glsl2: Add optimization pass for algebraic simplifications.

This cleans up the assembly output of almost all the non-logic tests
glsl-algebraic-*.  glsl-algebraic-pow-two needs love (basically,
flattening to a temporary and squaring it).

1 files changed, 8 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index e0f3683a7a..7e8363106d 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -613,7 +613,15 @@ enum ir_expression_operation {
    ir_binop_greater,
    ir_binop_lequal,
    ir_binop_gequal,
+   /**
+    * Returns single boolean for whether all components of operands[0]
+    * equal the components of operands[1].
+    */
    ir_binop_equal,
+   /**
+    * Returns single boolean for whether any component of operands[0]
+    * is not equal to the corresponding component of operands[1].
+    */
    ir_binop_nequal,
    /*@}*/