From ced54dcf9b496dbe0bf254673ecee37014c1ee3b Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Tue, 13 Mar 2012 11:42:26 -0700 Subject: [PATCH] glsl: Comment that expression flattening is used for matrix operations. Signed-off-by: Kenneth Graunke Reviewed-by: Eric Anholt --- src/glsl/ir_expression_flattening.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/glsl/ir_expression_flattening.cpp b/src/glsl/ir_expression_flattening.cpp index 0b7c537..bd4ac67 100644 --- a/src/glsl/ir_expression_flattening.cpp +++ b/src/glsl/ir_expression_flattening.cpp @@ -27,7 +27,10 @@ * Takes the leaves of expression trees and makes them dereferences of * assignments of the leaves to temporaries, according to a predicate. * - * This is used for automatic function inlining, where we want to take + * This is used for breaking down matrix operations, where it's easier to + * create a temporary and work on each of its vector components individually. + * + * It is also used for automatic function inlining, where we want to take * an expression containing a call and move the call out to its own * assignment so that we can inline it at the appropriate place in the * instruction stream. -- 2.7.4