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glsl: Emit mul instead of dot if only one component left.

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Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85683
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85691
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Matt Turner
2014-10-31 10:33:17 -07:00
parent 263eb7fa39
commit 336e76c143
1 changed files with 4 additions and 1 deletions
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5
src/glsl/opt_algebraic.cpp
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@@ -572,9 +572,12 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir)
if (count >= op_const[i]->type->vector_elements)
break;
ir_expression_operation op = count == 1 ?
ir_binop_mul : ir_binop_dot;
/* Swizzle both operands to remove the channels that were zero. */
return new(mem_ctx)
ir_expression(ir_binop_dot, glsl_type::float_type,
ir_expression(op, glsl_type::float_type,
new(mem_ctx) ir_swizzle(ir->operands[0],
components, count),
new(mem_ctx) ir_swizzle(ir->operands[1],