[turbofan] Introduce integer multiplication with overflow.

src/base/bits.cc

Index: src/base/bits.cc
diff --git a/src/base/bits.cc b/src/base/bits.cc
index 9b949cc66f8e380a658fbb33dac8bc1e520622ec..909f9deb8c1682ebf8c729cc601781856d9166d0 100644
--- a/src/base/bits.cc
+++ b/src/base/bits.cc
@@ -78,6 +78,22 @@ int64_t SignedSaturatedSub64(int64_t lhs, int64_t rhs) {
   return FromCheckedNumeric(rv);
 }
 
+bool SignedMulOverflow32(int32_t lhs, int32_t rhs, int32_t* val) {
+  internal::CheckedNumeric<int32_t> rv(lhs);
+  rv *= rhs;
+  int32_t limit = std::numeric_limits<int32_t>::max();
+  *val = rv.ValueOrDefault(limit);
+  return !rv.IsValid();
+}
+
+bool SignedMulOverflow64(int64_t lhs, int64_t rhs, int64_t* val) {
+  internal::CheckedNumeric<int64_t> rv(lhs);
+  rv *= rhs;
+  int64_t limit = std::numeric_limits<int64_t>::max();
+  *val = rv.ValueOrDefault(limit);
+  return !rv.IsValid();
+}
+
 }  // namespace bits
 }  // namespace base
 }  // namespace v8