diff options
author | Anton Korobeynikov <asl@math.spbu.ru> | 2007-07-14 14:06:15 +0000 |
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committer | Anton Korobeynikov <asl@math.spbu.ru> | 2007-07-14 14:06:15 +0000 |
commit | 2365f51ed03afe6993bae962fdc2e5a956a64cd5 (patch) | |
tree | 8b31c4075bfb21456ae1257eb68b2368220f7840 /lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | |
parent | a73d11efd435cfa5ab275400c9881724f9224ca0 (diff) |
Long live the exception handling!
This patch fills the last necessary bits to enable exceptions
handling in LLVM. Currently only on x86-32/linux.
In fact, this patch adds necessary intrinsics (and their lowering) which
represent really weird target-specific gcc builtins used inside unwinder.
After corresponding llvm-gcc patch will land (easy) exceptions should be
more or less workable. However, exceptions handling support should not be
thought as 'finished': I expect many small and not so small glitches
everywhere.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39855 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 87bf249764..8a2f7b1f5f 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -2721,6 +2721,53 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { return 0; } + case Intrinsic::eh_return: { + MachineModuleInfo *MMI = DAG.getMachineModuleInfo(); + + if (MMI && ExceptionHandling) { + MMI->setCallsEHReturn(true); + DAG.setRoot(DAG.getNode(ISD::EH_RETURN, + MVT::Other, + getRoot(), + getValue(I.getOperand(1)), + getValue(I.getOperand(2)))); + } else { + setValue(&I, DAG.getConstant(0, TLI.getPointerTy())); + } + + return 0; + } + + case Intrinsic::eh_unwind_init: { + if (MachineModuleInfo *MMI = DAG.getMachineModuleInfo()) { + MMI->setCallsUnwindInit(true); + } + + return 0; + } + + case Intrinsic::eh_dwarf_cfa: { + if (ExceptionHandling) { + MVT::ValueType VT = getValue(I.getOperand(1)).getValueType(); + SDOperand Offset = DAG.getNode(ISD::ADD, + TLI.getPointerTy(), + DAG.getNode(ISD::FRAME_TO_ARGS_OFFSET, + VT), + getValue(I.getOperand(1))); + setValue(&I, DAG.getNode(ISD::ADD, + TLI.getPointerTy(), + DAG.getNode(ISD::FRAMEADDR, + TLI.getPointerTy(), + DAG.getConstant(0, + TLI.getPointerTy())), + Offset)); + } else { + setValue(&I, DAG.getConstant(0, TLI.getPointerTy())); + } + + return 0; + } + case Intrinsic::sqrt_f32: case Intrinsic::sqrt_f64: setValue(&I, DAG.getNode(ISD::FSQRT, |