[mips] Fix code generation bug in handling of immediates

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index d48007b858e4fe13d326272be3c75a03be54b8e9..5d5c3898cb145af02fe12a0ca4b99f60f35ee67e 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -269,10 +269,9 @@ static void VisitBinop(InstructionSelector* selector, Node* node,
                         &inputs[1])) {
     inputs[0] = g.UseRegister(m.left().node());
     input_count++;
-  }
-  if (has_reverse_opcode &&
-      TryMatchImmediate(selector, &reverse_opcode, m.left().node(),
-                        &input_count, &inputs[1])) {
+  } else if (has_reverse_opcode &&
+             TryMatchImmediate(selector, &reverse_opcode, m.left().node(),
+                               &input_count, &inputs[1])) {
     inputs[0] = g.UseRegister(m.right().node());
     opcode = reverse_opcode;
     input_count++;