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nir/loop_analyze: skip if basis/limit/comparison is vector

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Replacement in try_eval_const_alu() doesn't work because the replacements
are always scalar. The callers also always give a scalar dest.

This is encountered when compiling a Redout shader under ASan.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
Fixes: bc170e895f ("nir/loop_analyze: Use try_eval_const_alu and induction variable basis info")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26225>
This commit is contained in:
Rhys Perry 2023-10-13 19:56:24 +01:00 • committed by Marge Bot
parent 0957b01a06
commit 7960588413
1 changed files with 4 additions and 0 deletions
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4
src/compiler/nir/nir_loop_analyze.c
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@ -1050,6 +1050,10 @@ calculate_iterations(nir_def *basis, nir_def *limit_basis,
induction_base_type);
}
if (cond.def->num_components != 1 || basis->num_components != 1 ||
limit_basis->num_components != 1)
return -1;
/* do-while loops can increment the starting value before the condition is
* checked. e.g.
*