[PATCH] D93811: [VE] Support llvm.eh.sjlj.lsda

[Kazushi Marukawa via Phabricator via llvm-commits]

kaz7 created this revision.
kaz7 added reviewers: simoll, k-ishizaka.
kaz7 added projects: LLVM, VE.
Herald added a subscriber: hiraditya.
kaz7 requested review of this revision.
Herald added a subscriber: llvm-commits.

In order to support SJLJ exception, implement llvm.eh.sjlj.lsda first.
Add regression test also.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D93811

Files:
  llvm/lib/Target/VE/VEISelLowering.cpp
  llvm/lib/Target/VE/VEISelLowering.h
  llvm/test/CodeGen/VE/Scalar/builtin_sjlj_lsda.ll


Index: llvm/test/CodeGen/VE/Scalar/builtin_sjlj_lsda.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/VE/Scalar/builtin_sjlj_lsda.ll
@@ -0,0 +1,16 @@
+; RUN: llc < %s -mtriple=ve -exception-model sjlj | FileCheck %s
+
+; Function Attrs: noinline nounwind optnone
+define i8* @test_lsda() {
+; CHECK-LABEL: test_lsda:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    lea %s0, GCC_except_table0 at lo
+; CHECK-NEXT:    and %s0, %s0, (32)0
+; CHECK-NEXT:    lea.sl %s0, GCC_except_table0 at hi(, %s0)
+; CHECK-NEXT:    b.l.t (, %s10)
+  %ret = call i8* @llvm.eh.sjlj.lsda()
+  ret i8* %ret
+}
+
+; Function Attrs: nounwind
+declare i8* @llvm.eh.sjlj.lsda()
Index: llvm/lib/Target/VE/VEISelLowering.h
===================================================================
--- llvm/lib/Target/VE/VEISelLowering.h
+++ llvm/lib/Target/VE/VEISelLowering.h
@@ -115,6 +115,7 @@
   SDValue lowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const;
+  SDValue lowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerJumpTable(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const;
Index: llvm/lib/Target/VE/VEISelLowering.cpp
===================================================================
--- llvm/lib/Target/VE/VEISelLowering.cpp
+++ llvm/lib/Target/VE/VEISelLowering.cpp
@@ -275,6 +275,9 @@
   }
 
   /// } Atomic isntructions
+
+  // Intrinsic instructions
+  setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
 }
 
 void VETargetLowering::initVPUActions() {
@@ -1534,6 +1537,40 @@
                      MachinePointerInfo());
 }
 
+SDValue VETargetLowering::lowerINTRINSIC_WO_CHAIN(SDValue Op,
+                                                  SelectionDAG &DAG) const {
+  SDLoc DL(Op);
+  unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+  switch (IntNo) {
+  default: // Don't custom lower most intrinsics.
+    return SDValue();
+  case Intrinsic::eh_sjlj_lsda: {
+    MachineFunction &MF = DAG.getMachineFunction();
+    const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+    MVT PtrVT = TLI.getPointerTy(DAG.getDataLayout());
+    const VETargetMachine *TM =
+        static_cast<const VETargetMachine *>(&DAG.getTarget());
+
+    // Creat GCC_except_tableXX string.  The real symbol for that will be
+    // generated in EHStreamer::emitExceptionTable() later.  So, we just
+    // borrow it's name here.
+    TM->getStrList()->push_back(std::string(
+        (Twine("GCC_except_table") + Twine(MF.getFunctionNumber())).str()));
+    SDValue Addr =
+        DAG.getTargetExternalSymbol(TM->getStrList()->back().c_str(), PtrVT, 0);
+    if (isPositionIndependent()) {
+      Addr = makeHiLoPair(Addr, VEMCExpr::VK_VE_GOTOFF_HI32,
+                          VEMCExpr::VK_VE_GOTOFF_LO32, DAG);
+      SDValue GlobalBase = DAG.getNode(VEISD::GLOBAL_BASE_REG, DL, PtrVT);
+      return DAG.getNode(ISD::ADD, DL, PtrVT, GlobalBase, Addr);
+    } else {
+      return makeHiLoPair(Addr, VEMCExpr::VK_VE_HI32, VEMCExpr::VK_VE_LO32,
+                          DAG);
+    }
+  }
+  }
+}
+
 static SDValue getSplatValue(SDNode *N) {
   if (auto *BuildVec = dyn_cast<BuildVectorSDNode>(N)) {
     return BuildVec->getSplatValue();
@@ -1580,6 +1617,8 @@
     return lowerGlobalAddress(Op, DAG);
   case ISD::GlobalTLSAddress:
     return lowerGlobalTLSAddress(Op, DAG);
+  case ISD::INTRINSIC_WO_CHAIN:
+    return lowerINTRINSIC_WO_CHAIN(Op, DAG);
   case ISD::JumpTable:
     return lowerJumpTable(Op, DAG);
   case ISD::LOAD:


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