From 001b1cbb0dacf76dd09cda56840c30226abd3534 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 26 Nov 2008 09:35:26 -0700
Subject: mesa: add missing type check for function calls

---
 src/mesa/shader/slang/slang_codegen.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 8d2655ec51..8abb642a72 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -2028,6 +2028,21 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name,
       return NULL;
    }
 
+   /* type checking to be sure function's return type matches 'dest' type */
+   if (dest) {
+      slang_typeinfo t0;
+
+      slang_typeinfo_construct(&t0);
+      _slang_typeof_operation(A, dest, &t0);
+
+      if (!slang_type_specifier_equal(&t0.spec, &fun->header.type.specifier)) {
+         slang_info_log_error(A->log,
+                              "Incompatible type returned by call to '%s'",
+                              name);
+         return NULL;
+      }
+   }
+
    n = _slang_gen_function_call(A, fun, oper, dest);
 
    if (n && !n->Store && !dest
-- 
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