prog_optimize: fix a warning that a variable may be uninitialized

diff --git a/src/mesa/program/prog_optimize.c b/src/mesa/program/prog_optimize.c
index 11debc485eb4c23ca8116011d19faab6f645ba6e..8a40fa69eca6ad5bb1ebf8d42cf494c3b7ef3fa4 100644 (file)
--- a/src/mesa/program/prog_optimize.c
+++ b/src/mesa/program/prog_optimize.c
@@ -1304,6 +1304,9 @@ _mesa_simplify_cmp(struct gl_program * program)
          assert(inst->DstReg.Index < REG_ALLOCATE_MAX_PROGRAM_TEMPS);
          prevWriteMask = tempWrites[inst->DstReg.Index];
          tempWrites[inst->DstReg.Index] |= inst->DstReg.WriteMask;
+      } else {
+         /* No other register type can be a destination register. */
+         continue;
       }
 
       /* For a CMP to be considered a conditional write, the destination