[maglev][arm] Fix shift to zero

Arm does a shift of 32 if the immediate is equal to 0.

Fixed: chromium:1459681
Bug: v8:7700
Change-Id: I358756fd2921498f4080ffbcdcf4a44ce7a579a0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4664108
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#88615}

src/maglev/arm/maglev-ir-arm.cc

@@ -482,15 +482,15 @@ DEF_BITWISE_BINOP(Int32BitwiseXor, eor)
     Register out = ToRegister(result());                                       \
     if (Int32Constant* constant =                                              \
             right_input().node()->TryCast<Int32Constant>()) {                  \
-      if (constant->value() == 0) {                                            \
+      uint32_t shift = constant->value() & 31;                                 \
+      if (shift == 0) {                                                        \
         /* TODO(victorgomes): Arm will do a shift of 32 if right == 0. Ideally \
          * we should not even emit the shift in the first place. We do a move  \
          * here for the moment. */                                             \
         __ Move(out, left);                                                    \
         return;                                                                \
       }                                                                        \
-      __ opcode(out, left,                                                     \
-                Operand(static_cast<uint32_t>(constant->value()) & 31));       \
+      __ opcode(out, left, Operand(shift));                                    \
     } else {                                                                   \
       MaglevAssembler::ScratchRegisterScope temps(masm);                       \
       Register scratch = temps.Acquire();                                      \