From: Nicolai Hähnle <nicolai.haehnle@amd.com>
Date: Fri, 13 May 2016 06:56:44 +0000 (-0500)
Subject: st_glsl_to_tgsi: don't read potentially uninitialized buffer variable
X-Git-Tag: upstream/17.1.0~8728
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=494e4b8976a48e37e3cb51338ad69e085ea5061a;p=platform%2Fupstream%2Fmesa.git

st_glsl_to_tgsi: don't read potentially uninitialized buffer variable

Found by -fsanitize=undefined. Note that this should be a harmless issue in
practice because the inst->op check always dominates anyway.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
---

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index b7eaa13..8c6fe79 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -3334,7 +3334,7 @@ glsl_to_tgsi_visitor::visit_ssbo_intrinsic(ir_call *ir)
       inst = (glsl_to_tgsi_instruction *)inst->get_prev();
       if (inst->op == TGSI_OPCODE_UADD)
          inst = (glsl_to_tgsi_instruction *)inst->get_prev();
-   } while (inst && inst->buffer.file == PROGRAM_UNDEFINED && inst->op == op);
+   } while (inst && inst->op == op && inst->buffer.file == PROGRAM_UNDEFINED);
 }
 
 void