nir/tex_instr: Add a nir_tex_src struct and dynamically allocate the src array

This solves a number of problems.  First is the ability to change the
number of sources that a texture instruction has.  Second, it solves the
delema that may occur if a texture instruction has more than 4 sources.

Reviewed-by: Connor Abbott <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c
index ad86a6ea945..da9b7a1d3b6 100644
--- a/src/glsl/nir/nir.c
+++ b/src/glsl/nir/nir.c
@@ -447,8 +447,9 @@ nir_tex_instr_create(void *mem_ctx, unsigned num_srcs)
    dest_init(&instr->dest);
 
    instr->num_srcs = num_srcs;
-   for (unsigned i = 0; i < 4; i++)
-      src_init(&instr->src[i]);
+   instr->src = ralloc_array(mem_ctx, nir_tex_src, num_srcs);
+   for (unsigned i = 0; i < num_srcs; i++)
+      src_init(&instr->src[i].src);
 
    instr->sampler_index = 0;
    instr->sampler_array_size = 0;