[TurboFan] Change representation of NumberConstant in 32-bit arch

Smi constants in 32 bit machines are guaranteed to be 31 bits.

Bug: chromium:1254189
Change-Id: I4ea296a7212c5e6ea14119fbd71cfb5789762b55
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3195874
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77185}

src/compiler/effect-control-linearizer.cc

@@ -4743,6 +4743,12 @@ Node* EffectControlLinearizer::ChangeSmiToIntPtr(Node* value) {
         __ ChangeInt32ToInt64(__ TruncateInt64ToInt32(value)),
         SmiShiftBitsConstant());
   }
+  if (machine()->Is32() && value->opcode() == IrOpcode::kNumberConstant) {
+    // Smi constants are guaranteed to be 31 bits.
+    double number = OpParameter<double>(value->op());
+    return __ WordSarShiftOutZeros(
+        __ Int32Constant(static_cast<int32_t>(number)), SmiShiftBitsConstant());
+  }
   return __ WordSarShiftOutZeros(value, SmiShiftBitsConstant());
 }