change OperandsSignature to use SmallVector<char> instead of std::vector<string>

since the strings are always exactly one character, and there are usually only 2-3 operands.

llvm-svn: 129678

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenInstruction.h b/llvm/utils/TableGen/CodeGenInstruction.h
index 6d2d8fba0cf..5f1e0bea766 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.h
+++ b/llvm/utils/TableGen/CodeGenInstruction.h
@@ -137,6 +137,7 @@ namespace llvm {
     bool isVariadic;
 
     // Provide transparent accessors to the operand list.
+    bool empty() const { return OperandList.empty(); }
     unsigned size() const { return OperandList.size(); }
     const OperandInfo &operator[](unsigned i) const { return OperandList[i]; }
     OperandInfo &operator[](unsigned i) { return OperandList[i]; }