intel/compiler: Silence warning about value that may be used uninitialized

For some reason, this warning only occurs for me in release builds.

In file included from src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c:25:0:
src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c: In function ‘brw_nir_lower_mem_access_bit_sizes’:
src/compiler/nir/nir_builder.h:501:26: warning: ‘src_swiz[2]’ may be used uninitialized in this function [-Wmaybe-uninitialized]
       alu_src.swizzle[i] = swiz[i];
       ~~~~~~~~~~~~~~~~~~~^~~~~~~~~
src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c:225:16: note: ‘src_swiz[2]’ was declared here
       unsigned src_swiz[4];
                ^~~~~~~~

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

diff --git a/src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c b/src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c
index 40ecbb2..0396f5f 100644 (file)
--- a/src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c
+++ b/src/intel/compiler/brw_nir_lower_mem_access_bit_sizes.c
@@ -222,7 +222,7 @@ lower_mem_store_bit_size(nir_builder *b, nir_intrinsic_instr *intrin)
       const unsigned store_src_comps = store_bytes / (bit_size / 8);
       assert(store_first_src_comp + store_src_comps <= num_components);
 
-      unsigned src_swiz[4];
+      unsigned src_swiz[4] = { 0, };
       for (unsigned i = 0; i < store_src_comps; i++)
          src_swiz[i] = store_first_src_comp + i;
       nir_ssa_def *store_value =