r300/compiler: Add more info to struct rc_reader

For pair instructions we need a reference to both the arg
and source.

src/mesa/drivers/dri/r300/compiler/radeon_dataflow.c

@@ -495,12 +495,11 @@ struct get_readers_callback_data {
 	struct branch_write_mask BranchMasks[R500_PFS_MAX_BRANCH_DEPTH_FULL + 1];
 };
 
-static void add_reader(
+static struct rc_reader * add_reader(
 	struct memory_pool * pool,
 	struct rc_reader_data * data,
 	struct rc_instruction * inst,
-	unsigned int mask,
-	void * arg_or_src)
+	unsigned int mask)
 {
 	struct rc_reader * new;
 	memory_pool_array_reserve(pool, struct rc_reader, data->Readers,
@@ -508,11 +507,32 @@ static void add_reader(
 	new = &data->Readers[data->ReaderCount++];
 	new->Inst = inst;
 	new->WriteMask = mask;
-	if (inst->Type == RC_INSTRUCTION_NORMAL) {
-		new->U.Src = arg_or_src;
-	} else {
-		new->U.Arg = arg_or_src;
-	}
+	return new;
+}
+
+static void add_reader_normal(
+	struct memory_pool * pool,
+	struct rc_reader_data * data,
+	struct rc_instruction * inst,
+	unsigned int mask,
+	struct rc_src_register * src)
+{
+	struct rc_reader * new = add_reader(pool, data, inst, mask);
+	new->U.I.Src = src;
+}
+
+
+static void add_reader_pair(
+	struct memory_pool * pool,
+	struct rc_reader_data * data,
+	struct rc_instruction * inst,
+	unsigned int mask,
+	struct rc_pair_instruction_arg * arg,
+	struct rc_pair_instruction_source * src)
+{
+	struct rc_reader * new = add_reader(pool, data, inst, mask);
+	new->U.P.Src = src;
+	new->U.P.Arg = arg;
 }
 
 static unsigned int get_readers_read_callback(
@@ -575,7 +595,7 @@ static void get_readers_pair_read_callback(
 	if (d->ReaderData->Abort)
 		return;
 
-	add_reader(&d->C->Pool, d->ReaderData, inst, shared_mask, arg);
+	add_reader_pair(&d->C->Pool, d->ReaderData, inst, shared_mask, arg, src);
 }
 
 /**
@@ -603,7 +623,7 @@ static void get_readers_normal_read_callback(
 	if (d->ReaderData->Abort)
 		return;
 
-	add_reader(&d->C->Pool, d->ReaderData, inst, shared_mask, src);
+	add_reader_normal(&d->C->Pool, d->ReaderData, inst, shared_mask, src);
 }
 
 /**

src/mesa/drivers/dri/r300/compiler/radeon_dataflow.h

@@ -74,8 +74,13 @@ struct rc_reader {
 	struct rc_instruction * Inst;
 	unsigned int WriteMask;
 	union {
-		struct rc_src_register * Src;
-		struct rc_pair_instruction_arg * Arg;
+		struct {
+			struct rc_src_register * Src;
+		} I;
+		struct {
+			struct rc_pair_instruction_arg * Arg;
+			struct rc_pair_instruction_source * Src;
+		} P;
 	} U;
 };
 

src/mesa/drivers/dri/r300/compiler/radeon_optimize.c

@@ -154,7 +154,7 @@ static void copy_propagate(struct radeon_compiler * c, struct rc_instruction * i
 	/* Propagate the MOV instruction. */
 	for (i = 0; i < reader_data.ReaderCount; i++) {
 		struct rc_instruction * inst = reader_data.Readers[i].Inst;
-		*reader_data.Readers[i].U.Src = chain_srcregs(*reader_data.Readers[i].U.Src, inst_mov->U.I.SrcReg[0]);
+		*reader_data.Readers[i].U.I.Src = chain_srcregs(*reader_data.Readers[i].U.I.Src, inst_mov->U.I.SrcReg[0]);
 
 		if (inst_mov->U.I.SrcReg[0].File == RC_FILE_PRESUB)
 			inst->U.I.PreSub = inst_mov->U.I.PreSub;
@@ -466,7 +466,7 @@ static int presub_helper(
 				rc_get_opcode_info(reader.Inst->U.I.Opcode);
 
 		for (src_index = 0; src_index < info->NumSrcRegs; src_index++) {
-			if (&reader.Inst->U.I.SrcReg[src_index] == reader.U.Src)
+			if (&reader.Inst->U.I.SrcReg[src_index] == reader.U.I.Src)
 				presub_replace(inst_add, reader.Inst, src_index);
 		}
 	}

src/mesa/drivers/dri/r300/compiler/radeon_pair_schedule.c

@@ -739,7 +739,7 @@ static int convert_rgb_to_alpha(
 
 	for(i = 0; i < sched_inst->GlobalReaders.ReaderCount; i++) {
 		struct rc_reader reader = sched_inst->GlobalReaders.Readers[i];
-		rgb_to_alpha_remap(reader.Inst, reader.U.Arg,
+		rgb_to_alpha_remap(reader.Inst, reader.U.P.Arg,
 					RC_FILE_TEMPORARY, old_swz, new_index);
 	}
 	return 1;

src/mesa/drivers/dri/r300/compiler/radeon_rename_regs.c

@@ -85,7 +85,7 @@ void rc_rename_regs(struct radeon_compiler *c, void *user)
 
 		reader_data.Writer->U.I.DstReg.Index = new_index;
 		for(i = 0; i < reader_data.ReaderCount; i++) {
-			reader_data.Readers[i].U.Src->Index = new_index;
+			reader_data.Readers[i].U.I.Src->Index = new_index;
 		}
 	}
 }