[Mesa-dev] [PATCH 2/4] nir: mark *prev_block as MAYBE_UNUSED in opt_peel_loop_initial_if

[Kai Wasserbäch]

Only used, when asserts are enabled.

Fixes an unused-variable warning with gcc-8:
 ../../../src/compiler/nir/nir_opt_if.c: In function 'opt_peel_loop_initial_if':
 ../../../src/compiler/nir/nir_opt_if.c:109:15: warning: unused variable 'prev_block' [-Wunused-variable]
     nir_block *prev_block =
                ^~~~~~~~~~

Signed-off-by: Kai Wasserbäch <kai at dev.carbon-project.org>
---
 src/compiler/nir/nir_opt_if.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_opt_if.c b/src/compiler/nir/nir_opt_if.c
index b3d0bf1dec..dacf2d6c66 100644
--- a/src/compiler/nir/nir_opt_if.c
+++ b/src/compiler/nir/nir_opt_if.c
@@ -106,7 +106,7 @@ static bool
 opt_peel_loop_initial_if(nir_loop *loop)
 {
    nir_block *header_block = nir_loop_first_block(loop);
-   nir_block *prev_block =
+   MAYBE_UNUSED nir_block *prev_block =
       nir_cf_node_as_block(nir_cf_node_prev(&loop->cf_node));
 
    /* It would be insane if this were not true */
-- 
2.18.0