freedreno/ir3: add assert

The special handling for last_input assumes that all the varying loads
are in the first block.  Add an assert to catch if anyone breaks that
assumption.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/freedreno/ir3/ir3_legalize.c b/src/freedreno/ir3/ir3_legalize.c
index e28cac216b5510cccb5817c3a36416ba02f2562a..a5e5fd1fa26a52d0c976baa88ce20d7956b50ad2 100644 (file)
--- a/src/freedreno/ir3/ir3_legalize.c
+++ b/src/freedreno/ir3/ir3_legalize.c
@@ -278,6 +278,8 @@ legalize_block(struct ir3_legalize_ctx *ctx, struct ir3_block *block)
        }
 
        if (last_input) {
+               assert(block == list_first_entry(&block->shader->block_list,
+                               struct ir3_block, node));
                /* special hack.. if using ldlv to bypass interpolation,
                 * we need to insert a dummy bary.f on which we can set
                 * the (ei) flag: