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tcg: Use tcg_malloc to allocate TCGLabelQemuLdst

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Pre-allocating 640 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 2014-09-30 07:18:06 -07:00
parent 7ccfb495c6
commit 686461c962
1 changed files with 12 additions and 14 deletions
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26
tcg/tcg-be-ldst.h
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@ -21,7 +21,6 @@
*/ */
#ifdef CONFIG_SOFTMMU #ifdef CONFIG_SOFTMMU
#define TCG_MAX_QEMU_LDST 640
typedef struct TCGLabelQemuLdst { typedef struct TCGLabelQemuLdst {
bool is_ld; /* qemu_ld: true, qemu_st: false */ bool is_ld; /* qemu_ld: true, qemu_st: false */
@ -34,11 +33,11 @@ typedef struct TCGLabelQemuLdst {
int mem_index; /* soft MMU memory index */ int mem_index; /* soft MMU memory index */
tcg_insn_unit *raddr; /* gen code addr of the next IR of qemu_ld/st IR */ tcg_insn_unit *raddr; /* gen code addr of the next IR of qemu_ld/st IR */
tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */ tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */
struct TCGLabelQemuLdst *next;
} TCGLabelQemuLdst; } TCGLabelQemuLdst;
typedef struct TCGBackendData { typedef struct TCGBackendData {
int nb_ldst_labels; TCGLabelQemuLdst *labels;
TCGLabelQemuLdst ldst_labels[TCG_MAX_QEMU_LDST];
} TCGBackendData; } TCGBackendData;
@ -48,7 +47,7 @@ typedef struct TCGBackendData {
static inline void tcg_out_tb_init(TCGContext *s) static inline void tcg_out_tb_init(TCGContext *s)
{ {
s->be->nb_ldst_labels = 0; s->be->labels = NULL;
} }
/* /*
@ -60,15 +59,14 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
static void tcg_out_tb_finalize(TCGContext *s) static void tcg_out_tb_finalize(TCGContext *s)
{ {
TCGLabelQemuLdst *lb = s->be->ldst_labels; TCGLabelQemuLdst *lb;
int i, n = s->be->nb_ldst_labels;
/* qemu_ld/st slow paths */ /* qemu_ld/st slow paths */
for (i = 0; i < n; i++) { for (lb = s->be->labels; lb != NULL; lb = lb->next) {
if (lb[i].is_ld) { if (lb->is_ld) {
tcg_out_qemu_ld_slow_path(s, lb + i); tcg_out_qemu_ld_slow_path(s, lb);
} else { } else {
tcg_out_qemu_st_slow_path(s, lb + i); tcg_out_qemu_st_slow_path(s, lb);
} }
} }
} }
@ -80,11 +78,11 @@ static void tcg_out_tb_finalize(TCGContext *s)
static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s) static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s)
{ {
TCGBackendData *be = s->be; TCGBackendData *be = s->be;
int n = be->nb_ldst_labels; TCGLabelQemuLdst *l = tcg_malloc(sizeof(*l));
assert(n < TCG_MAX_QEMU_LDST); l->next = be->labels;
be->nb_ldst_labels = n + 1; be->labels = l;
return &be->ldst_labels[n]; return l;
} }
#else #else
#include "tcg-be-null.h" #include "tcg-be-null.h"