8332904: ubsan ppc64le: c1_LIRGenerator_ppc.cpp:581:21: runtime error: signed integer overflow: 9223372036854775807 + 1 cannot be represented in type 'long int'

Reviewed-by: mdoerr, jkern

Author: MBaesken

src/hotspot/cpu/ppc/assembler_ppc.cpp

@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012, 2023 SAP SE. All rights reserved.
+ * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2024 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -78,9 +78,9 @@ int Assembler::branch_destination(int inst, int pos) {
 
 // Low-level andi-one-instruction-macro.
 void Assembler::andi(Register a, Register s, const long ui16) {
-  if (is_power_of_2(((jlong) ui16)+1)) {
+  if (is_power_of_2(((unsigned long) ui16)+1)) {
     // pow2minus1
-    clrldi(a, s, 64 - log2i_exact((((jlong) ui16)+1)));
+    clrldi(a, s, 64 - log2i_exact((((unsigned long) ui16)+1)));
   } else if (is_power_of_2((jlong) ui16)) {
     // pow2
     rlwinm(a, s, 0, 31 - log2i_exact((jlong) ui16), 31 - log2i_exact((jlong) ui16));

src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp

@@ -578,7 +578,7 @@ inline bool can_handle_logic_op_as_uimm(ValueType *type, Bytecodes::Code bc) {
        is_power_of_2(int_or_long_const) ||
        is_power_of_2(-int_or_long_const))) return true;
   if (bc == Bytecodes::_land &&
-      (is_power_of_2(int_or_long_const+1) ||
+      (is_power_of_2((unsigned long)int_or_long_const+1) ||
        (Assembler::is_uimm(int_or_long_const, 32) && is_power_of_2(int_or_long_const)) ||
        (int_or_long_const != min_jlong && is_power_of_2(-int_or_long_const)))) return true;