If we support structs as va_list, we must pass pointers to them to va_copy

See last commit for LangRef, this implements it on all targets.

llvm-svn: 22273

1 files changed, 12 insertions, 5 deletions

diff --git a/llvm/lib/Target/SparcV9/SparcV9BurgISel.cpp b/llvm/lib/Target/SparcV9/SparcV9BurgISel.cpp
index cc2c81f3bb7..a6722b1862f 100644
--- a/llvm/lib/Target/SparcV9/SparcV9BurgISel.cpp
+++ b/llvm/lib/Target/SparcV9/SparcV9BurgISel.cpp
@@ -2881,11 +2881,18 @@ static bool CodeGenIntrinsic(Intrinsic::ID iid, CallInst &callInstr,
     return true;                        // no-op on SparcV9
 
   case Intrinsic::vacopy:
-    // Simple store of current va_list (arg2) to new va_list (arg1)
-    mvec.push_back(BuildMI(V9::STXi, 3).
-                   addReg(callInstr.getOperand(2)).
-                   addReg(callInstr.getOperand(1)).addSImm(0));
-    return true;
+    {
+      MachineCodeForInstruction& m1 = MachineCodeForInstruction::get(&callInstr);
+      TmpInstruction* VReg = 
+        new TmpInstruction(m1, callInstr.getOperand(1)->getType());
+      
+      // Simple store of current va_list (arg2) to new va_list (arg1)
+      mvec.push_back(BuildMI(V9::LDXi, 3).
+                     addReg(callInstr.getOperand(2)).addSImm(0).addRegDef(VReg));
+      mvec.push_back(BuildMI(V9::STXi, 3).
+                     addReg(VReg).addReg(callInstr.getOperand(1)).addSImm(0));
+      return true;
+    }
   }
 }