radv/ac/llvm: trim texture return values

The intrinsic engine asserts in llvm due to this,
as we put a vec4 into a vec1, and the next instruction
isn't expecting it.

So trim the vector at the end before inserting it.

Reported-by: Christoph Haag <haagch+mesadev@frickel.club>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index b602c5e..c12c506 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -3520,7 +3520,8 @@ static void visit_tex(struct nir_to_llvm_context *ctx, nir_tex_instr *instr)
                LLVMValueRef z = LLVMBuildExtractElement(ctx->builder, result, two, "");
                z = LLVMBuildSDiv(ctx->builder, z, six, "");
                result = LLVMBuildInsertElement(ctx->builder, result, z, two, "");
-       }
+       } else if (instr->dest.ssa.num_components != 4)
+               result = trim_vector(ctx, result, instr->dest.ssa.num_components);
 
 write_result:
        if (result) {