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Maybe enter JIT when returning from interpreted functions

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* libguile/jit.c (scm_jit_compute_mcode): Minor optimization.
* libguile/vm-engine.c (return-values): Maybe return to JIT code.
This commit is contained in:
Andy Wingo 2018-08-29 17:54:19 +02:00
parent c03e2bbbb4
commit 24d09b16b6
2 changed files with 18 additions and 14 deletions
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11
libguile/jit.c
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@ -4425,14 +4425,11 @@ scm_sys_jit_compile (SCM fn)
const uint8_t *
scm_jit_compute_mcode (scm_thread *thread, struct scm_jit_function_data *data)
{
const uint32_t *start = (const uint32_t *) (((char *)data) + data->start);
uint8_t *mcode_start = data->mcode;
const uint32_t *vcode_start = (const uint32_t *) (((char *)data) + data->start);
/* Until the JIT is tested, don't automatically JIT-compile code.
Just return whatever code is already there. If we decide to buy
later, replace with something that wires up a call to
"compute_mcode". */
if (start == thread->vm.ip)
return data->mcode;
if (mcode_start && vcode_start == thread->vm.ip)
return mcode_start;
return NULL;
}

19
libguile/vm-engine.c
View file

@ -565,19 +565,26 @@ VM_NAME (scm_thread *thread)
{
union scm_vm_stack_element *old_fp;
size_t frame_size = 3;
uint8_t *mcode;
RETURN_HOOK ();
old_fp = VP->fp;
ip = SCM_FRAME_VIRTUAL_RETURN_ADDRESS (VP->fp);
VP->fp = SCM_FRAME_DYNAMIC_LINK (VP->fp);
/* Clear stack frame. */
while (frame_size--)
old_fp[frame_size].as_scm = SCM_BOOL_F;
VP->fp = SCM_FRAME_DYNAMIC_LINK (old_fp);
mcode = SCM_FRAME_MACHINE_RETURN_ADDRESS (old_fp);
if (mcode)
{
scm_jit_enter_mcode (thread, mcode);
CACHE_REGISTER ();
NEXT (0);
}
else
{
ip = SCM_FRAME_VIRTUAL_RETURN_ADDRESS (old_fp);
NEXT (0);
}
}