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pan/midgard: Don't try to OR live_in of successors

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By definition, once liveness analysis has occurred:

   live_out = OR {succ} succ->live_in

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-10-03 16:13:13 -04:00
parent 013cd6bed2
commit 846e5d5ba8
1 changed files with 2 additions and 6 deletions
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8
src/panfrost/midgard/midgard_ra.c
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@ -26,6 +26,7 @@
#include "midgard_ops.h"
#include "util/register_allocate.h"
#include "util/u_math.h"
#include "util/u_memory.h"
/* For work registers, we can subdivide in various ways. So we create
* classes for the various sizes and conflict accordingly, keeping in
@ -553,12 +554,7 @@ mir_compute_interference(
* end of each block and walk the block backwards. */
mir_foreach_block(ctx, blk) {
uint8_t *live = calloc(ctx->temp_count, 1);
mir_foreach_successor(blk, succ) {
for (unsigned i = 0; i < ctx->temp_count; ++i)
live[i] |= succ->live_in[i];
}
uint8_t *live = mem_dup(blk->live_out, ctx->temp_count * sizeof(uint8_t));
mir_foreach_instr_in_block_rev(blk, ins) {
/* Mark all registers live after the instruction as