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8353735: [JVMCI] Allow specifying storage kind of the callee save register

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Reviewed-by: dnsimon, cslucas
This commit is contained in:
Yudi Zheng 2025-05-09 08:39:16 +00:00
parent c88f94c9d7
commit 74e981e855
1 changed files with 11 additions and 1 deletions
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12
src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/code/RegisterConfig.java
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2009, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* *
* This code is free software; you can redistribute it and/or modify it * This code is free software; you can redistribute it and/or modify it
@ -94,6 +94,16 @@ public interface RegisterConfig {
*/ */
RegisterArray getCalleeSaveRegisters(); RegisterArray getCalleeSaveRegisters();
/**
* Returns the storage kind for a callee-save register, which determines how the register is
* saved and restored. For example, according to the Windows x64 ABI, the upper portions of
* XMM0-XMM15 are considered destroyed, so saving the full width of these registers is not
* necessary.
*/
default PlatformKind getCalleeSaveRegisterStorageKind(Architecture arch, Register calleeSaveRegister) {
return arch.getLargestStorableKind(calleeSaveRegister.getRegisterCategory());
}
/** /**
* Gets a map from register {@linkplain Register#number numbers} to register * Gets a map from register {@linkplain Register#number numbers} to register
* {@linkplain RegisterAttributes attributes} for this register configuration. * {@linkplain RegisterAttributes attributes} for this register configuration.