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nir/opt_shrink_vectors: fix re-using of components for vecN 

Cc: mesa-stable
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17276>
This commit is contained in:
Daniel Schürmann 2022-06-28 11:13:54 +02:00 committed by Marge Bot
parent c655387a02
commit 862f1eacb2
1 changed files with 4 additions and 2 deletions
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6
src/compiler/nir/nir_opt_shrink_vectors.c
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@ -120,10 +120,12 @@ opt_shrink_vector(nir_builder *b, nir_alu_instr *instr)
if (!((mask >> i) & 0x1))
continue;
nir_ssa_scalar scalar = nir_get_ssa_scalar(instr->src[i].src.ssa, instr->src[i].swizzle[0]);
/* Try reuse a component with the same value */
unsigned j;
for (j = 0; j < num_components; j++) {
if (nir_alu_srcs_equal(instr, instr, i, j)) {
if (scalar.def == srcs[j].def && scalar.comp == srcs[j].comp) {
reswizzle[i] = j;
break;
}
@ -131,7 +133,7 @@ opt_shrink_vector(nir_builder *b, nir_alu_instr *instr)
/* Otherwise, just append the value */
if (j == num_components) {
srcs[num_components] = nir_get_ssa_scalar(instr->src[i].src.ssa, instr->src[i].swizzle[0]);
srcs[num_components] = scalar;
reswizzle[i] = num_components++;
}
}