freedreno/ir3: bit of cleanup

Add an array_insert() macro to simplify inserting into dynamically sized
arrays, add a comment, and remove unused prototype inherited from the
original freedreno.git/fdre-a3xx test code, etc.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

src/gallium/drivers/freedreno/ir3/ir3.c

@@ -588,21 +588,10 @@ static void insert_instr(struct ir3 *shader,
 	static uint32_t serialno = 0;
 	instr->serialno = ++serialno;
 #endif
-	if (shader->instrs_count == shader->instrs_sz) {
-		shader->instrs_sz = MAX2(2 * shader->instrs_sz, 16);
-		shader->instrs = realloc(shader->instrs,
-				shader->instrs_sz * sizeof(shader->instrs[0]));
-	}
-	shader->instrs[shader->instrs_count++] = instr;
+	array_insert(shader->instrs, instr);
 
-	if (is_input(instr)) {
-		if (shader->baryfs_count == shader->baryfs_sz) {
-			shader->baryfs_sz = MAX2(2 * shader->baryfs_sz, 16);
-			shader->baryfs = realloc(shader->baryfs,
-					shader->baryfs_sz * sizeof(shader->baryfs[0]));
-		}
-		shader->baryfs[shader->baryfs_count++] = instr;
-	}
+	if (is_input(instr))
+		array_insert(shader->baryfs, instr);
 }
 
 struct ir3_block * ir3_block_create(struct ir3 *shader,

src/gallium/drivers/freedreno/ir3/ir3.h

@@ -38,8 +38,6 @@ struct ir3;
 struct ir3_instruction;
 struct ir3_block;
 
-struct ir3 * fd_asm_parse(const char *src);
-
 struct ir3_info {
 	uint16_t sizedwords;
 	uint16_t instrs_count;   /* expanded to account for rpt's */
@@ -313,8 +311,16 @@ struct ir3_heap_chunk;
 struct ir3 {
 	unsigned instrs_count, instrs_sz;
 	struct ir3_instruction **instrs;
+
+	/* Track bary.f (and ldlv) instructions.. this is needed in
+	 * scheduling to ensure that all varying fetches happen before
+	 * any potential kill instructions.  The hw gets grumpy if all
+	 * threads in a group are killed before the last bary.f gets
+	 * a chance to signal end of input (ei).
+	 */
 	unsigned baryfs_count, baryfs_sz;
 	struct ir3_instruction **baryfs;
+
 	struct ir3_block *block;
 	unsigned heap_idx;
 	struct ir3_heap_chunk *chunk;
@@ -503,6 +509,13 @@ static inline bool reg_gpr(struct ir3_register *r)
 	return true;
 }
 
+#define array_insert(arr, val) do { \
+		if (arr ## _count == arr ## _sz) { \
+			arr ## _sz = MAX2(2 * arr ## _sz, 16); \
+			arr = realloc(arr, arr ## _sz * sizeof(arr[0])); \
+		} \
+		arr[arr ##_count++] = val; \
+	} while (0)
 
 /* iterator for an instructions's sources (reg), also returns src #: */
 #define foreach_src_n(__srcreg, __n, __instr) \

src/gallium/drivers/freedreno/ir3/ir3_sched.c

@@ -199,7 +199,8 @@ static unsigned delay_calc(struct ir3_sched_ctx *ctx,
 }
 
 /* A negative return value signals that an instruction has been newly
- * scheduled, return back up to the top of the stack (to block_sched())
+ * SCHEDULED (or DELAYED due to address or predicate register already
+ * in use), return back up to the top of the stack (to block_sched())
  */
 static int trysched(struct ir3_sched_ctx *ctx,
 		struct ir3_instruction *instr)
@@ -252,9 +253,10 @@ static int trysched(struct ir3_sched_ctx *ctx,
 		unsigned i;
 
 		for (i = 0; i < ir->baryfs_count; i++) {
-			if (ir->baryfs[i]->depth == DEPTH_UNUSED)
+			struct ir3_instruction *baryf = ir->baryfs[i];
+			if (baryf->depth == DEPTH_UNUSED)
 				continue;
-			delay = trysched(ctx, ir->baryfs[i]);
+			delay = trysched(ctx, baryf);
 			if (delay)
 				return delay;
 		}