[PPC64] Don't relocate in case of allocation failure

In the test compiler/codecache/TestStressCodeBuffers.java we see today 2 times the following assertion (when running with fastdebug binaries) :

# Internal Error (/workspace/openjdk-jdk-dev-aix_ppc64-dbg/jdk/src/hotspot/share/asm/codeBuffer.hpp:212), pid=8257968, tid=3599
# assert(allocates2(pc)) failed: relocation addr must be in this section
#
# JRE version: OpenJDK Runtime Environment (23.0) (fastdebug build 23-internal-adhoc.sapmachine.jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 23-internal-adhoc.sapmachine.jdk, compiled mode, compressed oops, compressed class ptrs, g1 gc, aix-ppc64)
 .....

--------------- T H R E A D ---------------

Current thread (0x00000001154140b0): JavaThread "C2 CompilerThread0" daemon [_thread_in_native, id=3599, stack(0x0000000115420000,0x000000011581d888) (4086K)]


Current CompileTask:
C2:3266 461 b sun.invoke.util.Wrapper::forBasicType (103 bytes)

Stack: [0x0000000115420000,0x000000011581d888], sp=0x0000000115819a80, free space=4070k
No context given, using current context.
Native frame:
iar: 0x09000000056bdc18 libjvm.so::AixNativeCallstack::print_callstack_for_context(outputStream*, ucontext_t const*, bool, char*, unsigned long)+0x4cc (C++ uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:5 parmsonstk:1)
lr: 0x09000000051989b4 libjvm.so::fdStream::write(char const*, unsigned long)+0x44 (C++ uses_alloca saves_lr stores_bc gpr_saved:4 fixedparms:3 parmsonstk:1)
sp: 0x0000000115818d40 (base - 0x4B48)
rtoc: 0x08001000a03d9960
|---stackaddr----| |----lrsave------|: <function name>
0x0000000115819130 - 0x09000000056bd6d8 libjvm.so::os::Aix::platform_print_native_stack(outputStream*, void const*, char*, int, unsigned char*&)+0x24 (C++ uses_alloca saves_lr stores_bc gpr_saved:1 fixedparms:5 parmsonstk:1)
0x00000001158191b0 - 0x09000000051a96b0 libjvm.so::VMError::report(outputStream*, bool)+0x1c0c (C++ fp_present uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:2 parmsonstk:1)
0x0000000115819a90 - 0x0900000005197dc8 libjvm.so::VMError::report_and_die(int, char const*, char const*, char*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x7cc (C++ uses_alloca saves_lr stores_bc gpr_saved:18 fixedparms:8 parmsonstk:1)
0x0000000115819c80 - 0x09000000051975b0 libjvm.so::VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, char*)+0x58 (C++ uses_alloca saves_lr stores_bc gpr_saved:2 fixedparms:7 parmsonstk:1)
0x0000000115819d20 - 0x0900000005197290 libjvm.so::report_vm_error(char const*, int, char const*, char const*, ...)+0x8c (C++ uses_alloca saves_lr stores_bc gpr_saved:5 fixedparms:4 parmsonstk:1)
0x0000000115819dc0 - 0x090000000522bc58 libjvm.so::CodeSection::relocate(unsigned char*, RelocationHolder const&, int)+0x3b0 (C++ uses_alloca saves_cr saves_lr stores_bc gpr_saved:12 fixedparms:4 parmsonstk:1)
0x0000000115819e90 - 0x0900000005b64600 libjvm.so::loadConP_hiNode::emit(CodeBuffer&, PhaseRegAlloc*) const+0x210 (C++ uses_alloca saves_lr stores_bc gpr_saved:9 fixedparms:3 parmsonstk:1)
0x0000000115819fb0 - 0x0900000005fa7760 libjvm.so::PhaseOutput::fill_buffer(CodeBuffer*, unsigned int*)+0x1678 (C++ uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:3 parmsonstk:1)
0x000000011581a3d0 - 0x0900000005f9e2a0 libjvm.so::PhaseOutput::Output()+0x8d8 (C++ fp_present uses_alloca saves_lr stores_bc gpr_saved:12 fixedparms:1 parmsonstk:1)
0x000000011581a4a0 - 0x0900000005f3e7e4 libjvm.so::Compile::Code_Gen()+0x3dc (C++ uses_alloca saves_lr stores_bc gpr_saved:6 fixedparms:1 parmsonstk:1)
0x000000011581b0e0 - 0x0900000005fbbb8c libjvm.so::Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0x1718 (C++ fp_present uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:6 parmsonstk:1)
0x000000011581bd50 - 0x09000000061cc780 libjvm.so::C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x25c (C++ uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:6 parmsonstk:1)
0x000000011581ca90 - 0x09000000054de564 libjvm.so::CompileBroker::invoke_compiler_on_method(CompileTask*)+0xcb4 (C++ fp_present uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 fixedparms:1 parmsonstk:1)
0x000000011581d210 - 0x09000000054cec80 libjvm.so::CompileBroker::compiler_thread_loop()+0x4c0 (C++ fp_present uses_alloca saves_cr saves_lr stores_bc gpr_saved:18 parmsonstk:1)
0x000000011581d460 - 0x09000000054ce740 libjvm.so::CompilerThread::thread_entry(JavaThread*, JavaThread*)+0x58 (C++ uses_alloca saves_lr stores_bc gpr_saved:1 fixedparms:2 parmsonstk:1)
0x000000011581d4e0 - 0x090000000536c7f8 libjvm.so::JavaThread::thread_main_inner()+0x1f8 (C++ uses_alloca saves_lr stores_bc gpr_saved:4 fixedparms:1 parmsonstk:1)
0x000000011581d5b0 - 0x090000000536a8e0 libjvm.so::JavaThread::run()+0x214 (C++ uses_alloca saves_lr stores_bc gpr_saved:5 fixedparms:1 parmsonstk:1)
0x000000011581d650 - 0x0900000005298640 libjvm.so::Thread::call_run()+0x128 (C++ uses_alloca saves_lr stores_bc gpr_saved:3 fixedparms:1 parmsonstk:1)
0x000000011581d6e0 - 0x0900000005297b34 libjvm.so::thread_native_entry(Thread*)+0x194 (C++ uses_alloca saves_lr stores_bc gpr_saved:9 fixedparms:1 parmsonstk:1)
0x000000011581d7a0 - 0x090000000056204c libpthreads.a::_pthread_body+0xec (C saves_lr stores_bc gpr_saved:1 fixedparms:1 )
0x000000011581d820 - 0x0000000000000000
*** end of backchain ***
-----------------------