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nir: add nir_def_as_* helpers

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We want to get rid of nir_def::parent_instr eventually, requiring an accessor
function instead nir_def_parent_instr(def), so to mitigate the hit to NIR
ergonomics, let's add helpers for common patterns using parent_instr. This gets
us an immediate win for NIR ergonomics and then reduces the surface area for the
later flag day hiding parent_instr.

This commit starts us off by adding compositions for nir_instr_as_* with
parent_instr's, which are common.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Marek Olšák <maraeo@gmail.com>
Acked-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36489>
This commit is contained in:
Alyssa Rosenzweig 2025-07-31 09:19:31 -04:00 • committed by Marge Bot
parent 71eefb977b
commit 3624f054f2
1 changed files with 15 additions and 0 deletions
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15
src/compiler/nir/nir.h
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@ -2853,6 +2853,21 @@ NIR_DEFINE_SRC_AS_CONST(double, float)
#undef NIR_DEFINE_SRC_AS_CONST
#define NIR_DEFINE_DEF_AS_INSTR(type, suffix) \
static inline type *nir_def_as_##suffix(const nir_def *def) \
{ \
return nir_instr_as_##suffix(def->parent_instr); \
}
NIR_DEFINE_DEF_AS_INSTR(nir_alu_instr, alu)
NIR_DEFINE_DEF_AS_INSTR(nir_intrinsic_instr, intrinsic)
NIR_DEFINE_DEF_AS_INSTR(nir_tex_instr, tex)
NIR_DEFINE_DEF_AS_INSTR(nir_phi_instr, phi)
NIR_DEFINE_DEF_AS_INSTR(nir_deref_instr, deref)
NIR_DEFINE_DEF_AS_INSTR(nir_load_const_instr, load_const)
#undef NIR_DEFINE_DEF_AS_INSTR
typedef struct nir_scalar {
nir_def *def;
unsigned comp;