8349150: Support precompiled headers on AIX

Reviewed-by: jkern, erikj

make/hotspot/lib/CompileJvm.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2013, 2024, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2013, 2025, Oracle and/or its affiliates. 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
@@ -125,9 +125,7 @@ else ifeq ($(call And, $(call isTargetOs, linux) $(call isTargetCpu, aarch64)),
   endif
 endif
 
-ifeq ($(call isTargetOs, linux macosx windows), true)
-  JVM_PRECOMPILED_HEADER := $(TOPDIR)/src/hotspot/share/precompiled/precompiled.hpp
-endif
+JVM_PRECOMPILED_HEADER := $(TOPDIR)/src/hotspot/share/precompiled/precompiled.hpp
 
 ifeq ($(call isTargetCpu, x86), true)
   JVM_EXCLUDE_PATTERNS += x86_64

make/hotspot/lib/JvmOverrideFiles.gmk

@@ -118,11 +118,7 @@ else ifeq ($(call isTargetOs, macosx), true)
   endif
 
 else ifeq ($(call isTargetOs, aix), true)
-  ifeq ($(TOOLCHAIN_TYPE), clang)
-    BUILD_LIBJVM_synchronizer.cpp_CXXFLAGS := -fno-inline
-  else
-    BUILD_LIBJVM_synchronizer.cpp_CXXFLAGS := -qnoinline
-  endif
+  BUILD_LIBJVM_synchronizer.cpp_CXXFLAGS := -fno-inline
   BUILD_LIBJVM_sharedRuntimeTrans.cpp_CXXFLAGS := $(CXX_O_FLAG_NONE)
   # Disable aggressive optimizations for functions in sharedRuntimeTrig.cpp
   # and sharedRuntimeTrans.cpp on ppc64.
@@ -146,6 +142,13 @@ else ifeq ($(call isTargetOs, aix), true)
   # Disable ELF decoder on AIX (AIX uses XCOFF).
   JVM_EXCLUDE_PATTERNS += elf
 
+  JVM_PRECOMPILED_HEADER_EXCLUDE := \
+      sharedRuntimeTrig.cpp \
+      sharedRuntimeTrans.cpp \
+      synchronizer.cpp \
+      $(OPT_SPEED_SRC) \
+      #
+
 else ifeq ($(call isTargetOs, windows), true)
   JVM_PRECOMPILED_HEADER_EXCLUDE := \
       bytecodeInterpreter.cpp \