From 893fc2d07d382c0b9563c0b48215a0e260f17d4b Mon Sep 17 00:00:00 2001 From: Jason Ekstrand Date: Thu, 28 Jun 2018 19:46:01 -0700 Subject: [PATCH] nir: Add a deref_instr_has_indirect helper Reviewed-by: Timothy Arceri Reviewed-by: Iago Toral Quiroga Reviewed-by: Kenneth Graunke --- src/compiler/nir/nir.h | 2 ++ src/compiler/nir/nir_deref.c | 18 ++++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index c16ce54..e35bef6 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -987,6 +987,8 @@ nir_deref_instr_get_variable(const nir_deref_instr *instr) return instr->var; } +bool nir_deref_instr_has_indirect(nir_deref_instr *instr); + bool nir_deref_instr_remove_if_unused(nir_deref_instr *instr); typedef struct { diff --git a/src/compiler/nir/nir_deref.c b/src/compiler/nir/nir_deref.c index 1a00157..22ecde4 100644 --- a/src/compiler/nir/nir_deref.c +++ b/src/compiler/nir/nir_deref.c @@ -103,6 +103,24 @@ nir_deref_instr_remove_if_unused(nir_deref_instr *instr) } bool +nir_deref_instr_has_indirect(nir_deref_instr *instr) +{ + while (instr->deref_type != nir_deref_type_var) { + /* Consider casts to be indirects */ + if (instr->deref_type == nir_deref_type_cast) + return true; + + if (instr->deref_type == nir_deref_type_array && + !nir_src_as_const_value(instr->arr.index)) + return true; + + instr = nir_deref_instr_parent(instr); + } + + return false; +} + +bool nir_remove_dead_derefs_impl(nir_function_impl *impl) { bool progress = false; -- 2.7.4