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tcg: Remove tcg_check_temp_count, tcg_clear_temp_count

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Since all temps allocated by guest front-ends are now TEMP_TB,
and we don't recycle TEMP_TB, there's no point in requiring
that the front-ends free the temps at all.  Begin by dropping
the inner-most checks that all temps have been freed.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-02-24 16:15:18 -10:00
parent 3470867b3b
commit 2f2e911d0c
3 changed files with 8 additions and 72 deletions
Download patch file Download diff file Expand all files Collapse all files

54
tcg/tcg.c
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@ -1273,7 +1273,7 @@ TCGTemp *tcg_temp_new_internal(TCGType type, TCGTempKind kind)
ts->temp_allocated = 1;
tcg_debug_assert(ts->base_type == type);
tcg_debug_assert(ts->kind == kind);
goto done;
return ts;
}
} else {
tcg_debug_assert(kind == TEMP_TB);
@ -1317,11 +1317,6 @@ TCGTemp *tcg_temp_new_internal(TCGType type, TCGTempKind kind)
ts2->kind = kind;
}
}
done:
#if defined(CONFIG_DEBUG_TCG)
s->temps_in_use++;
#endif
return ts;
}
@ -1366,30 +1361,18 @@ void tcg_temp_free_internal(TCGTemp *ts)
switch (ts->kind) {
case TEMP_CONST:
/*
* In order to simplify users of tcg_constant_*,
* silently ignore free.
*/
return;
case TEMP_EBB:
case TEMP_TB:
/* Silently ignore free. */
break;
case TEMP_EBB:
tcg_debug_assert(ts->temp_allocated != 0);
ts->temp_allocated = 0;
set_bit(temp_idx(ts), s->free_temps[ts->base_type].l);
break;
default:
/* It never made sense to free TEMP_FIXED or TEMP_GLOBAL. */
g_assert_not_reached();
}
tcg_debug_assert(ts->temp_allocated != 0);
ts->temp_allocated = 0;
#if defined(CONFIG_DEBUG_TCG)
assert(s->temps_in_use > 0);
s->temps_in_use--;
#endif
if (ts->kind == TEMP_EBB) {
int idx = temp_idx(ts);
set_bit(idx, s->free_temps[ts->base_type].l);
}
}
TCGTemp *tcg_constant_internal(TCGType type, int64_t val)
@ -1477,27 +1460,6 @@ TCGv_i64 tcg_const_i64(int64_t val)
return t0;
}
#if defined(CONFIG_DEBUG_TCG)
void tcg_clear_temp_count(void)
{
TCGContext *s = tcg_ctx;
s->temps_in_use = 0;
}
int tcg_check_temp_count(void)
{
TCGContext *s = tcg_ctx;
if (s->temps_in_use) {
/* Clear the count so that we don't give another
* warning immediately next time around.
*/
s->temps_in_use = 0;
return 1;
}
return 0;
}
#endif
/* Return true if OP may appear in the opcode stream.
Test the runtime variable that controls each opcode. */
bool tcg_op_supported(TCGOpcode op)