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Add zjit_* instructions to profile the interpreter (https://github.com/Shopify/zjit/pull/16)

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* Add zjit_* instructions to profile the interpreter

* Rename FixnumPlus to FixnumAdd

* Update a comment about Invalidate

* Rename Guard to GuardType

* Rename Invalidate to PatchPoint

* Drop unneeded debug!()

* Plan on profiling the types

* Use the output of GuardType as type refined outputs
This commit is contained in:
Takashi Kokubun 2025-03-03 13:46:53 -08:00
parent 30db473389
commit 0a543daf15
Notes: git 2025-04-18 13:48:27 +00:00
22 changed files with 498 additions and 122 deletions
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18
vm.c
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@ -44,6 +44,8 @@
#include "ractor_core.h"
#include "vm_sync.h"
#include "shape.h"
#include "insns.inc"
#include "zjit.h"
#include "builtin.h"
@ -434,18 +436,26 @@ jit_compile(rb_execution_context_t *ec)
const rb_iseq_t *iseq = ec->cfp->iseq;
struct rb_iseq_constant_body *body = ISEQ_BODY(iseq);
// Increment the ISEQ's call counter and trigger JIT compilation if not compiled
#if USE_ZJIT
extern bool rb_zjit_enabled_p;
extern uint64_t rb_zjit_call_threshold;
// Number of calls used to profile a YARV instruction for ZJIT
#define ZJIT_PROFILE_COUNT 1
if (body->jit_entry == NULL && rb_zjit_enabled_p) {
body->jit_entry_calls++;
// At call-threshold - ZJIT_PROFILE_COUNT, rewrite some of the YARV
// instructions to zjit_* instructions to profile these instructions.
if (body->jit_entry_calls + ZJIT_PROFILE_COUNT == rb_zjit_call_threshold) {
rb_zjit_profile_iseq(iseq);
}
// At call-threshold, compile the ISEQ with ZJIT.
if (body->jit_entry_calls == rb_zjit_call_threshold) {
extern void rb_zjit_compile_iseq(const rb_iseq_t *iseq, rb_execution_context_t *ec, bool jit_exception);
rb_zjit_compile_iseq(iseq, ec, false);
}
}
#elif USE_YJIT
// Increment the ISEQ's call counter and trigger JIT compilation if not compiled
if (body->jit_entry == NULL && rb_yjit_enabled_p) {
body->jit_entry_calls++;
if (rb_yjit_threshold_hit(iseq, body->jit_entry_calls)) {