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| author | Evan Cheng <evan.cheng@apple.com> | 2006-02-25 09:55:19 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2006-02-25 09:55:19 +0000 |
| commit | bbbb2fbbde673d2e23b83722510c03bc8c67c70a (patch) | |
| tree | efc4aee6e586f18761fdfb89c82bf2198f56a729 /lib/Target/X86/X86ISelLowering.cpp | |
| parent | 404cb4f9fa2df50eac4d84b8a77c84a92188c6d5 (diff) | |
Added a common about the need for X86ISD::Wrapper.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26372 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index e2f22ae0a3..48e049c617 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1829,6 +1829,13 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { return DAG.getNode(X86ISD::REP_MOVS, MVT::Other, Chain, DAG.getValueType(AVT), InFlag); } + + // ConstantPool, GlobalAddress, and ExternalSymbol are lowered as their + // target countpart wrapped in the X86ISD::Wrapper node. Suppose N is + // one of the above mentioned nodes. It has to be wrapped because otherwise + // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only + // be used to form addressing mode. These wrapped nodes will be selected + // into MOV32ri. case ISD::ConstantPool: { ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op); SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(), |