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-rw-r--r--src/glsl/opt_algebraic.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp
index 778638cf261..5c49a785ccd 100644
--- a/src/glsl/opt_algebraic.cpp
+++ b/src/glsl/opt_algebraic.cpp
@@ -571,7 +571,9 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
} else if (is_vec_zero(op_const[0])) {
return mul(ir->operands[1], ir->operands[2]);
} else if (is_vec_zero(op_const[1])) {
- return add(ir->operands[0], neg(mul(ir->operands[0], ir->operands[2])));
+ unsigned op2_components = ir->operands[2]->type->vector_elements;
+ ir_constant *one = new(mem_ctx) ir_constant(1.0f, op2_components);
+ return mul(ir->operands[0], add(one, neg(ir->operands[2])));
}
break;