backend contribution from Apple.

llvm-svn: 33353

1 files changed, 55 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMConstantPoolValue.cpp b/llvm/lib/Target/ARM/ARMConstantPoolValue.cpp
new file mode 100644
index 00000000000..97cca07d33f
--- /dev/null
+++ b/llvm/lib/Target/ARM/ARMConstantPoolValue.cpp
@@ -0,0 +1,55 @@
+//===- ARMConstantPoolValue.cpp - ARM constantpool value --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Evan Cheng and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the ARM specific constantpool value class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARMConstantPoolValue.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/GlobalValue.h"
+using namespace llvm;
+
+ARMConstantPoolValue::ARMConstantPoolValue(GlobalValue *gv, unsigned id,
+                                         bool isNonLazy, unsigned char PCAdj)
+  : MachineConstantPoolValue((const Type*)gv->getType()),
+    GV(gv), LabelId(id), isNonLazyPtr(isNonLazy), PCAdjust(PCAdj) {}
+
+int ARMConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
+                                                    unsigned Alignment) {
+  unsigned AlignMask = (1 << Alignment)-1;
+  const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
+  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
+    if (Constants[i].isMachineConstantPoolEntry() &&
+        (Constants[i].Offset & AlignMask) == 0) {
+      ARMConstantPoolValue *CPV =
+        (ARMConstantPoolValue *)Constants[i].Val.MachineCPVal;
+      if (CPV->GV == GV && CPV->LabelId == LabelId &&
+          CPV->isNonLazyPtr == isNonLazyPtr)
+        return i;
+    }
+  }
+
+  return -1;
+}
+
+void
+ARMConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
+  ID.AddPointer(GV);
+  ID.AddInteger(LabelId);
+  ID.AddInteger((unsigned)isNonLazyPtr);
+  ID.AddInteger(PCAdjust);
+}
+
+void ARMConstantPoolValue::print(std::ostream &O) const {
+  O << GV->getName();
+  if (isNonLazyPtr) O << "$non_lazy_ptr";
+  if (PCAdjust != 0) O << "-(LPIC" << LabelId << "+"
+                       << (unsigned)PCAdjust << ")";
+}