ARM64: Fix and improve --trace-sim register trace.

src/arm64/instructions-arm64.h

Index: src/arm64/instructions-arm64.h
diff --git a/src/arm64/instructions-arm64.h b/src/arm64/instructions-arm64.h
index bd4e753779467abf2caa39a2e869987f1b58fb91..9f3c20f702c5a376a888ce34d20d7d1c96f0ecff 100644
--- a/src/arm64/instructions-arm64.h
+++ b/src/arm64/instructions-arm64.h
@@ -352,9 +352,9 @@ class Instruction {
   // Patch a literal load instruction to load from 'source'.
   void SetImmLLiteral(Instruction* source);
 
-  uint8_t* LiteralAddress() {
+  uintptr_t LiteralAddress() {
     int offset = ImmLLiteral() << kLoadLiteralScaleLog2;
-    return reinterpret_cast<uint8_t*>(this) + offset;
+    return reinterpret_cast<uintptr_t>(this) + offset;
   }
 
   enum CheckAlignment { NO_CHECK, CHECK_ALIGNMENT };