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-rw-r--r--src/glsl/opt_algebraic.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp
index 1e715817f76..953b03c2943 100644
--- a/src/glsl/opt_algebraic.cpp
+++ b/src/glsl/opt_algebraic.cpp
@@ -520,6 +520,10 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
if (is_vec_one(op_const[0]))
return op_const[0];
+ /* x^1 == x */
+ if (is_vec_one(op_const[1]))
+ return ir->operands[0];
+
/* pow(2,x) == exp2(x) */
if (is_vec_two(op_const[0]))
return expr(ir_unop_exp2, ir->operands[1]);