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[Guile-commits] 02/03: Maybe enter JIT when returning from interpreted f
From: |
Andy Wingo |
Subject: |
[Guile-commits] 02/03: Maybe enter JIT when returning from interpreted functions |
Date: |
Wed, 29 Aug 2018 12:44:55 -0400 (EDT) |
wingo pushed a commit to branch lightning
in repository guile.
commit 24d09b16b60c6c8f0dee8e3cd69de0e677601ee7
Author: Andy Wingo <address@hidden>
Date: Wed Aug 29 17:54:19 2018 +0200
Maybe enter JIT when returning from interpreted functions
* libguile/jit.c (scm_jit_compute_mcode): Minor optimization.
* libguile/vm-engine.c (return-values): Maybe return to JIT code.
---
libguile/jit.c | 13 +++++--------
libguile/vm-engine.c | 21 ++++++++++++++-------
2 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/libguile/jit.c b/libguile/jit.c
index c9328d2..867ee7f 100644
--- a/libguile/jit.c
+++ b/libguile/jit.c
@@ -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);
-
- /* 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;
+ uint8_t *mcode_start = data->mcode;
+ const uint32_t *vcode_start = (const uint32_t *) (((char *)data) +
data->start);
+
+ if (mcode_start && vcode_start == thread->vm.ip)
+ return mcode_start;
return NULL;
}
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
index c8db813..58ff53c 100644
--- a/libguile/vm-engine.c
+++ b/libguile/vm-engine.c
@@ -565,18 +565,25 @@ 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);
- NEXT (0);
+ 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);
+ }
}