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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2010-06-26 18:22:20 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2010-06-26 18:22:20 +0000 |
| commit | 72d13ff755fe8484c89468252f945ba23fe98f71 (patch) | |
| tree | 053e915fdae2948c982c6009a8bf4fd0413dd164 /lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | |
| parent | de4fe231392165c7566081fb3f86aee4f6a4e0d6 (diff) | |
| download | external_llvm-72d13ff755fe8484c89468252f945ba23fe98f71.tar.gz external_llvm-72d13ff755fe8484c89468252f945ba23fe98f71.tar.bz2 external_llvm-72d13ff755fe8484c89468252f945ba23fe98f71.zip | |
When splitting a VAARG, remember its alignment.
This produces terrible but correct code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106952 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index f360a01737..8fb4654853 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -2642,15 +2642,29 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node, EVT VT = Node->getValueType(0); Tmp1 = Node->getOperand(0); Tmp2 = Node->getOperand(1); - SDValue VAList = DAG.getLoad(TLI.getPointerTy(), dl, Tmp1, Tmp2, V, 0, - false, false, 0); + unsigned Align = Node->getConstantOperandVal(3); + + SDValue VAListLoad = DAG.getLoad(TLI.getPointerTy(), dl, Tmp1, Tmp2, V, 0, + false, false, 0); + SDValue VAList = VAListLoad; + + if (Align != 0 ) { + VAList = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(), VAList, + DAG.getConstant(Align - 1, + TLI.getPointerTy())); + + VAList = DAG.getNode(ISD::AND, dl, TLI.getPointerTy(), VAList, + DAG.getConstant(-Align, + TLI.getPointerTy())); + } + // Increment the pointer, VAList, to the next vaarg Tmp3 = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(), VAList, DAG.getConstant(TLI.getTargetData()-> getTypeAllocSize(VT.getTypeForEVT(*DAG.getContext())), TLI.getPointerTy())); // Store the incremented VAList to the legalized pointer - Tmp3 = DAG.getStore(VAList.getValue(1), dl, Tmp3, Tmp2, V, 0, + Tmp3 = DAG.getStore(VAListLoad.getValue(1), dl, Tmp3, Tmp2, V, 0, false, false, 0); // Load the actual argument out of the pointer VAList Results.push_back(DAG.getLoad(VT, dl, Tmp3, VAList, NULL, 0, |