[llvm-commits] CVS: llvm/lib/Target/X86/X86ISelLowering.cpp

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

X86ISelLowering.cpp updated: 1.96 -> 1.97
---
Log message:

Added a common about the need for X86ISD::Wrapper.

---
Diffs of the changes:  (+7 -0)

 X86ISelLowering.cpp |    7 +++++++
 1 files changed, 7 insertions(+)


Index: llvm/lib/Target/X86/X86ISelLowering.cpp
diff -u llvm/lib/Target/X86/X86ISelLowering.cpp:1.96 llvm/lib/Target/X86/X86ISelLowering.cpp:1.97
--- llvm/lib/Target/X86/X86ISelLowering.cpp:1.96	Thu Feb 23 14:41:18 2006
+++ llvm/lib/Target/X86/X86ISelLowering.cpp	Sat Feb 25 03:55:19 2006
@@ -1829,6 +1829,13 @@
     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(),