tgsi/scan: add writes_memory to flag presence of stores or atomics

Reviewed-by: Marek Olšák <[email protected]>

2 files changed, 9 insertions, 4 deletions

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 65bdab5b1cd..d32c3a14344 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -196,10 +196,13 @@ scan_instruction(struct tgsi_shader_info *info,
       if (is_memory_file(src->Register.File)) {
          is_mem_inst = true;
 
-         if (src->Register.File == TGSI_FILE_IMAGE &&
-             !src->Register.Indirect &&
-             tgsi_get_opcode_info(fullinst->Instruction.Opcode)->is_store)
-            info->images_writemask |= 1 << src->Register.Index;
+         if (tgsi_get_opcode_info(fullinst->Instruction.Opcode)->is_store) {
+            info->writes_memory = TRUE;
+
+            if (src->Register.File == TGSI_FILE_IMAGE &&
+                !src->Register.Indirect)
+               info->images_writemask |= 1 << src->Register.Index;
+         }
       }
    }
 
@@ -215,6 +218,7 @@ scan_instruction(struct tgsi_shader_info *info,
          assert(fullinst->Instruction.Opcode == TGSI_OPCODE_STORE);
 
          is_mem_inst = true;
+         info->writes_memory = TRUE;
 
          if (dst->Register.File == TGSI_FILE_IMAGE &&
              !dst->Register.Indirect)
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index d777f23749b..76d8925119e 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -111,6 +111,7 @@ struct tgsi_shader_info
    boolean writes_clipvertex;
    boolean writes_viewport_index;
    boolean writes_layer;
+   boolean writes_memory; /**< contains stores or atomics to buffers or images */
    boolean is_msaa_sampler[PIPE_MAX_SAMPLERS];
    boolean uses_doubles; /**< uses any of the double instructions */
    unsigned clipdist_writemask;