DrSocalkwe3n/luajit
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Turn loads from immutable upvalues into constants.

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This commit is contained in:
Mike Pall
2012-07-20 18:54:52 +02:00
parent 834ff6d36d
commit 3636a720a5
6 changed files with 72 additions and 24 deletions
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6
src/lj_obj.h
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@@ -321,6 +321,10 @@ typedef struct GCproto {
/* Top bits used for counting created closures. */
#define PROTO_CLCOUNT 0x20 /* Base of saturating 3 bit counter. */
#define PROTO_CLC_BITS 3
#define PROTO_CLC_POLY (3*PROTO_CLCOUNT) /* Polymorphic threshold. */
#define PROTO_UV_LOCAL 0x8000 /* Upvalue for local slot. */
#define PROTO_UV_IMMUTABLE 0x4000 /* Immutable upvalue. */
#define proto_kgc(pt, idx) \
check_exp((uintptr_t)(intptr_t)(idx) >= (uintptr_t)-(intptr_t)(pt)->sizekgc, \
@@ -342,7 +346,7 @@ typedef struct GCproto {
typedef struct GCupval {
GCHeader;
uint8_t closed; /* Set if closed (i.e. uv->v == &uv->u.value). */
uint8_t unused;
uint8_t immutable; /* Immutable value. */
union {
TValue tv; /* If closed: the value itself. */
struct { /* If open: double linked list, anchored at thread. */