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[mono][aot] Enable direct call transformation for MONO_PATCH_INFO_METHOD #82711

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[mono][aot] Enable direct call transformation for MONO_PATCH_INFO_METHOD #82711

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9c91a8e
Enable direct call transformation where caller requires no initializa…
kotlarmilos Feb 27, 2023
8f995a1
Callee can specialize
kotlarmilos Feb 27, 2023
882353e
Use m_class_has_cctor method to check if class requires no initializa…
kotlarmilos Feb 28, 2023
1a182a1
Move the condition into is_direct_callable
kotlarmilos Mar 1, 2023
282fb7e
Revert last commit
kotlarmilos Mar 2, 2023
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Use m_class_has_cctor method to check if class requires no initializa… 
…tion
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@kotlarmilos
kotlarmilos committed Feb 28, 2023
commit 882353ea456b8dcbb738dce9cfa16afc1600526c
2 changes: 1 addition & 1 deletion src/mono/mono/mini/aot-compiler.c
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Expand Up @@ -6591,7 +6591,7 @@ emit_and_reloc_code (MonoAotCompile *acfg, MonoMethod *method, guint8 *code, gui
MonoCompile *callee_cfg = (MonoCompile *)g_hash_table_lookup (acfg->method_to_cfg, cmethod);

// Enable direct call transformation where caller's class requires no initialization and callee can specialize
if (!m_class_has_static_refs (method->klass) && mono_aot_can_specialize (cmethod)) {
if (!m_class_has_cctor (method->klass) && mono_aot_can_specialize (cmethod)) {
char *name = mono_aot_get_mangled_method_name (cmethod);
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@vargaz vargaz Mar 2, 2023

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Looked into why this was not enabled before, and i don't think this is going to work. The callee method might use GOT slots etc. which are not initialized if the method is directly called. So before this can be enabled, the AOTed code needs to be changed to init itself, the same way the llvm compiled code does.

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@kotlarmilos kotlarmilos Mar 3, 2023

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Good point! Let's first try to enable method initialization during the invocation before proceeding with this and other direct call transformations.

mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_AOT, "DIRECT CALL: %s by %s", name, method ? mono_method_full_name (method, TRUE) : "");
g_free (name);
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