From: Brian <brian@yutani.localnet.net>
Date: Thu, 8 Mar 2007 17:40:25 +0000 (-0700)
Subject: check for attempted writes to read-only vars
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bf86ddaa2018d58c894da27d7a7a7b5449d1338e;p=mesa.git

check for attempted writes to read-only vars
---

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 1c037d4304b..b1b4616f638 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -2007,6 +2007,12 @@ _slang_gen_assignment(slang_assemble_ctx * A, slang_operation *oper)
    else {
       slang_ir_node *n, *lhs, *rhs;
       lhs = _slang_gen_operation(A, &oper->children[0]);
+      if (lhs->Store->File != PROGRAM_OUTPUT &&
+          lhs->Store->File != PROGRAM_TEMPORARY) {
+         slang_info_log_error(A->log, "Assignment to read-only variable");
+         return NULL;
+      }
+
       rhs = _slang_gen_operation(A, &oper->children[1]);
       if (lhs && rhs) {
          /* convert lhs swizzle into writemask */