Jump tables on Alpha
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30463 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index a9649ab..bcd60ed 100644
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -48,7 +48,7 @@
addRegisterClass(MVT::f64, Alpha::F8RCRegisterClass);
addRegisterClass(MVT::f32, Alpha::F4RCRegisterClass);
- setOperationAction(ISD::BRIND, MVT::i64, Expand);
+ // setOperationAction(ISD::BRIND, MVT::i64, Expand);
setOperationAction(ISD::BR_CC, MVT::Other, Expand);
setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
@@ -128,6 +128,8 @@
setOperationAction(ISD::RET, MVT::Other, Custom);
+ setOperationAction(ISD::JumpTable, MVT::i64, Custom);
+
setStackPointerRegisterToSaveRestore(Alpha::R30);
setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
@@ -162,6 +164,20 @@
}
}
+static SDOperand LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
+ MVT::ValueType PtrVT = Op.getValueType();
+ JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
+ SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
+ SDOperand Zero = DAG.getConstant(0, PtrVT);
+
+ const TargetMachine &TM = DAG.getTarget();
+
+ SDOperand Hi = DAG.getNode(AlphaISD::GPRelHi, MVT::i64, JTI,
+ DAG.getNode(AlphaISD::GlobalBaseReg, MVT::i64));
+ SDOperand Lo = DAG.getNode(AlphaISD::GPRelLo, MVT::i64, JTI, Hi);
+ return Lo;
+}
+
//http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/
//AA-PY8AC-TET1_html/callCH3.html#BLOCK21
@@ -395,6 +411,8 @@
VarArgsOffset,
GP, RA);
case ISD::RET: return LowerRET(Op,DAG, getVRegRA());
+ case ISD::JumpTable: return LowerJumpTable(Op, DAG);
+
case ISD::SINT_TO_FP: {
assert(MVT::i64 == Op.getOperand(0).getValueType() &&
"Unhandled SINT_TO_FP type in custom expander!");