Index: lib/Target/X86/X86CallingConv.td
===================================================================
--- lib/Target/X86/X86CallingConv.td	(revision 150629)
+++ lib/Target/X86/X86CallingConv.td	(working copy)
@@ -333,6 +333,9 @@
 
   // The 'nest' parameter, if any, is passed in EAX.
   CCIfNest<CCAssignToReg<[EAX]>>,
+  
+  // Do not pass the sret argument in ECX     
+  CCIfSRet<CCDelegateTo<CC_X86_32_Common>>,
 
   // The first integer argument is passed in ECX
   CCIfType<[i32], CCAssignToReg<[ECX]>>,