Make ReplaceATOMIC_BINARY_64 a static function. Use a nested switch to reduce to only a single call to it thus allowing it to be inlined by the compiler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162088 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 30 insertions, 19 deletions

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 0db6a3e..8abc5b0 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -11202,9 +11202,9 @@ static void ReplaceATOMIC_LOAD(SDNode *Node,
   Results.push_back(Swap.getValue(1));
 }
 
-void X86TargetLowering::
+static void
 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
-                        SelectionDAG &DAG, unsigned NewOp) const {
+                        SelectionDAG &DAG, unsigned NewOp) {
   DebugLoc dl = Node->getDebugLoc();
   assert (Node->getValueType(0) == MVT::i64 &&
           "Only know how to expand i64 atomics");
@@ -11325,26 +11325,40 @@ void X86TargetLowering::ReplaceNodeResults(SDNode *N,
     return;
   }
   case ISD::ATOMIC_LOAD_ADD:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
-    return;
   case ISD::ATOMIC_LOAD_AND:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
-    return;
   case ISD::ATOMIC_LOAD_NAND:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
-    return;
   case ISD::ATOMIC_LOAD_OR:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
-    return;
   case ISD::ATOMIC_LOAD_SUB:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
-    return;
   case ISD::ATOMIC_LOAD_XOR:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
-    return;
-  case ISD::ATOMIC_SWAP:
-    ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
+  case ISD::ATOMIC_SWAP: {
+    unsigned Opc;
+    switch (N->getOpcode()) {
+    default: llvm_unreachable("Unexpected opcode");
+    case ISD::ATOMIC_LOAD_ADD:
+      Opc = X86ISD::ATOMADD64_DAG;
+      break;
+    case ISD::ATOMIC_LOAD_AND:
+      Opc = X86ISD::ATOMAND64_DAG;
+      break;
+    case ISD::ATOMIC_LOAD_NAND:
+      Opc = X86ISD::ATOMNAND64_DAG;
+      break;
+    case ISD::ATOMIC_LOAD_OR:
+      Opc = X86ISD::ATOMOR64_DAG;
+      break;
+    case ISD::ATOMIC_LOAD_SUB:
+      Opc = X86ISD::ATOMSUB64_DAG;
+      break;
+    case ISD::ATOMIC_LOAD_XOR:
+      Opc = X86ISD::ATOMXOR64_DAG;
+      break;
+    case ISD::ATOMIC_SWAP:
+      Opc = X86ISD::ATOMSWAP64_DAG;
+      break;
+    }
+    ReplaceATOMIC_BINARY_64(N, Results, DAG, Opc);
     return;
+  }
   case ISD::ATOMIC_LOAD:
     ReplaceATOMIC_LOAD(N, Results, DAG);
   }
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index c8a04c0..896d067 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -864,9 +864,6 @@ namespace llvm {
                    const SmallVectorImpl<ISD::OutputArg> &Outs,
                    LLVMContext &Context) const;
 
-    void ReplaceATOMIC_BINARY_64(SDNode *N, SmallVectorImpl<SDValue> &Results,
-                                 SelectionDAG &DAG, unsigned NewOp) const;
-
     /// Utility function to emit string processing sse4.2 instructions
     /// that return in xmm0.
     /// This takes the instruction to expand, the associated machine basic