Allow machine instructions with variable numbers of arguments.

This is used only by Phi for now.

llvm-svn: 336

1 files changed, 12 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 64fcaa05771..d3e468cc2eb 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -19,13 +19,24 @@
 
 //************************ Class Implementations **************************/
 
-
+// Constructor for instructions with fixed #operands (nearly all)
 MachineInstr::MachineInstr(MachineOpCode _opCode,
 			   OpCodeMask    _opCodeMask)
   : opCode(_opCode),
     opCodeMask(_opCodeMask),
     operands(TargetInstrDescriptors[_opCode].numOperands)
 {
+  assert(TargetInstrDescriptors[_opCode].numOperands >= 0);
+}
+
+// Constructor for instructions with variable #operands
+MachineInstr::MachineInstr(MachineOpCode _opCode,
+			   unsigned	 numOperands,
+			   OpCodeMask    _opCodeMask)
+  : opCode(_opCode),
+    opCodeMask(_opCodeMask),
+    operands(numOperands)
+{
 }
 
 void