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Add support for =, != to ir_constant_expresion.cpp

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This results in constant folding of one more expression in CorrectParse2.frag.
This commit is contained in:
Eric Anholt
2010-04-06 10:02:27 -07:00
parent 85171c2dd8
commit ec1949e804
1 changed files with 43 additions and 0 deletions
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43
ir_constant_expression.cpp
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@@ -318,6 +318,49 @@ ir_constant_visitor::visit(ir_expression *ir)
}
break;
case ir_binop_equal:
if (ir->operands[0]->type == ir->operands[1]->type) {
type = glsl_type::bool_type;
b[0] = true;
for (c = 0; c < ir->operands[0]->type->components(); c++) {
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = b[0] && op[0]->value.u[c] == op[1]->value.u[c];
break;
case GLSL_TYPE_INT:
b[0] = b[0] && op[0]->value.i[c] == op[1]->value.i[c];
break;
case GLSL_TYPE_FLOAT:
b[0] = b[0] && op[0]->value.f[c] == op[1]->value.f[c];
break;
default:
assert(0);
}
}
}
break;
case ir_binop_nequal:
if (ir->operands[0]->type == ir->operands[1]->type) {
type = glsl_type::bool_type;
b[0] = false;
for (c = 0; c < ir->operands[0]->type->components(); c++) {
switch (ir->operands[0]->type->base_type) {
case GLSL_TYPE_UINT:
b[0] = b[0] || op[0]->value.u[c] != op[1]->value.u[c];
break;
case GLSL_TYPE_INT:
b[0] = b[0] || op[0]->value.i[c] != op[1]->value.i[c];
break;
case GLSL_TYPE_FLOAT:
b[0] = b[0] || op[0]->value.f[c] != op[1]->value.f[c];
break;
default:
assert(0);
}
}
}
break;
default:
break;
}