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add ISD::STACKADDR to get the current stack pointer. Will be used by sjlj EH

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to update the jmpbuf in the presence of VLAs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104862 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-05-27 18:23:48 +00:00
parent aa02ff1a2b
commit ad9aaf038e
3 changed files with 12 additions and 0 deletions
include/llvm/CodeGen
ISDOpcodes.h
lib/Target/ARM
ARMISelLowering.cppARMISelLowering.h

3
include/llvm/CodeGen/ISDOpcodes.h

@ -72,6 +72,9 @@ namespace ISD {
// parent's frame or return address, and so on.
FRAMEADDR, RETURNADDR,
// STACKADDR - The current stack pointer address.
STACKADDR,
// FRAME_TO_ARGS_OFFSET - This node represents offset from frame pointer to
// first (possible) on-stack argument. This is needed for correct stack
// adjustment during unwind.

8
lib/Target/ARM/ARMISelLowering.cpp

@ -2183,6 +2183,13 @@ SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
return FrameAddr;
}
SDValue ARMTargetLowering::LowerSTACKADDR(SDValue Op, SelectionDAG &DAG) const {
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
SDValue StackAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, ARM::SP, VT);
return StackAddr;
}
/// ExpandBIT_CONVERT - If the target supports VFP, this function is called to
/// expand a bit convert where either the source or destination type is i64 to
/// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
@ -3187,6 +3194,7 @@ SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
case ISD::STACKADDR: return LowerSTACKADDR(Op, DAG);
case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);

1
lib/Target/ARM/ARMISelLowering.h

@ -305,6 +305,7 @@ namespace llvm {
SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerSTACKADDR(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerShiftRightParts(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerShiftLeftParts(SDValue Op, SelectionDAG &DAG) const;