[SystemZ] Use CLST to implement strcmp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188544 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 15 insertions, 1 deletions

diff --git a/include/llvm/Target/TargetLibraryInfo.h b/include/llvm/Target/TargetLibraryInfo.h
index d0245ba..a033d07 100644
--- a/include/llvm/Target/TargetLibraryInfo.h
+++ b/include/llvm/Target/TargetLibraryInfo.h
@@ -699,7 +699,7 @@ public:
     case LibFunc::trunc:     case LibFunc::truncf:     case LibFunc::truncl:
     case LibFunc::log2:      case LibFunc::log2f:      case LibFunc::log2l:
     case LibFunc::exp2:      case LibFunc::exp2f:      case LibFunc::exp2l:
-    case LibFunc::memcmp:
+    case LibFunc::memcmp:    case LibFunc::strcmp:
       return true;
     }
     return false;
diff --git a/include/llvm/Target/TargetSelectionDAGInfo.h b/include/llvm/Target/TargetSelectionDAGInfo.h
index 35da1d7..2d0989c 100644
--- a/include/llvm/Target/TargetSelectionDAGInfo.h
+++ b/include/llvm/Target/TargetSelectionDAGInfo.h
@@ -108,6 +108,20 @@ public:
                           MachinePointerInfo Op2PtrInfo) const {
     return std::make_pair(SDValue(), SDValue());
   }
+
+  /// EmitTargetCodeForStrcmp - Emit target-specific code that performs a
+  /// strcmp, in cases where that is faster than a libcall.  The first
+  /// returned SDValue is the result of the strcmp and the second is
+  /// the chain.  Both SDValues can be null if a normal libcall should
+  /// be used.
+  virtual std::pair<SDValue, SDValue>
+  EmitTargetCodeForStrcmp(SelectionDAG &DAG, SDLoc dl,
+                          SDValue Chain,
+                          SDValue Op1, SDValue Op2,
+                          MachinePointerInfo Op1PtrInfo,
+                          MachinePointerInfo Op2PtrInfo) const {
+    return std::make_pair(SDValue(), SDValue());
+  }
 };
 
 } // end llvm namespace