From a4c19d68f13cf0a83bc0da53bd6d547fcaf635fe Mon Sep 17 00:00:00 2001
From: ed <ed@FreeBSD.org>
Date: Mon, 22 Jun 2009 08:08:12 +0000
Subject: Update LLVM sources to r73879.

---
 lib/Target/ARM/ARMISelDAGToDAG.cpp | 40 +++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

(limited to 'lib/Target/ARM/ARMISelDAGToDAG.cpp')

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index ca3a9cb..1ed9e80 100644
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -52,8 +52,13 @@ public:
 
   virtual const char *getPassName() const {
     return "ARM Instruction Selection";
-  } 
-  
+  }
+
+ /// getI32Imm - Return a target constant with the specified value, of type i32.
+  inline SDValue getI32Imm(unsigned Imm) {
+    return CurDAG->getTargetConstant(Imm, MVT::i32);
+  }
+
   SDNode *Select(SDValue Op);
   virtual void InstructionSelect();
   bool SelectAddrMode2(SDValue Op, SDValue N, SDValue &Base,
@@ -84,6 +89,9 @@ public:
   bool SelectThumbAddrModeSP(SDValue Op, SDValue N, SDValue &Base,
                              SDValue &OffImm);
 
+  bool SelectShifterOperand(SDValue Op, SDValue N,
+                            SDValue &BaseReg, SDValue &Opc);
+
   bool SelectShifterOperandReg(SDValue Op, SDValue N, SDValue &A,
                                SDValue &B, SDValue &C);
   
@@ -509,8 +517,30 @@ bool ARMDAGToDAGISel::SelectThumbAddrModeSP(SDValue Op, SDValue N,
   return false;
 }
 
+bool ARMDAGToDAGISel::SelectShifterOperand(SDValue Op,
+                                           SDValue N,
+                                           SDValue &BaseReg,
+                                           SDValue &Opc) {
+  ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N);
+
+  // Don't match base register only case. That is matched to a separate
+  // lower complexity pattern with explicit register operand.
+  if (ShOpcVal == ARM_AM::no_shift) return false;
+
+  BaseReg = N.getOperand(0);
+  unsigned ShImmVal = 0;
+  if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1)))
+    ShImmVal = RHS->getZExtValue() & 31;
+  else
+    return false;
+
+  Opc = getI32Imm(ARM_AM::getSORegOpc(ShOpcVal, ShImmVal));
+
+  return true;
+}
+
 bool ARMDAGToDAGISel::SelectShifterOperandReg(SDValue Op,
-                                              SDValue N, 
+                                              SDValue N,
                                               SDValue &BaseReg,
                                               SDValue &ShReg,
                                               SDValue &Opc) {
@@ -549,6 +579,10 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
   switch (N->getOpcode()) {
   default: break;
   case ISD::Constant: {
+    // ARMv6T2 and later should materialize imms via MOV / MOVT pair.
+    if (Subtarget->hasV6T2Ops() || Subtarget->hasThumb2())
+      break;
+
     unsigned Val = cast<ConstantSDNode>(N)->getZExtValue();
     bool UseCP = true;
     if (Subtarget->isThumb())
-- 
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