[wasm] Detect unrepresentability in the float32-to-int32 conversion correctly on arm.

src/wasm/wasm-interpreter.cc

 // Copyright 2016 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/wasm/wasm-interpreter.h"
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/decoder.h"
 #include "src/wasm/wasm-external-refs.h"
 #include "src/wasm/wasm-module.h"
 
@@ skipping 497 matching lines @@
 static int32_t ExecuteI32SConvertF64(double a, TrapReason* trap) {
   if (a < (static_cast<double>(INT32_MAX) + 1.0) &&
       a > (static_cast<double>(INT32_MIN) - 1.0)) {
     return static_cast<int32_t>(a);
   }
   *trap = kTrapFloatUnrepresentable;
   return 0;
 }
 
 static uint32_t ExecuteI32UConvertF32(float a, TrapReason* trap) {
-  if (a < (static_cast<float>(UINT32_MAX) + 1.0) && a > -1) {
+  if (a < (static_cast<float>(static_cast<uint64_t>(UINT32_MAX) + 1)) &&
+      a > -1) {
     return static_cast<uint32_t>(a);
   }
   *trap = kTrapFloatUnrepresentable;
   return 0;
 }
 
 static uint32_t ExecuteI32UConvertF64(double a, TrapReason* trap) {
   if (a < (static_cast<float>(UINT32_MAX) + 1.0) && a > -1) {
     return static_cast<uint32_t>(a);
   }
@@ skipping 1292 matching lines @@
 
 ControlTransferMap WasmInterpreter::ComputeControlTransfersForTesting(
     Zone* zone, const byte* start, const byte* end) {
   ControlTransfers targets(zone, 0, start, end);
   return targets.map_;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8