[stubs] Add SmiMax and refactor SmiMin to use Select

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index 75f56479e144f72c2a15d540cece42bc86290e6b..90f97240acf03afb54803c049834482196e289bf 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -349,19 +349,12 @@ Node* CodeStubAssembler::SmiLessThanOrEqual(Node* a, Node* b) {
   return IntPtrLessThanOrEqual(a, b);
 }
 
+Node* CodeStubAssembler::SmiMax(Node* a, Node* b) {
+  return Select(SmiLessThan(a, b), b, a);
+}
+
 Node* CodeStubAssembler::SmiMin(Node* a, Node* b) {
-  // TODO(bmeurer): Consider using Select once available.
-  Variable min(this, MachineRepresentation::kTagged);
-  Label if_a(this), if_b(this), join(this);
-  BranchIfSmiLessThan(a, b, &if_a, &if_b);
-  Bind(&if_a);
-  min.Bind(a);
-  Goto(&join);
-  Bind(&if_b);
-  min.Bind(b);
-  Goto(&join);
-  Bind(&join);
-  return min.value();
+  return Select(SmiLessThan(a, b), a, b);
 }
 
 Node* CodeStubAssembler::SmiMod(Node* a, Node* b) {