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25 * @file vc4_opt_algebraic.c
27 * This is the optimization pass for miscellaneous changes to instructions
28 * where we can simplify the operation by some knowledge about the specific
31 * Mostly this will be a matter of turning things into MOVs so that they can
32 * later be copy-propagated out.
38 qir_opt_algebraic(struct vc4_compile
*c
)
40 bool progress
= false;
41 struct simple_node
*node
;
44 foreach(node
, &c
->instructions
) {
45 struct qinst
*inst
= (struct qinst
*)node
;
52 /* Turn "dst = (sf == x) ? a : a)" into "dst = a" */
53 if (qir_reg_equals(inst
->src
[0], inst
->src
[1])) {
55 fprintf(stderr
, "optimizing: ");
57 fprintf(stderr
, "\n");
61 inst
->src
[0] = inst
->src
[1];
62 inst
->src
[1] = c
->undef
;
66 fprintf(stderr
, "to: ");
68 fprintf(stderr
, "\n");