avoid this libcall with long inline expansion
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78420 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelLowering.cpp b/lib/Target/Alpha/AlphaISelLowering.cpp
index e11ed7c..0c50567 100644
--- a/lib/Target/Alpha/AlphaISelLowering.cpp
+++ b/lib/Target/Alpha/AlphaISelLowering.cpp
@@ -107,7 +107,7 @@
setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
- setOperationAction(ISD::SRL_PARTS, MVT::i64, Expand);
+ setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
setOperationAction(ISD::SRA_PARTS, MVT::i64, Expand);
setOperationAction(ISD::SHL_PARTS, MVT::i64, Expand);
@@ -578,6 +578,35 @@
}
}
+ case ISD::SRL_PARTS: {
+ SDValue ShOpLo = Op.getOperand(0);
+ SDValue ShOpHi = Op.getOperand(1);
+ SDValue ShAmt = Op.getOperand(2);
+ SDValue bm = DAG.getNode(ISD::SUB, dl, MVT::i64,
+ DAG.getConstant(64, MVT::i64), ShAmt);
+ SDValue BMCC = DAG.getSetCC(dl, MVT::i64, bm,
+ DAG.getConstant(0, MVT::i64), ISD::SETLE);
+ // if 64 - shAmt <= 0
+ SDValue Hi_Neg = DAG.getConstant(0, MVT::i64);
+ SDValue ShAmt_Neg = DAG.getNode(ISD::SUB, dl, MVT::i64,
+ DAG.getConstant(0, MVT::i64), bm);
+ SDValue Lo_Neg = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt_Neg);
+ // else
+ SDValue carries = DAG.getNode(ISD::SHL, dl, MVT::i64, ShOpHi, bm);
+ SDValue Hi_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpHi, ShAmt);
+ SDValue Lo_Pos = DAG.getNode(ISD::SRL, dl, MVT::i64, ShOpLo, ShAmt);
+ Lo_Pos = DAG.getNode(ISD::OR, dl, MVT::i64, Lo_Pos, carries);
+ // Merge
+ SDValue Hi = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Hi_Neg, Hi_Pos);
+ SDValue Lo = DAG.getNode(ISD::SELECT, dl, MVT::i64, BMCC, Lo_Neg, Lo_Pos);
+ SDValue Ops[2] = { Lo, Hi };
+ return DAG.getMergeValues(Ops, 2, dl);
+ }
+ // case ISD::SRA_PARTS:
+
+ // case ISD::SHL_PARTS:
+
+
case ISD::SINT_TO_FP: {
assert(Op.getOperand(0).getValueType() == MVT::i64 &&
"Unhandled SINT_TO_FP type in custom expander!");