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nir_lower_to_source_mods: Don't sneek in an abs modifier from parent

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If the abs source modifiers is not supported for the current
instruction because it is an instruction with three sources we
may still see a parent mov that has the `abs` modifier. In this
case we must not propagate that abs modifier from that parent
instructions.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7350

Fixes: cd73b6174b
    nir/lower_to_source_mods: Stop turning add, sat, and neg into mov

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18902>
This commit is contained in:
Gert Wollny
2022-09-30 15:27:13 +02:00
parent 8945375b80
commit 9ebe893a61
1 changed files with 2 additions and 1 deletions
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3
src/compiler/nir/nir_lower_to_source_mods.c
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@@ -106,7 +106,8 @@ nir_lower_to_source_mods_block(nir_block *block,
continue; continue;
if (!lower_abs && (parent->op == nir_op_fabs || if (!lower_abs && (parent->op == nir_op_fabs ||
parent->op == nir_op_iabs)) parent->op == nir_op_iabs ||
parent->src[0].abs))
continue; continue;
nir_instr_rewrite_src(instr, &alu->src[i].src, parent->src[0].src); nir_instr_rewrite_src(instr, &alu->src[i].src, parent->src[0].src);