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YJIT: Implement duphash (#5009)

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`duphash` showed up in the top-20 most frequent exit ops for @jhawthorn's benchmark that renders github.com/about

The implementation was almost exactly the same as `duparray`

Co-authored-by: John Hawthorn <john@hawthorn.email>

Co-authored-by: John Hawthorn <john@hawthorn.email>
This commit is contained in:
Ian C. Anderson 2021-10-25 10:40:33 -04:00 • committed by GitHub
parent 1c0c8d5da2
commit e943511455
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Notes: git 2021-10-25 23:40:55 +09:00 
Merged-By: maximecb <maximecb@ruby-lang.org>
3 changed files with 32 additions and 0 deletions
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10
bootstraptest/test_yjit.rb
View file

@ -2268,3 +2268,13 @@ assert_equal "true", %q{
expected == events
}
# duphash
assert_equal '{:foo=>123}', %q{
def foo
{foo: 123}
end
foo
foo
}

1
common.mk
View file

@ -16903,6 +16903,7 @@ yjit.$(OBJEXT): $(top_srcdir)/internal/class.h
yjit.$(OBJEXT): $(top_srcdir)/internal/compile.h
yjit.$(OBJEXT): $(top_srcdir)/internal/compilers.h
yjit.$(OBJEXT): $(top_srcdir)/internal/gc.h
yjit.$(OBJEXT): $(top_srcdir)/internal/hash.h
yjit.$(OBJEXT): $(top_srcdir)/internal/imemo.h
yjit.$(OBJEXT): $(top_srcdir)/internal/object.h
yjit.$(OBJEXT): $(top_srcdir)/internal/re.h

21
yjit_codegen.c
View file

@ -3,6 +3,7 @@
#include "gc.h"
#include "internal/compile.h"
#include "internal/class.h"
#include "internal/hash.h"
#include "internal/object.h"
#include "internal/sanitizers.h"
#include "internal/string.h"
@ -895,6 +896,25 @@ gen_duparray(jitstate_t *jit, ctx_t *ctx, codeblock_t *cb)
return YJIT_KEEP_COMPILING;
}
// dup hash
static codegen_status_t
gen_duphash(jitstate_t *jit, ctx_t *ctx, codeblock_t *cb)
{
VALUE hash = jit_get_arg(jit, 0);
// Save the PC and SP because we are allocating
jit_prepare_routine_call(jit, ctx, REG0);
// call rb_hash_resurrect(VALUE hash);
jit_mov_gc_ptr(jit, cb, C_ARG_REGS[0], hash);
call_ptr(cb, REG0, (void *)rb_hash_resurrect);
x86opnd_t stack_ret = ctx_stack_push(ctx, TYPE_HASH);
mov(cb, stack_ret, RAX);
return YJIT_KEEP_COMPILING;
}
VALUE rb_vm_splat_array(VALUE flag, VALUE ary);
// call to_a on the array on the stack
@ -4640,6 +4660,7 @@ yjit_init_codegen(void)
yjit_reg_op(BIN(adjuststack), gen_adjuststack);
yjit_reg_op(BIN(newarray), gen_newarray);
yjit_reg_op(BIN(duparray), gen_duparray);
yjit_reg_op(BIN(duphash), gen_duphash);
yjit_reg_op(BIN(splatarray), gen_splatarray);
yjit_reg_op(BIN(expandarray), gen_expandarray);
yjit_reg_op(BIN(newhash), gen_newhash);