Thanks I'd been meaning to do this too.

Reviewed-by: Timothy Arceri <tarc...@itsqueeze.com>

Do you have commit access?

On 18/08/18 00:32, Kai Wasserbäch wrote:
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 <k...@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 */

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