From 7c694d53428503b09f1a0b6b286e86e3ec7b8720 Mon Sep 17 00:00:00 2001
From: Mary Guillemard <mary.guillemard@collabora.com>
Date: Fri, 2 Aug 2024 09:42:34 +0200
Subject: [PATCH] bi: Add loop_header in bi_block

Will be used for some DCE changes

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30484>
---
 src/panfrost/compiler/bifrost_compile.c | 1 +
 src/panfrost/compiler/compiler.h        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/panfrost/compiler/bifrost_compile.c b/src/panfrost/compiler/bifrost_compile.c
index 15e61c9dca9..0671e1a92b5 100644
--- a/src/panfrost/compiler/bifrost_compile.c
+++ b/src/panfrost/compiler/bifrost_compile.c
@@ -4056,6 +4056,7 @@ emit_loop(bi_context *ctx, nir_loop *nloop)
    ctx->continue_block = create_empty_block(ctx);
    ctx->break_block = create_empty_block(ctx);
    ctx->after_block = ctx->continue_block;
+   ctx->after_block->loop_header = true;
 
    /* Emit the body itself */
    emit_cf_list(ctx, &nloop->body);
diff --git a/src/panfrost/compiler/compiler.h b/src/panfrost/compiler/compiler.h
index a1820bef041..4c708b4c041 100644
--- a/src/panfrost/compiler/compiler.h
+++ b/src/panfrost/compiler/compiler.h
@@ -713,6 +713,7 @@ typedef struct bi_block {
    struct bi_block *successors[2];
    struct util_dynarray predecessors;
    bool unconditional_jumps;
+   bool loop_header;
 
    /* Per 32-bit word live masks for the block indexed by node */
    uint8_t *live_in;