lima/ppir: fix lod bias src

ppir has some code that operates on all ppir_src variables, and for that
uses ppir_node_get_src.
lod bias support introduced a separate ppir_src that is inaccessible by
that function, causing it to be missed by the compiler in some routines.
Ultimately this caused, in some cases, a bug in const lowering:

  .../pp/lower.c:42: ppir_lower_const: Assertion `src != NULL' failed.

This fix moves the ppir_srcs in ppir_load_texture_node together so they
don't get missed.

Fixes: 721d82cf061 lima/ppir: add lod-bias support

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3185>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3185>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/gallium/drivers/lima/ir/pp/ppir.h b/src/gallium/drivers/lima/ir/pp/ppir.h
index 5895a696db8..6b550a3c9d1 100644
--- a/src/gallium/drivers/lima/ir/pp/ppir.h
+++ b/src/gallium/drivers/lima/ir/pp/ppir.h
@@ -270,12 +270,13 @@ typedef struct {
 typedef struct {
    ppir_node node;
    ppir_dest dest;
-   ppir_src src_coords; /* not to be used after lowering */
+   ppir_src src[2]; /* src[0] temporarily stores src_coords,
+                       not to be used after lowering */
+   int num_src;
    int sampler;
    int sampler_dim;
    bool lod_bias_en;
    bool explicit_lod;
-   ppir_src lod_bias;
 } ppir_load_texture_node;
 
 typedef struct {
@@ -475,6 +476,7 @@ static inline int ppir_node_get_src_num(ppir_node *node)
    case ppir_node_type_load:
       return ppir_node_to_load(node)->num_src;
    case ppir_node_type_load_texture:
+      return ppir_node_to_load_texture(node)->num_src;
    case ppir_node_type_store:
       return 1;
    default:
@@ -495,7 +497,7 @@ static inline ppir_src *ppir_node_get_src(ppir_node *node, int idx)
    case ppir_node_type_branch:
       return &ppir_node_to_branch(node)->src[idx];
    case ppir_node_type_load_texture:
-      return &ppir_node_to_load_texture(node)->src_coords;
+      return &ppir_node_to_load_texture(node)->src[idx];
    case ppir_node_type_load:
       return &ppir_node_to_load(node)->src;
    case ppir_node_type_store: