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Fix issue #118

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This commit is contained in:
danghvu 2015-09-21 20:30:05 -05:00
parent f9dc4dcede
commit 0c67f41ed9
1 changed files with 3 additions and 5 deletions
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8
qemu/tcg/tcg.c
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@ -1431,7 +1431,6 @@ static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps,
memset(mem_temps + s->nb_globals, 0, s->nb_temps - s->nb_globals);
}
#if 0
/* liveness analysis: end of basic block: all temps are dead, globals
and local temps should be in memory. */
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps,
@ -1445,7 +1444,6 @@ static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps,
mem_temps[i] = s->temps[i].temp_local;
}
}
#endif
/* Liveness analysis : update the opc_dead_args array to tell if a
given input arguments is dead. Instructions updating dead
@ -1684,12 +1682,12 @@ static void tcg_liveness_analysis(TCGContext *s)
}
/* if end of basic block, update */
if (def->flags & TCG_OPF_BB_END) {
// Unicorn: do not optimize dead temps.
if (def->flags & TCG_OPF_BB_END && op != INDEX_op_brcond_i32) {
// Unicorn: do not optimize dead temps on brcond,
// this causes problem because check_exit_request() inserts
// brcond instruction in the middle of the TB,
// which incorrectly flags end-of-block
// tcg_la_bb_end(s, dead_temps, mem_temps);
tcg_la_bb_end(s, dead_temps, mem_temps);
} else if (def->flags & TCG_OPF_SIDE_EFFECTS) {
/* globals should be synced to memory */
memset(mem_temps, 1, s->nb_globals);