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Fix assertion error running compile-file with threshold 0

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* libguile/jit.c (emit_alloc_frame_for_sp): Don't require that FP be in
  a register, but if it was and we call out, do restore it.
This commit is contained in:
Andy Wingo 2018-09-02 21:29:24 +02:00
parent 54b23adc13
commit e9b44c00fd
1 changed files with 3 additions and 3 deletions
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6
libguile/jit.c
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@ -681,8 +681,9 @@ static void
emit_alloc_frame_for_sp (scm_jit_state *j, jit_gpr_t t)
{
jit_node_t *k, *fast, *watermark;
uint32_t saved_state = save_reloadable_register_state (j);
ASSERT_HAS_REGISTER_STATE (SP_IN_REGISTER | FP_IN_REGISTER);
ASSERT_HAS_REGISTER_STATE (SP_IN_REGISTER);
emit_ldxi (j, t, THREAD, thread_offset_sp_min_since_gc);
fast = jit_bger (SP, t);
@ -692,8 +693,7 @@ emit_alloc_frame_for_sp (scm_jit_state *j, jit_gpr_t t)
/* Slow case: call out to expand stack. */
emit_store_current_ip (j, t);
emit_call_r_r (j, scm_vm_intrinsics.expand_stack, THREAD, SP);
emit_reload_sp (j);
emit_reload_fp (j);
restore_reloadable_register_state (j, saved_state);
k = jit_jmpi ();
/* Past sp_min_since_gc, but within stack_limit: update watermark and