2 #include "radeon_compiler.h"
3 #include "radeon_compiler_util.h"
4 #include "radeon_opcodes.h"
5 #include "radeon_program_pair.h"
7 static void mark_used_presub(struct rc_pair_sub_instruction * sub)
9 if (sub->Src[RC_PAIR_PRESUB_SRC].Used) {
10 unsigned int presub_reg_count = rc_presubtract_src_reg_count(
11 sub->Src[RC_PAIR_PRESUB_SRC].Index);
13 for (i = 0; i < presub_reg_count; i++) {
19 static void mark_used(
20 struct rc_instruction * inst,
21 struct rc_pair_sub_instruction * sub)
24 const struct rc_opcode_info * info = rc_get_opcode_info(sub->Opcode);
25 for (i = 0; i < info->NumSrcRegs; i++) {
26 unsigned int src_type = rc_source_type_swz(sub->Arg[i].Swizzle);
27 if (src_type & RC_SOURCE_RGB) {
28 inst->U.P.RGB.Src[sub->Arg[i].Source].Used = 1;
31 if (src_type & RC_SOURCE_ALPHA) {
32 inst->U.P.Alpha.Src[sub->Arg[i].Source].Used = 1;
38 * This pass finds sources that are not used by their instruction and marks
41 void rc_pair_remove_dead_sources(struct radeon_compiler * c, void *user)
43 struct rc_instruction * inst;
44 for (inst = c->Program.Instructions.Next;
45 inst != &c->Program.Instructions;
48 if (inst->Type == RC_INSTRUCTION_NORMAL)
51 /* Mark all sources as unused */
52 for (i = 0; i < 4; i++) {
53 inst->U.P.RGB.Src[i].Used = 0;
54 inst->U.P.Alpha.Src[i].Used = 0;
56 mark_used(inst, &inst->U.P.RGB);
57 mark_used(inst, &inst->U.P.Alpha);
59 mark_used_presub(&inst->U.P.RGB);
60 mark_used_presub(&inst->U.P.Alpha);