From c00a67171c99a885ffa46aff31f9cfa165947d78 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Thu, 24 Oct 2019 12:05:56 -0700
Subject: freedreno/ir3: add input/output iterators

We can at least get rid of the if-not-NULL check in a bunch of places.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
---
 src/freedreno/ir3/ir3.h              | 13 +++++++++++++
 src/freedreno/ir3/ir3_a6xx.c         | 10 ++++------
 src/freedreno/ir3/ir3_compiler_nir.c |  9 ++-------
 src/freedreno/ir3/ir3_cp.c           |  9 ++++-----
 src/freedreno/ir3/ir3_depth.c        | 15 +++++++--------
 src/freedreno/ir3/ir3_group.c        |  9 +++------
 src/freedreno/ir3/ir3_print.c        |  7 +++----
 src/freedreno/ir3/ir3_ra.c           |  8 +++-----
 src/freedreno/ir3/ir3_sched.c        |  9 ++-------
 src/freedreno/ir3/ir3_shader.c       | 17 +++++------------
 src/freedreno/ir3/ir3_sun.c          |  6 +++---
 11 files changed, 49 insertions(+), 63 deletions(-)

(limited to 'src')

diff --git a/src/freedreno/ir3/ir3.h b/src/freedreno/ir3/ir3.h
index 22802aecf18..3e4fa34aa0f 100644
--- a/src/freedreno/ir3/ir3.h
+++ b/src/freedreno/ir3/ir3.h
@@ -1063,6 +1063,19 @@ static inline bool __is_false_dep(struct ir3_instruction *instr, unsigned n)
 #define foreach_ssa_src(__srcinst, __instr) \
 	foreach_ssa_src_n(__srcinst, __i, __instr)
 
+/* iterators for shader inputs: */
+#define foreach_input_n(__ininstr, __cnt, __ir) \
+	for (unsigned __cnt = 0; __cnt < (__ir)->ninputs; __cnt++) \
+		if ((__ininstr = (__ir)->inputs[__cnt]))
+#define foreach_input(__ininstr, __ir) \
+	foreach_input_n(__ininstr, __i, __ir)
+
+/* iterators for shader outputs: */
+#define foreach_output_n(__outinstr, __cnt, __ir) \
+	for (unsigned __cnt = 0; __cnt < (__ir)->noutputs; __cnt++) \
+		if ((__outinstr = (__ir)->outputs[__cnt]))
+#define foreach_output(__outinstr, __ir) \
+	foreach_output_n(__outinstr, __i, __ir)
 
 /* dump: */
 void ir3_print(struct ir3 *ir);
diff --git a/src/freedreno/ir3/ir3_a6xx.c b/src/freedreno/ir3/ir3_a6xx.c
index 4b2ecc00827..457b20d0071 100644
--- a/src/freedreno/ir3/ir3_a6xx.c
+++ b/src/freedreno/ir3/ir3_a6xx.c
@@ -408,12 +408,10 @@ ir3_a6xx_fixup_atomic_dests(struct ir3 *ir, struct ir3_shader_variant *so)
 		}
 
 		/* we also need to fixup shader outputs: */
-		for (unsigned i = 0; i < ir->noutputs; i++) {
-			if (!ir->outputs[i])
-				continue;
-			if (is_atomic(ir->outputs[i]->opc) && (ir->outputs[i]->flags & IR3_INSTR_G))
-				ir->outputs[i] = get_atomic_dest_mov(ir->outputs[i]);
-		}
+		struct ir3_instruction *out;
+		foreach_output_n(out, n, ir)
+			if (is_atomic(out->opc) && (out->flags & IR3_INSTR_G))
+				ir->outputs[n] = get_atomic_dest_mov(out);
 	}
 
 }
diff --git a/src/freedreno/ir3/ir3_compiler_nir.c b/src/freedreno/ir3/ir3_compiler_nir.c
index daa073eb266..13566dd3773 100644
--- a/src/freedreno/ir3/ir3_compiler_nir.c
+++ b/src/freedreno/ir3/ir3_compiler_nir.c
@@ -3425,15 +3425,10 @@ ir3_compile_shader_nir(struct ir3_compiler *compiler,
 		ret = ir3_ra(so, precolor, ARRAY_SIZE(precolor));
 	} else if (so->num_sampler_prefetch) {
 		assert(so->type == MESA_SHADER_FRAGMENT);
-		struct ir3_instruction *precolor[2];
+		struct ir3_instruction *instr, *precolor[2];
 		int idx = 0;
 
-		for (unsigned i = 0; i < ir->ninputs; i++) {
-			struct ir3_instruction *instr = ctx->ir->inputs[i];
-
-			if (!instr)
-				continue;
-
+		foreach_input(instr, ir) {
 			if (instr->input.sysval != SYSTEM_VALUE_BARYCENTRIC_PIXEL)
 				continue;
 
diff --git a/src/freedreno/ir3/ir3_cp.c b/src/freedreno/ir3/ir3_cp.c
index d07418419cd..f8298d60752 100644
--- a/src/freedreno/ir3/ir3_cp.c
+++ b/src/freedreno/ir3/ir3_cp.c
@@ -759,11 +759,10 @@ ir3_cp(struct ir3 *ir, struct ir3_shader_variant *so)
 
 	ir3_clear_mark(ir);
 
-	for (unsigned i = 0; i < ir->noutputs; i++) {
-		if (ir->outputs[i]) {
-			instr_cp(&ctx, ir->outputs[i]);
-			ir->outputs[i] = eliminate_output_mov(ir->outputs[i]);
-		}
+	struct ir3_instruction *out;
+	foreach_output_n(out, n, ir) {
+		instr_cp(&ctx, out);
+		ir->outputs[n] = eliminate_output_mov(out);
 	}
 
 	list_for_each_entry (struct ir3_block, block, &ir->block_list, node) {
diff --git a/src/freedreno/ir3/ir3_depth.c b/src/freedreno/ir3/ir3_depth.c
index 601ab427fb1..bdd00693104 100644
--- a/src/freedreno/ir3/ir3_depth.c
+++ b/src/freedreno/ir3/ir3_depth.c
@@ -233,9 +233,9 @@ compute_depth_and_remove_unused(struct ir3 *ir, struct ir3_shader_variant *so)
 		}
 	}
 
-	for (i = 0; i < ir->noutputs; i++)
-		if (ir->outputs[i])
-			ir3_instr_depth(ir->outputs[i], 0, false);
+	struct ir3_instruction *out;
+	foreach_output(out, ir)
+		ir3_instr_depth(out, 0, false);
 
 	list_for_each_entry (struct ir3_block, block, &ir->block_list, node) {
 		for (i = 0; i < block->keeps_count; i++)
@@ -261,11 +261,10 @@ compute_depth_and_remove_unused(struct ir3 *ir, struct ir3_shader_variant *so)
 	}
 
 	/* cleanup unused inputs: */
-	for (i = 0; i < ir->ninputs; i++) {
-		struct ir3_instruction *in = ir->inputs[i];
-		if (in && (in->flags & IR3_INSTR_UNUSED))
-			ir->inputs[i] = NULL;
-	}
+	struct ir3_instruction *in;
+	foreach_input_n(in, n, ir)
+		if (in->flags & IR3_INSTR_UNUSED)
+			ir->inputs[n] = NULL;
 
 	return progress;
 }
diff --git a/src/freedreno/ir3/ir3_group.c b/src/freedreno/ir3/ir3_group.c
index e9eb1e58d47..a0b853ca159 100644
--- a/src/freedreno/ir3/ir3_group.c
+++ b/src/freedreno/ir3/ir3_group.c
@@ -247,12 +247,9 @@ find_neighbors(struct ir3 *ir)
 	for (i = 0; i < ir->noutputs; i += 4)
 		group_n(&arr_ops_out, &ir->outputs[i], 4);
 
-	for (i = 0; i < ir->noutputs; i++) {
-		if (ir->outputs[i]) {
-			struct ir3_instruction *instr = ir->outputs[i];
-			instr_find_neighbors(instr);
-		}
-	}
+	struct ir3_instruction *out;
+	foreach_output(out, ir)
+		instr_find_neighbors(out);
 
 	list_for_each_entry (struct ir3_block, block, &ir->block_list, node) {
 		for (i = 0; i < block->keeps_count; i++) {
diff --git a/src/freedreno/ir3/ir3_print.c b/src/freedreno/ir3/ir3_print.c
index a4830ed0a17..f760f57e1a8 100644
--- a/src/freedreno/ir3/ir3_print.c
+++ b/src/freedreno/ir3/ir3_print.c
@@ -321,10 +321,9 @@ ir3_print(struct ir3 *ir)
 	list_for_each_entry (struct ir3_block, block, &ir->block_list, node)
 		print_block(block, 0);
 
-	for (unsigned i = 0; i < ir->noutputs; i++) {
-		if (!ir->outputs[i])
-			continue;
+	struct ir3_instruction *out;
+	foreach_output_n(out, i, ir) {
 		printf("out%d: ", i);
-		print_instr(ir->outputs[i], 0);
+		print_instr(out, 0);
 	}
 }
diff --git a/src/freedreno/ir3/ir3_ra.c b/src/freedreno/ir3/ir3_ra.c
index c3f04ff5aeb..1f24b5eadac 100644
--- a/src/freedreno/ir3/ir3_ra.c
+++ b/src/freedreno/ir3/ir3_ra.c
@@ -944,11 +944,9 @@ ra_add_interference(struct ir3_ra_ctx *ctx)
 	}
 
 	/* need to fix things up to keep outputs live: */
-	for (unsigned i = 0; i < ir->noutputs; i++) {
-		struct ir3_instruction *instr = ir->outputs[i];
-		if (!instr)
-			continue;
-		unsigned name = ra_name(ctx, &ctx->instrd[instr->ip]);
+	struct ir3_instruction *out;
+	foreach_output(out, ir) {
+		unsigned name = ra_name(ctx, &ctx->instrd[out->ip]);
 		ctx->use[name] = ctx->instr_cnt;
 	}
 
diff --git a/src/freedreno/ir3/ir3_sched.c b/src/freedreno/ir3/ir3_sched.c
index f5b9d3bd6f5..a70251374ee 100644
--- a/src/freedreno/ir3/ir3_sched.c
+++ b/src/freedreno/ir3/ir3_sched.c
@@ -170,14 +170,9 @@ update_use_count(struct ir3 *ir)
 
 	/* Shader outputs are also used:
 	 */
-	for (unsigned i = 0; i <  ir->noutputs; i++) {
-		struct ir3_instruction  *out = ir->outputs[i];
-
-		if (!out)
-			continue;
-
+	struct ir3_instruction *out;
+	foreach_output(out, ir)
 		use_instr(out);
-	}
 }
 
 #define NULL_INSTR ((void *)~0)
diff --git a/src/freedreno/ir3/ir3_shader.c b/src/freedreno/ir3/ir3_shader.c
index 05c8567ab99..2f5777c4ec8 100644
--- a/src/freedreno/ir3/ir3_shader.c
+++ b/src/freedreno/ir3/ir3_shader.c
@@ -380,12 +380,9 @@ ir3_shader_disasm(struct ir3_shader_variant *so, uint32_t *bin, FILE *out)
 	uint8_t regid;
 	unsigned i;
 
-	for (i = 0; i < ir->ninputs; i++) {
-		if (!ir->inputs[i]) {
-			fprintf(out, "; in%d unused\n", i);
-			continue;
-		}
-		reg = ir->inputs[i]->regs[0];
+	struct ir3_instruction *instr;
+	foreach_input_n(instr, i, ir) {
+		reg = instr->regs[0];
 		regid = reg->num;
 		fprintf(out, "@in(%sr%d.%c)\tin%d\n",
 				(reg->flags & IR3_REG_HALF) ? "h" : "",
@@ -402,12 +399,8 @@ ir3_shader_disasm(struct ir3_shader_variant *so, uint32_t *bin, FILE *out)
 				fetch->wrmask, fetch->cmd);
 	}
 
-	for (i = 0; i < ir->noutputs; i++) {
-		if (!ir->outputs[i]) {
-			fprintf(out, "; out%d unused\n", i);
-			continue;
-		}
-		reg = ir->outputs[i]->regs[0];
+	foreach_output_n(instr, i, ir) {
+		reg = instr->regs[0];
 		regid = reg->num;
 		fprintf(out, "@out(%sr%d.%c)\tout%d\n",
 				(reg->flags & IR3_REG_HALF) ? "h" : "",
diff --git a/src/freedreno/ir3/ir3_sun.c b/src/freedreno/ir3/ir3_sun.c
index 413eaabef88..c31e03129f0 100644
--- a/src/freedreno/ir3/ir3_sun.c
+++ b/src/freedreno/ir3/ir3_sun.c
@@ -96,9 +96,9 @@ ir3_sun(struct ir3 *ir)
 
 	ir3_clear_mark(ir);
 
-	for (unsigned i = 0; i < ir->noutputs; i++)
-		if (ir->outputs[i])
-			max = MAX2(max, number_instr(ir->outputs[i]));
+	struct ir3_instruction *out;
+	foreach_output(out, ir)
+		max = MAX2(max, number_instr(out));
 
 	list_for_each_entry (struct ir3_block, block, &ir->block_list, node) {
 		for (unsigned i = 0; i < block->keeps_count; i++)
-- 
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