Add missing i64 max/min/umax/umin on 32-bit target

- Turn on atomic6432.ll and add specific test case as well



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164616 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index f8385cb..3a3c642 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2040,6 +2040,10 @@
   case X86ISD::ATOMSUB64_DAG:
   case X86ISD::ATOMNAND64_DAG:
   case X86ISD::ATOMAND64_DAG:
+  case X86ISD::ATOMMAX64_DAG:
+  case X86ISD::ATOMMIN64_DAG:
+  case X86ISD::ATOMUMAX64_DAG:
+  case X86ISD::ATOMUMIN64_DAG:
   case X86ISD::ATOMSWAP64_DAG: {
     unsigned Opc;
     switch (Opcode) {
@@ -2050,6 +2054,10 @@
     case X86ISD::ATOMSUB64_DAG:  Opc = X86::ATOMSUB6432;  break;
     case X86ISD::ATOMNAND64_DAG: Opc = X86::ATOMNAND6432; break;
     case X86ISD::ATOMAND64_DAG:  Opc = X86::ATOMAND6432;  break;
+    case X86ISD::ATOMMAX64_DAG:  Opc = X86::ATOMMAX6432;  break;
+    case X86ISD::ATOMMIN64_DAG:  Opc = X86::ATOMMIN6432;  break;
+    case X86ISD::ATOMUMAX64_DAG: Opc = X86::ATOMUMAX6432; break;
+    case X86ISD::ATOMUMIN64_DAG: Opc = X86::ATOMUMIN6432; break;
     case X86ISD::ATOMSWAP64_DAG: Opc = X86::ATOMSWAP6432; break;
     }
     SDNode *RetVal = SelectAtomic64(Node, Opc);