DAG: Use sincos vector libcalls through RuntimeLibcalls (#166984)

Copy new process from sincospi.

Author: arsenm

llvm/include/llvm/CodeGen/BasicTTIImpl.h

@@ -334,7 +334,12 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
 
       break;
     case Intrinsic::sincos:
-      LC = RTLIB::getSINCOS(ScalarVT);
+      LC = RTLIB::getSINCOS(VT);
+      if (LC == RTLIB::UNKNOWN_LIBCALL)
+        LC = RTLIB::getSINCOS(ScalarVT);
+      else if (VT.isVector())
+        IsVectorCall = true;
+
       break;
     default:
       return std::nullopt;

llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp

@@ -1268,10 +1268,12 @@ void VectorLegalizer::Expand(SDNode *Node, SmallVectorImpl<SDValue> &Results) {
       return;
 
     break;
-
+  case ISD::FSINCOS:
   case ISD::FSINCOSPI: {
     EVT VT = Node->getValueType(0);
-    RTLIB::Libcall LC = RTLIB::getSINCOSPI(VT);
+    RTLIB::Libcall LC = Node->getOpcode() == ISD::FSINCOS
+                            ? RTLIB::getSINCOS(VT)
+                            : RTLIB::getSINCOSPI(VT);
     if (LC != RTLIB::UNKNOWN_LIBCALL &&
         DAG.expandMultipleResultFPLibCall(LC, Node, Results, VT))
       return;
@@ -1280,14 +1282,6 @@ void VectorLegalizer::Expand(SDNode *Node, SmallVectorImpl<SDValue> &Results) {
     // scalarizing.
     break;
   }
-  case ISD::FSINCOS: {
-    // FIXME: Try to directly match vector case like fsincospi
-    EVT VT = Node->getValueType(0).getVectorElementType();
-    RTLIB::Libcall LC = RTLIB::getSINCOS(VT);
-    if (DAG.expandMultipleResultFPLibCall(LC, Node, Results, VT))
-      return;
-    break;
-  }
   case ISD::FMODF: {
     EVT VT = Node->getValueType(0).getVectorElementType();
     RTLIB::Libcall LC = RTLIB::getMODF(VT);

llvm/lib/CodeGen/TargetLoweringBase.cpp

@@ -424,6 +424,24 @@ RTLIB::Libcall RTLIB::getCOS(EVT RetVT) {
 }
 
 RTLIB::Libcall RTLIB::getSINCOS(EVT RetVT) {
+  // TODO: Tablegen should generate this function
+  if (RetVT.isVector()) {
+    if (!RetVT.isSimple())
+      return RTLIB::UNKNOWN_LIBCALL;
+    switch (RetVT.getSimpleVT().SimpleTy) {
+    case MVT::v4f32:
+      return RTLIB::SINCOS_V4F32;
+    case MVT::v2f64:
+      return RTLIB::SINCOS_V2F64;
+    case MVT::nxv4f32:
+      return RTLIB::SINCOS_NXV4F32;
+    case MVT::nxv2f64:
+      return RTLIB::SINCOS_NXV2F64;
+    default:
+      return RTLIB::UNKNOWN_LIBCALL;
+    }
+  }
+
   return getFPLibCall(RetVT, SINCOS_F32, SINCOS_F64, SINCOS_F80, SINCOS_F128,
                       SINCOS_PPCF128);
 }