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agx: add another RA torture mode

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31532>
This commit is contained in:
Alyssa Rosenzweig 2024-09-26 12:47:30 -04:00 • committed by Marge Bot
parent 819bd2ea62
commit 71448e391a
1 changed files with 5 additions and 2 deletions
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7
src/asahi/compiler/agx_register_allocate.c
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@ -371,8 +371,11 @@ find_best_region_to_evict(struct ra_ctx *rctx, enum ra_class cls, unsigned size,
"register file size must be aligned to the maximum vector size");
assert(cls == RA_GPR);
/* Useful for testing RA */
bool invert = false;
unsigned best_base = ~0;
unsigned best_moves = ~0;
unsigned best_moves = invert ? 0 : ~0;
for (unsigned base = 0; base + size <= rctx->bound[cls]; base += size) {
/* The first k registers are preallocated and unevictable, so must be
@ -424,7 +427,7 @@ find_best_region_to_evict(struct ra_ctx *rctx, enum ra_class cls, unsigned size,
* (due to killed sources), since the recursive splitting algorithm
* requires at least one free register.
*/
if (any_free && moves < best_moves) {
if (any_free && ((moves < best_moves) ^ invert)) {
best_moves = moves;
best_base = base;
}