From: Eric Anholt <eric@anholt.net>
Date: Tue, 6 Apr 2010 17:07:20 +0000 (-0700)
Subject: Fold constant expressions in if conditionals.
X-Git-Tag: mesa-7.9-rc1~1173^2~625^2~426
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3fff009af169313fa22996d93ad195cf12729763;p=platform%2Fupstream%2Fmesa.git

Fold constant expressions in if conditionals.

Fixes up 3 more expressions in CorrectParse2.frag.
---

diff --git a/ir_constant_folding.cpp b/ir_constant_folding.cpp
index 306f211..b9dee37 100644
--- a/ir_constant_folding.cpp
+++ b/ir_constant_folding.cpp
@@ -127,5 +127,9 @@ ir_constant_folding_visitor::visit(ir_return *ir)
 void
 ir_constant_folding_visitor::visit(ir_if *ir)
 {
-   (void) ir;
+   ir_constant *const_val = ir->condition->constant_expression_value();
+   if (const_val)
+      ir->condition = const_val;
+   else
+      ir->condition->accept(this);
 }