radv/ac/llvm: shadow samplers only return one value.

The intrinsic engine asserts in llvm due to this.

Reported-by: Christoph Haag <haagch+mesadev@frickel.club>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit b56b54cbf1d8e70c87a434da5350d11533e5fed8)

Squashed with commit:

radv/ac/llvm: fix regression with shadow samplers fix

This fixes b56b54cbf1d8e70c87a434da5350d11533e5fed8:
radv/ac/llvm: shadow samplers only return one value

It makes sure we only do that for shadow sampling, as
opposed to sizing requests.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit b2e217369e1ca4bf9d7741721559a4506b1f0ce8)

Squashed with commit:

radv: brown-paper bag for a forgotten else.

This fixes the fix:
radv/ac/llvm: fix regression with shadow samplers fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 020978af12ef6d598bc5efeae3704c0eb8cdafd2)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 799eb34..0daef08 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -3545,6 +3545,8 @@ static void visit_tex(struct nir_to_llvm_context *ctx, nir_tex_instr *instr)
 
        if (instr->op == nir_texop_query_levels)
                result = LLVMBuildExtractElement(ctx->builder, result, LLVMConstInt(ctx->i32, 3, false), "");
+       else if (instr->is_shadow && instr->op != nir_texop_txs && instr->op != nir_texop_lod)
+               result = LLVMBuildExtractElement(ctx->builder, result, ctx->i32zero, "");
        else if (instr->op == nir_texop_txs &&
                 instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE &&
                 instr->is_array) {