From: Rob Clark <robclark@freedesktop.org>
Date: Wed, 18 May 2016 15:40:34 +0000 (-0400)
Subject: nir/validate: fix null deref coverity warning
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5245d845b6f77361f01a7f577e1471345df132de;p=mesa.git

nir/validate: fix null deref coverity warning

CID 1265536 (#1 of 2): Explicit null dereferenced (FORWARD_NULL)6.
var_deref_op: Dereferencing null pointer parent.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
---

diff --git a/src/compiler/nir/nir_validate.c b/src/compiler/nir/nir_validate.c
index 8ac55d5e5bc..35bb162ac7f 100644
--- a/src/compiler/nir/nir_validate.c
+++ b/src/compiler/nir/nir_validate.c
@@ -376,6 +376,7 @@ validate_deref_chain(nir_deref *deref, validate_state *state)
          break;
 
       case nir_deref_type_struct:
+         assume(parent); /* cannot happen: deref change starts w/ nir_deref_var */
          validate_assert(state, deref->type ==
                 glsl_get_struct_field(parent->type,
                                       nir_deref_as_struct(deref)->index));