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glsl: Make sure not to dereference NULL

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In this bit of code point_five can be NULL if the expression is not a
constant. This fixes it to match the pattern of the rest of the chunk
of code so that it checks for NULLs.

Cc: Matt Turner <mattst88@gmail.com>
Cc: "10.6" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Neil Roberts 2015-07-04 22:40:59 +01:00
parent 18039078e0
commit 86a3557d7c
1 changed files with 1 additions and 1 deletions
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2
src/glsl/opt_algebraic.cpp
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@ -589,7 +589,7 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
continue;
ir_constant *point_five = add_expr->operands[1 - j]->as_constant();
if (!point_five->is_value(0.5, 0))
if (!point_five || !point_five->is_value(0.5, 0))
continue;
if (abs_expr->operands[0]->equals(sign_expr->operands[0])) {