From: Brian Paul <brianp@vmware.com>
Date: Thu, 9 Jul 2009 13:58:50 +0000 (-0600)
Subject: glsl: do const parameter optimization for array element actual parameters
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c86b0766681f986951e53ea852858eb8d6ce9e32;p=mesa.git

glsl: do const parameter optimization for array element actual parameters

When a function parameter is const-qualified we can avoid making a copy
of the actual parameter (we basically do a search/replace when inlining).
This is now done for array element params too, resulting in better code
(fewer MOV instructions).

We should allow some other types of function arguments here but let's be
conservative for the moment.
---

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 24e99523869..2b7e781f984 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -1417,8 +1417,9 @@ slang_inline_function_call(slang_assemble_ctx * A, slang_function *fun,
       }
       else if (p->type.qualifier == SLANG_QUAL_CONST) {
 	 /* a constant input param */
-	 if (args[i].type == SLANG_OPER_IDENTIFIER ||
-	     args[i].type == SLANG_OPER_LITERAL_FLOAT) {
+         if (args[i].type == SLANG_OPER_IDENTIFIER ||
+             args[i].type == SLANG_OPER_LITERAL_FLOAT ||
+             args[i].type == SLANG_OPER_SUBSCRIPT) {
 	    /* replace all occurances of this parameter variable with the
 	     * actual argument variable or a literal.
 	     */