diff --git a/src/codegen/register-base.h b/src/codegen/register-base.h
index 10bdc759ba..6d9432360f 100644
--- a/src/codegen/register-base.h
+++ b/src/codegen/register-base.h
@@ -34,7 +34,7 @@ class RegisterBase {
   static constexpr SubType no_reg() { return SubType{kCode_no_reg}; }
 
   static constexpr SubType from_code(int8_t code) {
-    DCHECK(base::IsInRange(static_cast<int>(code), 0, kNumRegisters - 1));
+    V8_ASSUME(code >= 0 && code < kNumRegisters);
     return SubType{code};
   }
 
diff --git a/src/wasm/baseline/liftoff-register.h b/src/wasm/baseline/liftoff-register.h
index ea7eaec235..6bc3652d16 100644
--- a/src/wasm/baseline/liftoff-register.h
+++ b/src/wasm/baseline/liftoff-register.h
@@ -446,13 +446,13 @@ class LiftoffRegList {
   }
 
   LiftoffRegister GetFirstRegSet() const {
-    DCHECK(!is_empty());
+    V8_ASSUME(regs_ != 0);
     int first_code = base::bits::CountTrailingZeros(regs_);
     return LiftoffRegister::from_liftoff_code(first_code);
   }
 
   LiftoffRegister GetLastRegSet() const {
-    DCHECK(!is_empty());
+    V8_ASSUME(regs_ != 0);
     int last_code =
         8 * sizeof(regs_) - 1 - base::bits::CountLeadingZeros(regs_);
     return LiftoffRegister::from_liftoff_code(last_code);