Mesa (master): freedreno/ir3/ra: add helper to map name to array

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Module: Mesa
Branch: master
Commit: 0e7d24b532e1a52cb5b3da36d1ed5b2204fb0acb
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0e7d24b532e1a52cb5b3da36d1ed5b2204fb0acb

Author: Rob Clark <robdclark at chromium.org>
Date:   Sat Mar 21 11:25:36 2020 -0700

freedreno/ir3/ra: add helper to map name to array

For vreg names that refer to arrays rather than SSA values, this is the
counterpart to name_to_instr().

Signed-off-by: Rob Clark <robdclark at chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4272>

---

 src/freedreno/ir3/ir3_ra.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/freedreno/ir3/ir3_ra.c b/src/freedreno/ir3/ir3_ra.c
index df5f115c0b3..ccba90be552 100644
--- a/src/freedreno/ir3/ir3_ra.c
+++ b/src/freedreno/ir3/ir3_ra.c
@@ -105,6 +105,9 @@
 
 static struct ir3_instruction * name_to_instr(struct ir3_ra_ctx *ctx, unsigned name);
 
+static bool name_is_array(struct ir3_ra_ctx *ctx, unsigned name);
+static struct ir3_array * name_to_array(struct ir3_ra_ctx *ctx, unsigned name);
+
 /* does it conflict? */
 static inline bool
 intersects(unsigned a_start, unsigned a_end, unsigned b_start, unsigned b_end)
@@ -500,10 +503,30 @@ ra_init(struct ir3_ra_ctx *ctx)
 static struct ir3_instruction *
 name_to_instr(struct ir3_ra_ctx *ctx, unsigned name)
 {
+	assert(!name_is_array(ctx, name));
 	struct hash_entry *entry = _mesa_hash_table_search(ctx->name_to_instr, &name);
 	if (entry)
 		return entry->data;
-	unreachable("invalid name");
+	unreachable("invalid instr name");
+	return NULL;
+}
+
+static bool
+name_is_array(struct ir3_ra_ctx *ctx, unsigned name)
+{
+	return name >= ctx->class_base[total_class_count];
+}
+
+static struct ir3_array *
+name_to_array(struct ir3_ra_ctx *ctx, unsigned name)
+{
+	assert(name_is_array(ctx, name));
+	foreach_array (arr, &ctx->ir->array_list) {
+		unsigned sz = reg_size_for_array(arr);
+		if (name < (arr->base + sz))
+			return arr;
+	}
+	unreachable("invalid array name");
 	return NULL;
 }