[Mesa-dev] [PATCH] nir: fix warning in nir_lower_io.c

[Caio Marcelo de Oliveira Filho]

Add unreachable case for invalid deref type. Fixes the warning below

    In file included from ../src/compiler/nir/nir_lower_io.c:34:
    ../src/compiler/nir/nir_lower_io.c: In function ‘nir_lower_explicit_io’:
    ../src/compiler/nir/nir.h:668:11: warning: ‘addr’ may be used uninitialized in this function [-Wmaybe-uninitialized]
        return src;
               ^~~
    ../src/compiler/nir/nir_lower_io.c:735:17: note: ‘addr’ was declared here
        nir_ssa_def *addr;
                     ^~~~
---
 src/compiler/nir/nir_lower_io.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
index bcbfebdfa3b..4a322da609e 100644
--- a/src/compiler/nir/nir_lower_io.c
+++ b/src/compiler/nir/nir_lower_io.c
@@ -783,6 +783,10 @@ lower_explicit_io_deref(nir_builder *b, nir_deref_instr *deref,
       /* Nothing to do here */
       addr = parent_addr;
       break;
+
+   default:
+      unreachable("Invalid deref type");
+      break;
    }
 
    nir_instr_remove(&deref->instr);
-- 
2.20.0