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tcg: Allocate objects contiguously in temp_allocate_frame

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When allocating a temp to the stack frame, consider the
base type and allocate all parts at once.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-10-19 12:03:40 +10:00
parent 466d375960
commit 273eb50c0f
1 changed files with 26 additions and 8 deletions
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30
tcg/tcg.c
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@ -3267,11 +3267,12 @@ static bool liveness_pass_2(TCGContext *s)
static void temp_allocate_frame(TCGContext *s, TCGTemp *ts)
{
int size = tcg_type_size(ts->type);
int align;
intptr_t off;
int size, align;
switch (ts->type) {
/* When allocating an object, look at the full type. */
size = tcg_type_size(ts->base_type);
switch (ts->base_type) {
case TCG_TYPE_I32:
align = 4;
break;
@ -3302,13 +3303,30 @@ static void temp_allocate_frame(TCGContext *s, TCGTemp *ts)
tcg_raise_tb_overflow(s);
}
s->current_frame_offset = off + size;
ts->mem_offset = off;
#if defined(__sparc__)
ts->mem_offset += TCG_TARGET_STACK_BIAS;
off += TCG_TARGET_STACK_BIAS;
#endif
/* If the object was subdivided, assign memory to all the parts. */
if (ts->base_type != ts->type) {
int part_size = tcg_type_size(ts->type);
int part_count = size / part_size;
/*
* Each part is allocated sequentially in tcg_temp_new_internal.
* Jump back to the first part by subtracting the current index.
*/
ts -= ts->temp_subindex;
for (int i = 0; i < part_count; ++i) {
ts[i].mem_offset = off + i * part_size;
ts[i].mem_base = s->frame_temp;
ts[i].mem_allocated = 1;
}
} else {
ts->mem_offset = off;
ts->mem_base = s->frame_temp;
ts->mem_allocated = 1;
}
}
/* Assign @reg to @ts, and update reg_to_temp[]. */