nir: Rework nir_src_as_alu_instr to not take a pointer

Other nir_src_as_* functions just take a nir_src.  It's not that much
more memory copying and the constness preserving really isn't worth the
cognitive dissonance.

Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Caio Marcelo de Oliveira Filho <[email protected]>

4 files changed, 18 insertions, 26 deletions

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 672151f3279..91ab40a9482 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2756,16 +2756,10 @@ nir_src_instr(const struct nir_src *src)
 
 #define NIR_SRC_AS_(name, c_type, type_enum, cast_macro)                \
 static inline c_type *                                                  \
-nir_src_as_ ## name (nir_src *src)                                      \
+nir_src_as_ ## name (nir_src src)                                       \
 {                                                                       \
-    return src->is_ssa && src->ssa->parent_instr->type == type_enum     \
-           ? cast_macro(src->ssa->parent_instr) : NULL;                 \
-}                                                                       \
-static inline const c_type *                                            \
-nir_src_as_ ## name ## _const(const nir_src *src)                       \
-{                                                                       \
-    return src->is_ssa && src->ssa->parent_instr->type == type_enum     \
-           ? cast_macro(src->ssa->parent_instr) : NULL;                 \
+    return src.is_ssa && src.ssa->parent_instr->type == type_enum       \
+           ? cast_macro(src.ssa->parent_instr) : NULL;                  \
 }
 
 NIR_SRC_AS_(alu_instr, nir_alu_instr, nir_instr_type_alu, nir_instr_as_alu)
diff --git a/src/compiler/nir/nir_instr_set.c b/src/compiler/nir/nir_instr_set.c
index 6605d2a1ab3..bd62bc974ed 100644
--- a/src/compiler/nir/nir_instr_set.c
+++ b/src/compiler/nir/nir_instr_set.c
@@ -281,10 +281,10 @@ nir_srcs_equal(nir_src src1, nir_src src2)
  * that instruction is returned as a \c nir_alu_instr.  Otherwise \c NULL is
  * returned.
  */
-static const nir_alu_instr *
-get_neg_instr(const nir_src *s)
+static nir_alu_instr *
+get_neg_instr(nir_src s)
 {
-   const nir_alu_instr *const alu = nir_src_as_alu_instr_const(s);
+   nir_alu_instr *alu = nir_src_as_alu_instr(s);
 
    return alu != NULL && (alu->op == nir_op_fneg || alu->op == nir_op_ineg)
           ? alu : NULL;
@@ -440,7 +440,7 @@ nir_alu_srcs_negative_equal(const nir_alu_instr *alu1,
 
    uint8_t alu1_swizzle[4] = {0};
    nir_src alu1_actual_src;
-   const nir_alu_instr *const neg1 = get_neg_instr(&alu1->src[src1].src);
+   nir_alu_instr *neg1 = get_neg_instr(alu1->src[src1].src);
 
    if (neg1) {
       parity = !parity;
@@ -457,7 +457,7 @@ nir_alu_srcs_negative_equal(const nir_alu_instr *alu1,
 
    uint8_t alu2_swizzle[4] = {0};
    nir_src alu2_actual_src;
-   const nir_alu_instr *const neg2 = get_neg_instr(&alu2->src[src2].src);
+   nir_alu_instr *neg2 = get_neg_instr(alu2->src[src2].src);
 
    if (neg2) {
       parity = !parity;
diff --git a/src/compiler/nir/tests/vars_tests.cpp b/src/compiler/nir/tests/vars_tests.cpp
index 9e0b5d2c0df..d27a9c0fb1d 100644
--- a/src/compiler/nir/tests/vars_tests.cpp
+++ b/src/compiler/nir/tests/vars_tests.cpp
@@ -509,7 +509,7 @@ TEST_F(nir_copy_prop_vars_test, load_direct_array_deref_on_vector_reuses_previou
    ASSERT_TRUE(store->src[1].is_ssa);
 
    /* NOTE: The ALU instruction is how we get the vec.y. */
-   ASSERT_TRUE(nir_src_as_alu_instr(&store->src[1]));
+   ASSERT_TRUE(nir_src_as_alu_instr(store->src[1]));
 }
 
 TEST_F(nir_copy_prop_vars_test, load_direct_array_deref_on_vector_reuses_previous_copy)
@@ -567,7 +567,7 @@ TEST_F(nir_copy_prop_vars_test, load_direct_array_deref_on_vector_gets_reused)
 
    nir_intrinsic_instr *store = get_intrinsic(nir_intrinsic_store_deref, 1);
    ASSERT_TRUE(store->src[1].is_ssa);
-   ASSERT_TRUE(nir_src_as_alu_instr(&store->src[1]));
+   ASSERT_TRUE(nir_src_as_alu_instr(store->src[1]));
 }
 
 TEST_F(nir_copy_prop_vars_test, store_load_direct_array_deref_on_vector)
@@ -612,7 +612,7 @@ TEST_F(nir_copy_prop_vars_test, store_load_direct_array_deref_on_vector)
    /* Fourth store will compose first and second store values. */
    nir_intrinsic_instr *fourth_store = get_intrinsic(nir_intrinsic_store_deref, 3);
    ASSERT_TRUE(fourth_store->src[1].is_ssa);
-   EXPECT_TRUE(nir_src_as_alu_instr(&fourth_store->src[1]));
+   EXPECT_TRUE(nir_src_as_alu_instr(fourth_store->src[1]));
 }
 
 TEST_F(nir_copy_prop_vars_test, store_load_indirect_array_deref_on_vector)
@@ -990,7 +990,7 @@ TEST_F(nir_combine_stores_test, non_overlapping_stores)
    ASSERT_EQ(nir_intrinsic_write_mask(combined), 0xf);
    ASSERT_EQ(nir_intrinsic_get_var(combined, 0), out);
 
-   nir_alu_instr *vec = nir_src_as_alu_instr(&combined->src[1]);
+   nir_alu_instr *vec = nir_src_as_alu_instr(combined->src[1]);
    ASSERT_TRUE(vec);
    for (int i = 0; i < 4; i++) {
       nir_intrinsic_instr *load =
@@ -1030,7 +1030,7 @@ TEST_F(nir_combine_stores_test, overlapping_stores)
    ASSERT_EQ(nir_intrinsic_write_mask(combined), 0xf);
    ASSERT_EQ(nir_intrinsic_get_var(combined, 0), out);
 
-   nir_alu_instr *vec = nir_src_as_alu_instr(&combined->src[1]);
+   nir_alu_instr *vec = nir_src_as_alu_instr(combined->src[1]);
    ASSERT_TRUE(vec);
 
    /* Component x comes from v[0]. */
@@ -1100,7 +1100,7 @@ TEST_F(nir_combine_stores_test, direct_array_derefs)
    ASSERT_EQ(nir_intrinsic_write_mask(combined), 0xf);
    ASSERT_EQ(nir_intrinsic_get_var(combined, 0), out);
 
-   nir_alu_instr *vec = nir_src_as_alu_instr(&combined->src[1]);
+   nir_alu_instr *vec = nir_src_as_alu_instr(combined->src[1]);
    ASSERT_TRUE(vec);
 
    /* Component x comes from v[0]. */
diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index f611b261784..ac566be7476 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -387,7 +387,7 @@ fs_visitor::nir_emit_if(nir_if *if_stmt)
    /* If the condition has the form !other_condition, use other_condition as
     * the source, but invert the predicate on the if instruction.
     */
-   nir_alu_instr *const cond = nir_src_as_alu_instr(&if_stmt->condition);
+   nir_alu_instr *cond = nir_src_as_alu_instr(if_stmt->condition);
    if (cond != NULL && cond->op == nir_op_inot) {
       assert(!cond->src[0].negate);
       assert(!cond->src[0].abs);
@@ -754,8 +754,7 @@ fs_visitor::resolve_inot_sources(const fs_builder &bld, nir_alu_instr *instr,
                                  fs_reg *op)
 {
    for (unsigned i = 0; i < 2; i++) {
-      nir_alu_instr *const inot_instr =
-         nir_src_as_alu_instr(&instr->src[i].src);
+      nir_alu_instr *inot_instr = nir_src_as_alu_instr(instr->src[i].src);
 
       if (inot_instr != NULL && inot_instr->op == nir_op_inot &&
           !inot_instr->src[0].abs && !inot_instr->src[0].negate) {
@@ -778,7 +777,7 @@ fs_visitor::try_emit_b2fi_of_inot(const fs_builder &bld,
    if (devinfo->gen < 6 || devinfo->gen >= 12)
       return false;
 
-   nir_alu_instr *const inot_instr = nir_src_as_alu_instr(&instr->src[0].src);
+   nir_alu_instr *inot_instr = nir_src_as_alu_instr(instr->src[0].src);
 
    if (inot_instr == NULL || inot_instr->op != nir_op_inot)
       return false;
@@ -1242,8 +1241,7 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
 
    case nir_op_inot:
       if (devinfo->gen >= 8) {
-         nir_alu_instr *const inot_src_instr =
-            nir_src_as_alu_instr(&instr->src[0].src);
+         nir_alu_instr *inot_src_instr = nir_src_as_alu_instr(instr->src[0].src);
 
          if (inot_src_instr != NULL &&
              (inot_src_instr->op == nir_op_ior ||