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

src/wasm/ast-decoder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/signature.h"
 
 #include "src/bit-vector.h"
 #include "src/flags.h"
 #include "src/handles.h"
 #include "src/zone/zone-containers.h"
@@ skipping 680 matching lines @@
             SetBlockType(&control_.back(), operand);
             len = 1 + operand.length;
             break;
           }
           case kExprIf: {
             // Condition on top of stack. Split environments for branches.
             BlockTypeOperand operand(this, pc_);
             Value cond = Pop(0, kAstI32);
             TFNode* if_true = nullptr;
             TFNode* if_false = nullptr;
-            BUILD(Branch, cond.node, &if_true, &if_false);
+            BUILD(BranchNoHint, cond.node, &if_true, &if_false);
             SsaEnv* end_env = ssa_env_;
             SsaEnv* false_env = Split(ssa_env_);
             false_env->control = if_false;
             SsaEnv* true_env = Steal(ssa_env_);
             true_env->control = if_true;
             PushIf(end_env, false_env);
             SetEnv("if:true", true_env);
             SetBlockType(&control_.back(), operand);
             len = 1 + operand.length;
             break;
@@ skipping 97 matching lines @@
               if (tval.type != kAstEnd && fval.type != kAstEnd) {
                 error("type mismatch in select");
                 break;
               }
             }
             if (build()) {
               DCHECK(tval.type != kAstEnd);
               DCHECK(fval.type != kAstEnd);
               DCHECK(cond.type != kAstEnd);
               TFNode* controls[2];
-              builder_->Branch(cond.node, &controls[0], &controls[1]);
+              builder_->BranchNoHint(cond.node, &controls[0], &controls[1]);
               TFNode* merge = builder_->Merge(2, controls);
               TFNode* vals[2] = {tval.node, fval.node};
               TFNode* phi = builder_->Phi(tval.type, 2, vals, merge);
               Push(tval.type, phi);
               ssa_env_->control = merge;
             } else {
               Push(tval.type, nullptr);
             }
             break;
           }
           case kExprBr: {
             BreakDepthOperand operand(this, pc_);
             if (Validate(pc_, operand, control_)) {
               BreakTo(operand.depth);
             }
             len = 1 + operand.length;
             EndControl();
             break;
           }
           case kExprBrIf: {
             BreakDepthOperand operand(this, pc_);
             Value cond = Pop(0, kAstI32);
             if (ok() && Validate(pc_, operand, control_)) {
               SsaEnv* fenv = ssa_env_;
               SsaEnv* tenv = Split(fenv);
               fenv->SetNotMerged();
-              BUILD(Branch, cond.node, &tenv->control, &fenv->control);
+              BUILD(BranchNoHint, cond.node, &tenv->control, &fenv->control);
               ssa_env_ = tenv;
               BreakTo(operand.depth);
               ssa_env_ = fenv;
             }
             len = 1 + operand.length;
             break;
           }
           case kExprBrTable: {
             BranchTableOperand operand(this, pc_);
             BranchTableIterator iterator(this, operand);
@@ skipping 1094 matching lines @@
 BitVector* AnalyzeLoopAssignmentForTesting(Zone* zone, size_t num_locals,
                                            const byte* start, const byte* end) {
   FunctionBody body = {nullptr, nullptr, nullptr, start, end};
   WasmFullDecoder decoder(zone, nullptr, body);
   return decoder.AnalyzeLoopAssignmentForTesting(start, num_locals);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8