Finer-grained constant cache invalidation (take 2)

This commit reintroduces finer-grained constant cache invalidation.
After 8008fb7 got merged, it was causing issues on token-threaded
builds (such as on Windows).

The issue was that when you're iterating through instruction sequences
and using the translator functions to get back the instruction structs,
you're either using `rb_vm_insn_null_translator` or
`rb_vm_insn_addr2insn2` depending if it's a direct-threading build.
`rb_vm_insn_addr2insn2` does some normalization to always return to
you the non-trace version of whatever instruction you're looking at.
`rb_vm_insn_null_translator` does not do that normalization.

This means that when you're looping through the instructions if you're
trying to do an opcode comparison, it can change depending on the type
of threading that you're using. This can be very confusing. So, this
commit creates a new translator function
`rb_vm_insn_normalizing_translator` to always return the non-trace
version so that opcode comparisons don't have to worry about different
configurations.

[Feature #18589]

1 files changed, 2 insertions, 2 deletions

diff --git a/tool/ruby_vm/views/_mjit_compile_getinlinecache.erb b/tool/ruby_vm/views/_mjit_compile_getinlinecache.erb
index d4eb4977a4..fa38af4045 100644
--- a/tool/ruby_vm/views/_mjit_compile_getinlinecache.erb
+++ b/tool/ruby_vm/views/_mjit_compile_getinlinecache.erb
@@ -13,9 +13,9 @@
 
 % # compiler: Capture IC values, locking getinlinecache
     struct iseq_inline_constant_cache_entry *ice = ic->entry;
-    if (ice != NULL && GET_IC_SERIAL(ice) && !status->compile_info->disable_const_cache) {
+    if (ice != NULL && !status->compile_info->disable_const_cache) {
 %       # JIT: Inline everything in IC, and cancel the slow path
-        fprintf(f, "    if (vm_inlined_ic_hit_p(0x%"PRIxVALUE", 0x%"PRIxVALUE", (const rb_cref_t *)0x%"PRIxVALUE", %"PRI_SERIALT_PREFIX"u, reg_cfp->ep)) {", ice->flags, ice->value, (VALUE)ice->ic_cref, GET_IC_SERIAL(ice));
+        fprintf(f, "    if (vm_inlined_ic_hit_p(0x%"PRIxVALUE", 0x%"PRIxVALUE", (const rb_cref_t *)0x%"PRIxVALUE", reg_cfp->ep)) {", ice->flags, ice->value, (VALUE)ice->ic_cref);
         fprintf(f, "        stack[%d] = 0x%"PRIxVALUE";\n", b->stack_size, ice->value);
         fprintf(f, "        goto label_%d;\n", pos + insn_len(insn) + (int)dst);
         fprintf(f, "    }");