From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Date: Thu, 15 Aug 2019 15:16:38 +0000 (-0700)
Subject: pan/midgard: Add mir_exit_block helper
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=07c960cac061ebfd0d8a0789dd1e86bc0ca4c08a;p=mesa.git

pan/midgard: Add mir_exit_block helper

The exit block is gauranteed to be empty, signaling the end of the
program.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
---

diff --git a/src/panfrost/midgard/compiler.h b/src/panfrost/midgard/compiler.h
index fb47c3475bf..e51ea8ba602 100644
--- a/src/panfrost/midgard/compiler.h
+++ b/src/panfrost/midgard/compiler.h
@@ -377,6 +377,19 @@ mir_get_block(compiler_context *ctx, int idx)
         return (struct midgard_block *) lst;
 }
 
+static inline midgard_block *
+mir_exit_block(struct compiler_context *ctx)
+{
+        midgard_block *last = list_last_entry(&ctx->blocks,
+                        struct midgard_block, link);
+
+        /* The last block must be empty (the exit block) */
+        assert(list_empty(&last->instructions));
+        assert(last->nr_successors == 0);
+
+        return last;
+}
+
 static inline bool
 mir_is_alu_bundle(midgard_bundle *bundle)
 {