vm: de-inline opcode dispatch.

The vm_execute function is heavily inlined by gcc, and
requires almost 500 bytes of stack space. The stack space
really adds up when the vm re-enters itself recursively.
Also, pointers to garbage can hide in areas of that bloated
stack frame that are not being used by execution paths,
adding to the spurious retention problem.

* lib.h (NOINLINE): New preprocessor symbol.

* vm.c (vm_prof, vm_frame, vm_sframe, vm_dframe, vm_end,
vm_fin, vm_call, vm_apply, vm_gcall, vm_gapply, vm_movrs,
vm_movsr, vm_movrr, vm_movrsi, vm_movsmi, vm_movrbi, vm_if,
vm_ifq, vm_ifql, vm_swtch, vm_uwprot, vm_block,
vm_no_block_err, vm_retsr, vm_retrs, vm_retrr, vm_abscsr,
vm_catch, vm_handle, vm_getsym, vm_getbind, vm_setsym,
vm_bindv, vm_close, vm_execute): Apply INLINE to functions.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index b485caed..4866893d 100644
--- a/lib.h
+++ b/lib.h
@@ -53,8 +53,10 @@ typedef uint_ptr_t ucnum;
 
 #ifdef __GNUC__
 #define noreturn __attribute__((noreturn))
+#define NOINLINE __attribute__((noinline))
 #else
 #define noreturn
+#define NOINLINE
 #endif
 
 typedef enum type {