On November 2, 2018 08:20:34 Timothy Arceri <tarc...@itsqueeze.com> wrote:
On 2/11/18 11:52 pm, Jason Ekstrand wrote:
On November 2, 2018 06:25:59 Timothy Arceri <tarc...@itsqueeze.com> wrote:
We cannot use nir_build_alu() to create the new alu as it has no
way to know how many components of the src we will use. This
results in it guessing the max number of components from one of
its inputs.
Fixes the following CTS tests:
dEQP-VK.spirv_assembly.instruction.graphics.selection_block_order.out_of_order_frag
dEQP-VK.spirv_assembly.instruction.graphics.selection_block_order.out_of_order_geom
dEQP-VK.spirv_assembly.instruction.graphics.selection_block_order.out_of_order_tessc
dEQP-VK.spirv_assembly.instruction.graphics.selection_block_order.out_of_order_vert
Fixes: 2975422ceb6c ("nir: propagates if condition evaluation down
some alu chains")
---
I'm running this in Intel CI currently but it hasn't been giving me
proper results
today so fingers crossed.
src/compiler/nir/nir_opt_if.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/src/compiler/nir/nir_opt_if.c
b/src/compiler/nir/nir_opt_if.c
index ed93cac9ce9..1eb49a64aba 100644
--- a/src/compiler/nir/nir_opt_if.c
+++ b/src/compiler/nir/nir_opt_if.c
@@ -391,6 +391,34 @@ evaluate_if_condition(nir_if *nif, nir_cursor
cursor, bool *value)
}
}
+static nir_ssa_def *
+clone_alu_and_replace_src_defs(nir_builder *b, const nir_alu_instr *alu,
+ nir_ssa_def **src_defs)
+{
+ nir_alu_instr *nalu = nir_alu_instr_create(b->shader, alu->op);
+ nalu->exact = alu->exact;
+
+ nir_ssa_dest_init(&nalu->instr, &nalu->dest.dest,
+ alu->dest.dest.ssa.num_components,
+ alu->dest.dest.ssa.bit_size,
alu->dest.dest.ssa.name);
+
+ nalu->dest.saturate = alu->dest.saturate;
+ nalu->dest.write_mask = alu->dest.write_mask;
Somewhere, we should copy over alu->exact
Yeah its at the very top :)
Drp...
+
+ for (unsigned i = 0; i < nir_op_infos[alu->op].num_inputs; i++) {
+ nalu->src[i].src.is_ssa = alu->src[i].src.is_ssa;
I think it would be better to assert here
+ nalu->src[i].src.ssa = src_defs[i];
And use src_for_ssa here
Yeah makes sense will change.
Cool. Rb then.
+ nalu->src[i].negate = alu->src[i].negate;
+ nalu->src[i].abs = alu->src[i].abs;
+ memcpy(nalu->src[i].swizzle, alu->src[i].swizzle,
+ sizeof(nalu->src[i].swizzle));
+ }
+
+ nir_builder_instr_insert(b, &nalu->instr);
+
+ return &nalu->dest.dest.ssa;;
+}
+
/*
* This propagates if condition evaluation down the chain of some alu
* instructions. For example by checking the use of some of the
following alu
@@ -456,7 +484,8 @@ propagate_condition_eval(nir_builder *b, nir_if
*nif, nir_src *use_src,
def[i] = alu->src[i].src.ssa;
}
}
- nir_ssa_def *nalu = nir_build_alu(b, alu->op, def[0], def[1],
def[2], def[3]);
+
+ nir_ssa_def *nalu = clone_alu_and_replace_src_defs(b, alu, def);
/* Rewrite use to use new alu instruction */
nir_src new_src = nir_src_for_ssa(nalu);
--
2.19.1
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