The attached patches implement most of the ARM AAPCS-VFP hard float

ABI. The missing piece is support for putting "homogeneous aggregates"
into registers.

Patch by Sandeep Patel!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73095 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 2 deletions

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index ca3a9cb..a413ee6 100644
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -549,6 +549,10 @@ 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())
+      break;
+
     unsigned Val = cast<ConstantSDNode>(N)->getZExtValue();
     bool UseCP = true;
     if (Subtarget->isThumb())
@@ -559,6 +563,7 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
       UseCP = (ARM_AM::getSOImmVal(Val) == -1 &&     // MOV
                ARM_AM::getSOImmVal(~Val) == -1 &&    // MVN
                !ARM_AM::isSOImmTwoPartVal(Val));     // two instrs.
+
     if (UseCP) {
       SDValue CPIdx =
         CurDAG->getTargetConstantPool(ConstantInt::get(Type::Int32Ty, Val),
@@ -570,7 +575,7 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
                                         CPIdx, CurDAG->getEntryNode());
       else {
         SDValue Ops[] = {
-          CPIdx, 
+          CPIdx,
           CurDAG->getRegister(0, MVT::i32),
           CurDAG->getTargetConstant(0, MVT::i32),
           getAL(CurDAG),
@@ -583,7 +588,7 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
       ReplaceUses(Op, SDValue(ResNode, 0));
       return NULL;
     }
-      
+
     // Other cases are autogenerated.
     break;
   }