commit 0e0da734bbdfa1d3f55cd04db31d83b97e4556f7
author Jim Grosbach <grosbach@apple.com> Tue May 12 23:59:14 2009 +0000
committer Jim Grosbach <grosbach@apple.com> Tue May 12 23:59:14 2009 +0000
tree aa04b7f115b464f914893e1e637c808794af646e
parent 9d3094b38e51c85e93fc5a9c8ab23c95b73f78d4

Add support for GCC compatible builtin setjmp and longjmp intrinsics. This is
a supporting preliminary patch for GCC-compatible SjLJ exception handling. Note that these intrinsics are not designed to be invoked directly by the user, but
rather used by the front-end as target hooks for exception handling.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71610 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMISelLowering.cpp

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 7704209..48e197d 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -1035,14 +1035,19 @@
   return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
 }
 
-static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
+SDValue
+ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
   MVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
   unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+  DebugLoc dl = Op.getDebugLoc();
   switch (IntNo) {
   default: return SDValue();    // Don't custom lower most intrinsics.
   case Intrinsic::arm_thread_pointer:
-      return DAG.getNode(ARMISD::THREAD_POINTER, DebugLoc::getUnknownLoc(),
-                         PtrVT);
+      return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
+  case Intrinsic::builtinsetjmp:
+      SDValue Res = DAG.getNode(ARMISD::BUILTIN_SETJMP, dl, MVT::i32,
+                         Op.getOperand(1));
+      return Res;
   }
 }
 
@@ -1431,6 +1436,20 @@
   return DAG.getNode(ARMISD::CNEG, dl, VT, AbsVal, AbsVal, ARMCC, CCR, Cmp);
 }
 
+SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
+  MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+  MFI->setFrameAddressIsTaken(true);
+  MVT VT = Op.getValueType();
+  DebugLoc dl = Op.getDebugLoc();  // FIXME probably not meaningful
+  unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
+  unsigned FrameReg = (Subtarget->isThumb() || Subtarget->useThumbBacktraces())
+    ? ARM::R7 : ARM::R11;
+  SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
+  while (Depth--)
+    FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, NULL, 0);
+  return FrameAddr;
+}
+
 SDValue
 ARMTargetLowering::EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
                                            SDValue Chain,
@@ -1612,7 +1631,7 @@
   case ISD::FCOPYSIGN:     return LowerFCOPYSIGN(Op, DAG);
   case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG);
   case ISD::RETURNADDR:    break;
-  case ISD::FRAMEADDR:     break;
+  case ISD::FRAMEADDR:     return LowerFRAMEADDR(Op, DAG);
   case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
   case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
   case ISD::BIT_CONVERT:   return ExpandBIT_CONVERT(Op.getNode(), DAG);