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nir: fix warning in nir_lower_io.c

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Initialize the variable with NULL.  Fixes the following

    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;
                     ^~~~

v2: Avoid using a 'default' case so we get help from the compiler when
    new deref types are added. (Lionel)

Acked-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Caio Marcelo de Oliveira Filho 2019-01-08 09:31:29 -08:00
parent 3cb65cf8aa
commit baabfb1959
1 changed files with 1 additions and 1 deletions
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2
src/compiler/nir/nir_lower_io.c
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@ -732,7 +732,7 @@ lower_explicit_io_deref(nir_builder *b, nir_deref_instr *deref,
assert(deref->parent.is_ssa);
nir_ssa_def *parent_addr = deref->parent.ssa;
nir_ssa_def *addr;
nir_ssa_def *addr = NULL;
assert(deref->dest.is_ssa);
switch (deref->deref_type) {
case nir_deref_type_var: