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tcg: Use tcg_malloc to allocate TCGLabel 

Pre-allocating 512 of them per TB is a waste.

Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-02-13 18:51:05 -08:00
parent bec1631100
commit 51e3972c41
2 changed files with 23 additions and 24 deletions
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31
tcg/tcg.c
View File

@ -246,15 +246,11 @@ static void tcg_out_label(TCGContext *s, TCGLabel *l, tcg_insn_unit *ptr)
TCGLabel *gen_new_label(void) TCGLabel *gen_new_label(void)
{ {
TCGContext *s = &tcg_ctx; TCGContext *s = &tcg_ctx;
int idx; TCGLabel *l = tcg_malloc(sizeof(TCGLabel));
TCGLabel *l;
if (s->nb_labels >= TCG_MAX_LABELS) *l = (TCGLabel){
tcg_abort(); .id = s->nb_labels++
idx = s->nb_labels++; };
l = &s->labels[idx];
l->has_value = 0;
l->u.first_reloc = NULL;
return l; return l;
} }
@ -1086,11 +1082,20 @@ void tcg_dump_ops(TCGContext *s)
i = 0; i = 0;
break; break;
} }
for (; i < nb_cargs; i++) { switch (c) {
if (k != 0) { case INDEX_op_set_label:
qemu_log(","); case INDEX_op_br:
} case INDEX_op_brcond_i32:
qemu_log("$0x%" TCG_PRIlx, args[k++]); case INDEX_op_brcond_i64:
case INDEX_op_brcond2_i32:
qemu_log("%s$L%d", k ? "," : "", arg_label(args[k])->id);
i++, k++;
break;
default:
break;
}
for (; i < nb_cargs; i++, k++) {
qemu_log("%s$0x%" TCG_PRIlx, k ? "," : "", args[k]);
} }
} }
qemu_log("\n"); qemu_log("\n");

16
tcg/tcg.h
View File

@ -167,7 +167,8 @@ typedef struct TCGRelocation {
} TCGRelocation; } TCGRelocation;
typedef struct TCGLabel { typedef struct TCGLabel {
int has_value; unsigned has_value : 1;
unsigned id : 31;
union { union {
uintptr_t value; uintptr_t value;
tcg_insn_unit *value_ptr; tcg_insn_unit *value_ptr;
@ -183,8 +184,6 @@ typedef struct TCGPool {
#define TCG_POOL_CHUNK_SIZE 32768 #define TCG_POOL_CHUNK_SIZE 32768
#define TCG_MAX_LABELS 512
#define TCG_MAX_TEMPS 512 #define TCG_MAX_TEMPS 512
/* when the size of the arguments of a called function is smaller than /* when the size of the arguments of a called function is smaller than
@ -556,8 +555,6 @@ struct TCGContext {
target_ulong gen_opc_pc[OPC_BUF_SIZE]; target_ulong gen_opc_pc[OPC_BUF_SIZE];
uint16_t gen_opc_icount[OPC_BUF_SIZE]; uint16_t gen_opc_icount[OPC_BUF_SIZE];
uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
TCGLabel labels[TCG_MAX_LABELS];
}; };
extern TCGContext tcg_ctx; extern TCGContext tcg_ctx;
@ -766,9 +763,7 @@ TCGLabel *gen_new_label(void);
static inline TCGArg label_arg(TCGLabel *l) static inline TCGArg label_arg(TCGLabel *l)
{ {
ptrdiff_t idx = l - tcg_ctx.labels; return (uintptr_t)l;
tcg_debug_assert(idx >= 0 && idx < tcg_ctx.nb_labels);
return idx;
} }
/** /**
@ -779,10 +774,9 @@ static inline TCGArg label_arg(TCGLabel *l)
* encoding of the TCG opcode stream. * encoding of the TCG opcode stream.
*/ */
static inline TCGLabel *arg_label(TCGArg idx) static inline TCGLabel *arg_label(TCGArg i)
{ {
tcg_debug_assert(idx < tcg_ctx.nb_labels); return (TCGLabel *)(uintptr_t)i;
return &tcg_ctx.labels[idx];
} }
/** /**