Changes in directory llvm/lib/CodeGen/SelectionDAG:
SelectionDAGISel.cpp updated: 1.171 -> 1.172
---
Log message:
Implement (most of) selection of inline asm memory operands.
---
Diffs of the changes: (+42 -0)
SelectionDAGISel.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.171
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.172
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1.171 Thu Feb 23
19:11:24 2006
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Thu Feb 23 20:13:54 2006
@@ -2437,3 +2437,45 @@
BB = SL->Run();
delete SL;
}
+
+/// SelectInlineAsmMemoryOperands - Calls to this are automatically generated
+/// by tblgen. Others should not call it.
+void SelectionDAGISel::
+SelectInlineAsmMemoryOperands(std::vector<SDOperand> &Ops, SelectionDAG &DAG) {
+ std::vector<SDOperand> InOps;
+ std::swap(InOps, Ops);
+
+ Ops.push_back(InOps[0]); // input chain.
+ Ops.push_back(InOps[1]); // input asm string.
+
+ const char *AsmStr = cast<ExternalSymbolSDNode>(InOps[1])->getSymbol();
+ unsigned i = 2, e = InOps.size();
+ if (InOps[e-1].getValueType() == MVT::Flag)
+ --e; // Don't process a flag operand if it is here.
+
+ while (i != e) {
+ unsigned Flags = cast<ConstantSDNode>(InOps[i])->getValue();
+ if ((Flags & 7) != 4 /*MEM*/) {
+ // Just skip over this operand, copying the operands verbatim.
+ Ops.insert(Ops.end(), InOps.begin()+i, InOps.begin()+i+(Flags >> 3) + 1);
+ i += (Flags >> 3) + 1;
+ } else {
+ assert((Flags >> 3) == 1 && "Memory operand with multiple values?");
+ // Otherwise, this is a memory operand. Ask the target to select it.
+ std::vector<SDOperand> SelOps;
+ if (SelectInlineAsmMemoryOperand(InOps[i+1], 'm', SelOps, DAG)) {
+ std::cerr << "Could not match memory address. Inline asm failure!\n";
+ exit(1);
+ }
+
+ // Add this to the output node.
+ Ops.push_back(DAG.getConstant(4/*MEM*/ | (SelOps.size() << 3),
MVT::i32));
+ Ops.insert(Ops.end(), SelOps.begin(), SelOps.end());
+ i += 2;
+ }
+ }
+
+ // Add the flag input back if present.
+ if (e != InOps.size())
+ Ops.push_back(InOps.back());
+}
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