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nir: mark *prev_block as MAYBE_UNUSED in opt_peel_loop_initial_if 

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@dev.carbon-project.org>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Kai Wasserbäch 2018-08-17 16:32:32 +02:00 committed by Timothy Arceri
parent 9387ca29ae
commit 6f0647c0b2
1 changed files with 1 additions and 1 deletions
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2
src/compiler/nir/nir_opt_if.c
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@ -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 */