mesa: Fix NULL deref in optimizer when NumInstructions == 0.

Bug #24984.
2009-11-20 21:42:06 +01:00
parent 48deddaa6f
commit c4e8918cd2
1 changed files with 1 additions and 1 deletions
--- a/src/mesa/shader/prog_optimize.c
+++ b/src/mesa/shader/prog_optimize.c
@@ -443,7 +443,7 @@ _mesa_remove_extra_move_use(struct gl_program *prog)
    *    FOO tmpY, arg0, arg1;
    */

-   for (i = 0; i < prog->NumInstructions - 1; i++) {
+   for (i = 0; i + 1 < prog->NumInstructions; i++) {
      const struct prog_instruction *mov = prog->Instructions + i;

      if (mov->Opcode != OPCODE_MOV ||