[wasm] Use branch hint for the -1 check in I(32|64)Div.

src/compiler/wasm-compiler.cc

Index: src/compiler/wasm-compiler.cc
diff --git a/src/compiler/wasm-compiler.cc b/src/compiler/wasm-compiler.cc
index f3c1c5819bf606f97230ba1dc6983d66b31b94ee..b6dc62be9394dc3cd98372021721a3ab96853a1f 100644
--- a/src/compiler/wasm-compiler.cc
+++ b/src/compiler/wasm-compiler.cc
@@ -990,16 +990,36 @@ Node* WasmGraphBuilder::HeapConstant(Handle<HeapObject> value) {
   return jsgraph()->HeapConstant(value);
 }
 
-Node* WasmGraphBuilder::Branch(Node* cond, Node** true_node,
-                               Node** false_node) {
+namespace {
+Node* Branch(JSGraph* jsgraph, Node* cond, Node** true_node, Node** false_node,
+             Node* control, BranchHint hint) {
   DCHECK_NOT_NULL(cond);
-  DCHECK_NOT_NULL(*control_);
+  DCHECK_NOT_NULL(control);
   Node* branch =
-      graph()->NewNode(jsgraph()->common()->Branch(), cond, *control_);
-  *true_node = graph()->NewNode(jsgraph()->common()->IfTrue(), branch);
-  *false_node = graph()->NewNode(jsgraph()->common()->IfFalse(), branch);
+      jsgraph->graph()->NewNode(jsgraph->common()->Branch(hint), cond, control);
+  *true_node = jsgraph->graph()->NewNode(jsgraph->common()->IfTrue(), branch);
+  *false_node = jsgraph->graph()->NewNode(jsgraph->common()->IfFalse(), branch);
   return branch;
 }
+}  // namespace
+
+Node* WasmGraphBuilder::BranchNoHint(Node* cond, Node** true_node,
+                                     Node** false_node) {
+  return Branch(jsgraph(), cond, true_node, false_node, *control_,
+                BranchHint::kNone);
+}
+
+Node* WasmGraphBuilder::BranchExpectTrue(Node* cond, Node** true_node,
+                                         Node** false_node) {
+  return Branch(jsgraph(), cond, true_node, false_node, *control_,
+                BranchHint::kTrue);
+}
+
+Node* WasmGraphBuilder::BranchExpectFalse(Node* cond, Node** true_node,
+                                          Node** false_node) {
+  return Branch(jsgraph(), cond, true_node, false_node, *control_,
+                BranchHint::kFalse);
+}
 
 Node* WasmGraphBuilder::Switch(unsigned count, Node* key) {
   return graph()->NewNode(jsgraph()->common()->Switch(count), key, *control_);
@@ -1758,7 +1778,7 @@ Node* WasmGraphBuilder::Catch(Node* input, wasm::WasmCodePosition position) {
 
   Node* is_smi;
   Node* is_heap;
-  Branch(BuildTestNotSmi(value), &is_heap, &is_smi);
+  BranchExpectFalse(BuildTestNotSmi(value), &is_heap, &is_smi);
 
   // is_smi
   Node* smi_i32 = BuildChangeSmiToInt32(value);
@@ -1798,7 +1818,7 @@ Node* WasmGraphBuilder::BuildI32DivS(Node* left, Node* right,
   Node* before = *control_;
   Node* denom_is_m1;
   Node* denom_is_not_m1;
-  Branch(
+  BranchExpectFalse(
       graph()->NewNode(m->Word32Equal(), right, jsgraph()->Int32Constant(-1)),
       &denom_is_m1, &denom_is_not_m1);
   *control_ = denom_is_m1;
@@ -1940,9 +1960,9 @@ Node* WasmGraphBuilder::BuildI64DivS(Node* left, Node* right,
   Node* before = *control_;
   Node* denom_is_m1;
   Node* denom_is_not_m1;
-  Branch(graph()->NewNode(jsgraph()->machine()->Word64Equal(), right,
-                          jsgraph()->Int64Constant(-1)),
-         &denom_is_m1, &denom_is_not_m1);
+  BranchExpectFalse(graph()->NewNode(jsgraph()->machine()->Word64Equal(), right,
+                                     jsgraph()->Int64Constant(-1)),
+                    &denom_is_m1, &denom_is_not_m1);
   *control_ = denom_is_m1;
   trap_->TrapIfEq64(wasm::kTrapDivUnrepresentable, left,
                     std::numeric_limits<int64_t>::min(), position);