[builtins] Unify Atanh, Cbrt and Expm1 as exports from flibm.

src/compiler/machine-operator-reducer.cc

Index: src/compiler/machine-operator-reducer.cc
diff --git a/src/compiler/machine-operator-reducer.cc b/src/compiler/machine-operator-reducer.cc
index b2437de6473dbe7e26b4f687d3c8a53624fa0a26..07d6820f069ebcf4d878269770fb6abed934784c 100644
--- a/src/compiler/machine-operator-reducer.cc
+++ b/src/compiler/machine-operator-reducer.cc
@@ -396,11 +396,21 @@ Reduction MachineOperatorReducer::Reduce(Node* node) {
       }
       break;
     }
+    case IrOpcode::kFloat64Atanh: {
+      Float64Matcher m(node->InputAt(0));
+      if (m.HasValue()) return ReplaceFloat64(base::ieee754::atanh(m.Value()));
+      break;
+    }
     case IrOpcode::kFloat64Exp: {
       Float64Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceFloat64(base::ieee754::exp(m.Value()));
       break;
     }
+    case IrOpcode::kFloat64Expm1: {
+      Float64Matcher m(node->InputAt(0));
+      if (m.HasValue()) return ReplaceFloat64(base::ieee754::expm1(m.Value()));
+      break;
+    }
     case IrOpcode::kFloat64Log: {
       Float64Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceFloat64(base::ieee754::log(m.Value()));
@@ -421,6 +431,11 @@ Reduction MachineOperatorReducer::Reduce(Node* node) {
       if (m.HasValue()) return ReplaceFloat64(base::ieee754::log10(m.Value()));
       break;
     }
+    case IrOpcode::kFloat64Cbrt: {
+      Float64Matcher m(node->InputAt(0));
+      if (m.HasValue()) return ReplaceFloat64(base::ieee754::cbrt(m.Value()));
+      break;
+    }
     case IrOpcode::kChangeFloat32ToFloat64: {
       Float32Matcher m(node->InputAt(0));
       if (m.HasValue()) return ReplaceFloat64(m.Value());