[llvm] r238336 - SelectionDAG: Don't do libcall on div/rem if divrem is custom

[Jan Vesely]

Author: jvesely
Date: Wed May 27 11:54:09 2015
New Revision: 238336

URL: http://llvm.org/viewvc/llvm-project?rev=238336&view=rev
Log:
SelectionDAG: Don't do libcall on div/rem if divrem is custom

v2: TargetLoweringBase:: -> TargetLowering::
    Use Ops array
v3: Explicitly use value 0 for ?DIV
    Remove redundant newline

Differential revision: http://reviews.llvm.org/D7803
reviewer: ab

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp?rev=238336&r1=238335&r2=238336&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp Wed May 27 11:54:09 2015
@@ -2134,6 +2134,13 @@ void DAGTypeLegalizer::ExpandIntRes_SDIV
                                          SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
   SDLoc dl(N);
+  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
+
+  if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLowering::Custom) {
+    SDValue Res = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT), Ops);
+    SplitInteger(Res.getValue(0), Lo, Hi);
+    return;
+  }
 
   RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
   if (VT == MVT::i16)
@@ -2146,7 +2153,6 @@ void DAGTypeLegalizer::ExpandIntRes_SDIV
     LC = RTLIB::SDIV_I128;
   assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SDIV!");
 
-  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
   SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, 2, true, dl).first, Lo, Hi);
 }
 
@@ -2313,6 +2319,13 @@ void DAGTypeLegalizer::ExpandIntRes_SREM
                                          SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
   SDLoc dl(N);
+  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
+
+  if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLowering::Custom) {
+    SDValue Res = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT), Ops);
+    SplitInteger(Res.getValue(1), Lo, Hi);
+    return;
+  }
 
   RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
   if (VT == MVT::i16)
@@ -2325,7 +2338,6 @@ void DAGTypeLegalizer::ExpandIntRes_SREM
     LC = RTLIB::SREM_I128;
   assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SREM!");
 
-  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
   SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, 2, true, dl).first, Lo, Hi);
 }
 
@@ -2454,6 +2466,13 @@ void DAGTypeLegalizer::ExpandIntRes_UDIV
                                          SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
   SDLoc dl(N);
+  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
+
+  if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLowering::Custom) {
+    SDValue Res = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT), Ops);
+    SplitInteger(Res.getValue(0), Lo, Hi);
+    return;
+  }
 
   RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
   if (VT == MVT::i16)
@@ -2466,7 +2485,6 @@ void DAGTypeLegalizer::ExpandIntRes_UDIV
     LC = RTLIB::UDIV_I128;
   assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UDIV!");
 
-  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
   SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, 2, false, dl).first, Lo, Hi);
 }
 
@@ -2474,6 +2492,13 @@ void DAGTypeLegalizer::ExpandIntRes_UREM
                                          SDValue &Lo, SDValue &Hi) {
   EVT VT = N->getValueType(0);
   SDLoc dl(N);
+  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
+
+  if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLowering::Custom) {
+    SDValue Res = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT), Ops);
+    SplitInteger(Res.getValue(1), Lo, Hi);
+    return;
+  }
 
   RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
   if (VT == MVT::i16)
@@ -2486,7 +2511,6 @@ void DAGTypeLegalizer::ExpandIntRes_UREM
     LC = RTLIB::UREM_I128;
   assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UREM!");
 
-  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
   SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, 2, false, dl).first, Lo, Hi);
 }