rewrite EmitConvertToMCInst to iterate over the MCInst operands,
filling them in one at a time. Previously this iterated over the
asmoperands, which left the problem of "holes". The new approach
simplifies things.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118104 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index 78c88d7..24bdbe2 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -102,7 +102,18 @@
const std::string &EMN, unsigned MION, unsigned MINO,
DagInit *MIOI)
: Rec(R), Name(N), PrinterMethodName(PMN), EncoderMethodName(EMN),
- MIOperandNo(MION), MINumOperands(MINO), MIOperandInfo(MIOI) {}
+ MIOperandNo(MION), MINumOperands(MINO), MIOperandInfo(MIOI) {}
+
+
+ /// getTiedOperand - If this operand is tied to another one, return the
+ /// other operand number. Otherwise, return -1.
+ int getTiedRegister() const {
+ for (unsigned j = 0, e = Constraints.size(); j != e; ++j) {
+ const CGIOperandList::ConstraintInfo &CI = Constraints[j];
+ if (CI.isTied()) return CI.getTiedOperand();
+ }
+ return -1;
+ }
};
CGIOperandList(Record *D);