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tcg: Add temp_global bit to TCGTemp
This avoids needing to test the index of a temp against nb_globals. Backports commit fa477d25470187030614288d35bc734edffa41ee from qemu
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@ -115,26 +115,27 @@ static TCGOpcode op_to_movi(TCGContext *s, TCGOpcode op)
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}
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}
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}
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}
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static TCGArg find_better_copy(TCGContext *s, TCGArg temp)
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static TCGArg find_better_copy(TCGContext *s, TCGArg arg)
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{
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{
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struct tcg_temp_info *temps = s->temps2;
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struct tcg_temp_info *temps = s->temps2;
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TCGTemp *ts = arg_temp(s, arg);
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TCGArg i;
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TCGArg i;
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/* If this is already a global, we can't do better. */
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/* If this is already a global, we can't do better. */
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if (temp < (unsigned int)s->nb_globals) {
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if (ts->temp_global) {
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return temp;
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return arg;
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}
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}
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/* Search for a global first. */
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/* Search for a global first. */
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for (i = temps[temp].next_copy ; i != temp ; i = temps[i].next_copy) {
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for (i = temps[arg].next_copy ; i != arg; i = temps[i].next_copy) {
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if (i < (unsigned int)s->nb_globals) {
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if (i < (unsigned int)s->nb_globals) {
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return i;
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return i;
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}
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}
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}
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}
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/* If it is a temp, search for a temp local. */
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/* If it is a temp, search for a temp local. */
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if (!arg_temp(s, temp)->temp_local) {
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if (!ts->temp_local) {
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for (i = temps[temp].next_copy ; i != temp ; i = temps[i].next_copy) {
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for (i = temps[arg].next_copy ; i != arg; i = temps[i].next_copy) {
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if (s->temps[i].temp_local) {
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if (s->temps[i].temp_local) {
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return i;
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return i;
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}
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}
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@ -142,7 +143,7 @@ static TCGArg find_better_copy(TCGContext *s, TCGArg temp)
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}
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}
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/* Failure to find a better representation, return the same temp. */
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/* Failure to find a better representation, return the same temp. */
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return temp;
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return arg;
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}
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}
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static bool temps_are_copies(TCGContext *s, TCGArg arg1, TCGArg arg2)
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static bool temps_are_copies(TCGContext *s, TCGArg arg1, TCGArg arg2)
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@ -485,9 +485,14 @@ static inline TCGTemp *tcg_temp_alloc(TCGContext *s)
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static inline TCGTemp *tcg_global_alloc(TCGContext *s)
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static inline TCGTemp *tcg_global_alloc(TCGContext *s)
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{
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{
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TCGTemp *ts;
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tcg_debug_assert(s->nb_globals == s->nb_temps);
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tcg_debug_assert(s->nb_globals == s->nb_temps);
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s->nb_globals++;
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s->nb_globals++;
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return tcg_temp_alloc(s);
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ts = tcg_temp_alloc(s);
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ts->temp_global = 1;
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return ts;
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}
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}
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static int tcg_global_reg_new_internal(TCGContext *s, TCGType type,
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static int tcg_global_reg_new_internal(TCGContext *s, TCGType type,
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@ -1180,7 +1185,7 @@ static char *tcg_get_arg_str_ptr(TCGContext *s, char *buf, int buf_size,
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{
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{
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int idx = temp_idx(s, ts);
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int idx = temp_idx(s, ts);
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if (idx < s->nb_globals) {
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if (ts->temp_global) {
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pstrcpy(buf, buf_size, ts->name);
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pstrcpy(buf, buf_size, ts->name);
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} else if (ts->temp_local) {
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} else if (ts->temp_local) {
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snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
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snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
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@ -2207,7 +2212,7 @@ static void temp_free_or_dead(TCGContext *s, TCGTemp *ts, int free_or_dead)
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}
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}
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ts->val_type = (free_or_dead < 0
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ts->val_type = (free_or_dead < 0
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|| ts->temp_local
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|| ts->temp_local
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|| temp_idx(s, ts) < s->nb_globals
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|| ts->temp_global
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? TEMP_VAL_MEM : TEMP_VAL_DEAD);
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? TEMP_VAL_MEM : TEMP_VAL_DEAD);
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}
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}
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@ -582,10 +582,14 @@ typedef struct TCGTemp {
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unsigned int indirect_base:1;
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unsigned int indirect_base:1;
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unsigned int mem_coherent:1;
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unsigned int mem_coherent:1;
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unsigned int mem_allocated:1;
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unsigned int mem_allocated:1;
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unsigned int temp_local:1; /* If true, the temp is saved across
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/* If true, the temp is saved across both basic blocks and
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basic blocks. Otherwise, it is not
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translation blocks. */
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preserved across basic blocks. */
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unsigned int temp_global:1;
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unsigned int temp_allocated:1; /* never used for code gen */
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/* If true, the temp is saved across basic blocks but dead
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at the end of translation blocks. If false, the temp is
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dead at the end of basic blocks. */
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unsigned int temp_local:1;
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unsigned int temp_allocated:1;
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tcg_target_long val;
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tcg_target_long val;
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intptr_t mem_offset;
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intptr_t mem_offset;
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