[Mesa-dev] [RFC 7/9] nir/nir: Use a linked list instead of a has set for use/def sets
Connor Abbott
cwabbott0 at gmail.com
Mon Apr 27 13:35:10 PDT 2015
On Fri, Apr 24, 2015 at 7:32 PM, Jason Ekstrand <jason at jlekstrand.net> wrote:
> This commit switches us from the current setup of using hash sets for
> use/def sets to using linked lists. Doing so should save us quite a bit of
> memory because we aren't carrying around 3 hash sets per register and 2 per
> SSA value. It should also save us CPU time because adding/removing things
> from use/def sets is 4 pointer manipulations instead of a hash lookup.
>
> On the code complexity side of things, some things are now much easier and
> others are a bit harder. One of the operations we perform constantly in
> optimization passes is to replace one source with another. Due to the fact
> that an instruction can use the same SSA value multiple times, we had to
> iterate through the sources of the instruction and determine if the use we
> were replacing was the only one before removing it from the set of uses.
> With this patch, uses are per-source not per-instruction so we can just
> remove it safely. On the other hand, trying to iterate over all of the
> instructions that use a given value is more difficult. Fortunately, the
> two places we do that are the ffma peephole where it doesn't matter and GCM
> where we already gracefully handle duplicates visits to an instruction.
>
> Another aspect here is that using linked lists in this way can be tricky to
> get right. With sets, things were quite forgiving and the worst that
> happened if you didn't properly remove a use was that it would get caught
> in the validator. With linked lists, it can lead to linked list corruption
> which can be harder to track. However, we do just as much validation of
> the linked lists as we did of the sets so the validator should still catch
> these problems. While working on this series, the vast majority of the
> bugs I had to fix were caught by assertions. I don't think the lists are
> going to be that much worse than the sets.
> ---
> src/glsl/nir/nir.c | 232 ++++++++++++++++----------------------------
> src/glsl/nir/nir.h | 27 ++++--
> src/glsl/nir/nir_validate.c | 158 +++++++++++++++---------------
> 3 files changed, 182 insertions(+), 235 deletions(-)
>
> diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c
> index b8f5dd4..283b861 100644
> --- a/src/glsl/nir/nir.c
> +++ b/src/glsl/nir/nir.c
> @@ -58,12 +58,9 @@ reg_create(void *mem_ctx, struct exec_list *list)
> nir_register *reg = ralloc(mem_ctx, nir_register);
>
> reg->parent_instr = NULL;
> - reg->uses = _mesa_set_create(reg, _mesa_hash_pointer,
> - _mesa_key_pointer_equal);
> - reg->defs = _mesa_set_create(reg, _mesa_hash_pointer,
> - _mesa_key_pointer_equal);
> - reg->if_uses = _mesa_set_create(reg, _mesa_hash_pointer,
> - _mesa_key_pointer_equal);
> + nir_list_init(®->uses);
> + nir_list_init(®->defs);
> + nir_list_init(®->if_uses);
>
> reg->num_components = 0;
> reg->num_array_elems = 0;
> @@ -1070,11 +1067,14 @@ update_if_uses(nir_cf_node *node)
>
> nir_if *if_stmt = nir_cf_node_as_if(node);
>
> - struct set *if_uses_set = if_stmt->condition.is_ssa ?
> - if_stmt->condition.ssa->if_uses :
> - if_stmt->condition.reg.reg->uses;
> -
> - _mesa_set_add(if_uses_set, if_stmt);
> + if_stmt->condition.parent_if = if_stmt;
> + if (if_stmt->condition.is_ssa) {
> + nir_list_push_tail(&if_stmt->condition.ssa->if_uses,
> + &if_stmt->condition.use_link);
> + } else {
> + nir_list_push_tail(&if_stmt->condition.reg.reg->if_uses,
> + &if_stmt->condition.use_link);
> + }
> }
>
> void
> @@ -1227,16 +1227,7 @@ cleanup_cf_node(nir_cf_node *node)
> foreach_list_typed(nir_cf_node, child, node, &if_stmt->else_list)
> cleanup_cf_node(child);
>
> - struct set *if_uses;
> - if (if_stmt->condition.is_ssa) {
> - if_uses = if_stmt->condition.ssa->if_uses;
> - } else {
> - if_uses = if_stmt->condition.reg.reg->if_uses;
> - }
> -
> - struct set_entry *entry = _mesa_set_search(if_uses, if_stmt);
> - assert(entry);
> - _mesa_set_remove(if_uses, entry);
> + nir_link_remove(&if_stmt->condition.use_link);
> break;
> }
>
> @@ -1293,9 +1284,10 @@ add_use_cb(nir_src *src, void *state)
> {
> nir_instr *instr = state;
>
> - struct set *uses_set = src->is_ssa ? src->ssa->uses : src->reg.reg->uses;
> -
> - _mesa_set_add(uses_set, instr);
> + src->parent_instr = instr;
> + nir_link_init(&src->use_link);
> + nir_list *uses_list = src->is_ssa ? &src->ssa->uses : &src->reg.reg->uses;
> + nir_list_push_tail(uses_list, &src->use_link);
>
> return true;
> }
> @@ -1320,8 +1312,11 @@ add_reg_def_cb(nir_dest *dest, void *state)
> {
> nir_instr *instr = state;
>
> - if (!dest->is_ssa)
> - _mesa_set_add(dest->reg.reg->defs, instr);
> + if (!dest->is_ssa) {
> + dest->reg.parent_instr = instr;
> + nir_link_init(&dest->reg.def_link);
> + nir_list_push_tail(&dest->reg.reg->defs, &dest->reg.def_link);
> + }
>
> return true;
> }
> @@ -1436,13 +1431,7 @@ nir_instr_insert_after_cf_list(struct exec_list *list, nir_instr *after)
> static bool
> remove_use_cb(nir_src *src, void *state)
> {
> - nir_instr *instr = state;
> -
> - struct set *uses_set = src->is_ssa ? src->ssa->uses : src->reg.reg->uses;
> -
> - struct set_entry *entry = _mesa_set_search(uses_set, instr);
> - if (entry)
> - _mesa_set_remove(uses_set, entry);
> + nir_link_remove(&src->use_link);
>
> return true;
> }
> @@ -1450,16 +1439,8 @@ remove_use_cb(nir_src *src, void *state)
> static bool
> remove_def_cb(nir_dest *dest, void *state)
> {
> - nir_instr *instr = state;
> -
> - if (dest->is_ssa)
> - return true;
> -
> - nir_register *reg = dest->reg.reg;
> -
> - struct set_entry *entry = _mesa_set_search(reg->defs, instr);
> - if (entry)
> - _mesa_set_remove(reg->defs, entry);
> + if (!dest->is_ssa)
> + nir_link_remove(&dest->reg.def_link);
>
> return true;
> }
> @@ -1834,86 +1815,71 @@ nir_srcs_equal(nir_src src1, nir_src src2)
> }
>
> static bool
> -src_does_not_use_def(nir_src *src, void *void_def)
> +src_is_valid(const nir_src *src)
> {
> - nir_ssa_def *def = void_def;
> -
> - if (src->is_ssa) {
> - return src->ssa != def;
> - } else {
> - return true;
> - }
> + return src->is_ssa ? (src->ssa != NULL) : (src->reg.reg != NULL);
> }
>
> -static bool
> -src_does_not_use_reg(nir_src *src, void *void_reg)
> +static void
> +src_remove_all_uses(nir_src *src)
> {
> - nir_register *reg = void_reg;
> + for (; src; src = src->is_ssa ? NULL : src->reg.indirect) {
> + if (!src_is_valid(src))
> + continue;
>
> - if (src->is_ssa) {
> - return true;
> - } else {
> - return src->reg.reg != reg;
> + nir_link_remove(&src->use_link);
> }
> }
>
> -void
> -nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src)
> +static void
> +src_add_all_uses(nir_src *src, nir_instr *parent_instr, nir_if *parent_if)
> {
> - nir_src old_src = *src;
> - *src = new_src;
> + for (; src; src = src->is_ssa ? NULL : src->reg.indirect) {
> + if (!src_is_valid(src))
> + continue;
>
> - for (nir_src *iter_src = &old_src; iter_src;
> - iter_src = iter_src->is_ssa ? NULL : iter_src->reg.indirect) {
> - if (iter_src->is_ssa) {
> - nir_ssa_def *ssa = iter_src->ssa;
> - if (ssa && nir_foreach_src(instr, src_does_not_use_def, ssa)) {
> - struct set_entry *entry = _mesa_set_search(ssa->uses, instr);
> - assert(entry);
> - _mesa_set_remove(ssa->uses, entry);
> - }
> + /* This source may have been mostly uninitialized or have come from
> + * another instruction. In either of these cases, the parent field
> + * and list link will be uninitialized so we initialize them here.
> + */
> + nir_link_init(&src->use_link);
> +
> + if (parent_instr) {
> + src->parent_instr = parent_instr;
> + if (src->is_ssa)
> + nir_list_push_tail(&src->ssa->uses, &src->use_link);
> + else
> + nir_list_push_tail(&src->reg.reg->uses, &src->use_link);
> } else {
> - nir_register *reg = iter_src->reg.reg;
> - if (reg && nir_foreach_src(instr, src_does_not_use_reg, reg)) {
> - struct set_entry *entry = _mesa_set_search(reg->uses, instr);
> - assert(entry);
> - _mesa_set_remove(reg->uses, entry);
> - }
> + assert(parent_if);
> + src->parent_if = parent_if;
> + if (src->is_ssa)
> + nir_list_push_tail(&src->ssa->if_uses, &src->use_link);
> + else
> + nir_list_push_tail(&src->reg.reg->if_uses, &src->use_link);
> }
> }
> +}
>
> - for (nir_src *iter_src = &new_src; iter_src;
> - iter_src = iter_src->is_ssa ? NULL : iter_src->reg.indirect) {
> - if (iter_src->is_ssa) {
> - if (iter_src->ssa)
> - _mesa_set_add(iter_src->ssa->uses, instr);
> - } else {
> - if (iter_src->reg.reg)
> - _mesa_set_add(iter_src->reg.reg->uses, instr);
> - }
> - }
> +void
> +nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src)
> +{
> + assert(!src_is_valid(src) || src->parent_instr == instr);
> +
> + src_remove_all_uses(src);
> + *src = new_src;
> + src_add_all_uses(src, instr, NULL);
> }
>
> void
> nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src)
> {
> - for (nir_src *src = &if_stmt->condition; src;
> - src = src->is_ssa ? NULL : src->reg.indirect) {
> - struct set *uses = src->is_ssa ? src->ssa->if_uses
> - : src->reg.reg->if_uses;
> - struct set_entry *entry = _mesa_set_search(uses, if_stmt);
> - assert(entry);
> - _mesa_set_remove(uses, entry);
> - }
> -
> - if_stmt->condition = new_src;
> + nir_src *src = &if_stmt->condition;
> + assert(!src_is_valid(src) || src->parent_if == if_stmt);
>
> - for (nir_src *src = &if_stmt->condition; src;
> - src = src->is_ssa ? NULL : src->reg.indirect) {
> - struct set *uses = src->is_ssa ? src->ssa->if_uses
> - : src->reg.reg->if_uses;
> - _mesa_set_add(uses, if_stmt);
> - }
> + src_remove_all_uses(src);
> + *src = new_src;
> + src_add_all_uses(src, NULL, if_stmt);
> }
>
> void
> @@ -1922,10 +1888,8 @@ nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def,
> {
> def->name = name;
> def->parent_instr = instr;
> - def->uses = _mesa_set_create(instr, _mesa_hash_pointer,
> - _mesa_key_pointer_equal);
> - def->if_uses = _mesa_set_create(instr, _mesa_hash_pointer,
> - _mesa_key_pointer_equal);
> + nir_list_init(&def->uses);
> + nir_list_init(&def->if_uses);
> def->num_components = num_components;
>
> if (instr->block) {
> @@ -1946,57 +1910,23 @@ nir_ssa_dest_init(nir_instr *instr, nir_dest *dest,
> nir_ssa_def_init(instr, &dest->ssa, num_components, name);
> }
>
> -struct ssa_def_rewrite_state {
> - void *mem_ctx;
> - nir_ssa_def *old;
> - nir_src new_src;
> -};
> -
> -static bool
> -ssa_def_rewrite_uses_src(nir_src *src, void *void_state)
> -{
> - struct ssa_def_rewrite_state *state = void_state;
> -
> - if (src->is_ssa && src->ssa == state->old)
> - nir_src_copy(src, &state->new_src, state->mem_ctx);
> -
> - return true;
> -}
> -
> void
> nir_ssa_def_rewrite_uses(nir_ssa_def *def, nir_src new_src, void *mem_ctx)
> {
> - struct ssa_def_rewrite_state state;
> - state.mem_ctx = mem_ctx;
> - state.old = def;
> - state.new_src = new_src;
> -
> assert(!new_src.is_ssa || def != new_src.ssa);
>
> - struct set *new_uses, *new_if_uses;
> - if (new_src.is_ssa) {
> - new_uses = new_src.ssa->uses;
> - new_if_uses = new_src.ssa->if_uses;
> - } else {
> - new_uses = new_src.reg.reg->uses;
> - new_if_uses = new_src.reg.reg->if_uses;
> - }
> -
> - struct set_entry *entry;
> - set_foreach(def->uses, entry) {
> - nir_instr *instr = (nir_instr *)entry->key;
> -
> - _mesa_set_remove(def->uses, entry);
> - nir_foreach_src(instr, ssa_def_rewrite_uses_src, &state);
> - _mesa_set_add(new_uses, instr);
> + nir_list_foreach_safe(nir_src, use_src, use_link, &def->uses) {
> + nir_instr *src_parent_instr = use_src->parent_instr;
> + nir_link_remove(&use_src->use_link);
> + nir_src_copy(use_src, &new_src, mem_ctx);
> + src_add_all_uses(use_src, src_parent_instr, NULL);
> }
>
> - set_foreach(def->if_uses, entry) {
> - nir_if *if_use = (nir_if *)entry->key;
> -
> - _mesa_set_remove(def->if_uses, entry);
> - nir_src_copy(&if_use->condition, &new_src, mem_ctx);
> - _mesa_set_add(new_if_uses, if_use);
> + nir_list_foreach_safe(nir_src, use_src, use_link, &def->if_uses) {
> + nir_if *src_parent_if = use_src->parent_if;
> + nir_link_remove(&use_src->use_link);
> + nir_src_copy(use_src, &new_src, mem_ctx);
> + src_add_all_uses(use_src, NULL, src_parent_if);
> }
> }
>
> diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
> index aaf1c57..364071d 100644
> --- a/src/glsl/nir/nir.h
> +++ b/src/glsl/nir/nir.h
> @@ -37,6 +37,7 @@
> #include "glsl/shader_enums.h"
> #include <stdio.h>
>
> +#include "nir_list.h"
> #include "nir_opcodes.h"
>
> #ifdef __cplusplus
> @@ -397,13 +398,13 @@ typedef struct {
> struct nir_instr *parent_instr;
>
> /** set of nir_instr's where this register is used (read from) */
> - struct set *uses;
> + nir_list uses;
>
> /** set of nir_instr's where this register is defined (written to) */
> - struct set *defs;
> + nir_list defs;
>
> /** set of nir_if's where this register is used as a condition */
> - struct set *if_uses;
> + nir_list if_uses;
> } nir_register;
>
> typedef enum {
> @@ -462,10 +463,10 @@ typedef struct {
> nir_instr *parent_instr;
>
> /** set of nir_instr's where this register is used (read from) */
> - struct set *uses;
> + nir_list uses;
>
> /** set of nir_if's where this register is used as a condition */
> - struct set *if_uses;
> + nir_list if_uses;
>
> uint8_t num_components;
> } nir_ssa_def;
> @@ -481,6 +482,9 @@ typedef struct {
> } nir_reg_src;
>
> typedef struct {
> + nir_instr *parent_instr;
> + nir_link def_link;
> +
> nir_register *reg;
> struct nir_src *indirect; /** < NULL for no indirect offset */
> unsigned base_offset;
> @@ -488,8 +492,17 @@ typedef struct {
> /* TODO def-use chain goes here */
> } nir_reg_dest;
>
> +struct nir_if;
> +
> typedef struct nir_src {
> union {
> + nir_instr *parent_instr;
> + struct nir_if *parent_if;
> + };
There's something I'm not quite understanding about this... how are we
supposed to know which of parent_instr and parent_if are valid? If I
walk over all the sources for a given SSA def or register, how am I
supposed to know if it's part of an if-condition or an instruction? I
would think that you would need a boolean here or have parent_instr
and parent_if not be in a union.
> +
> + nir_link use_link;
> +
> + union {
> nir_reg_src reg;
> nir_ssa_def *ssa;
> };
> @@ -497,7 +510,7 @@ typedef struct nir_src {
> bool is_ssa;
> } nir_src;
>
> -#define NIR_SRC_INIT (nir_src) { { { NULL } } }
> +#define NIR_SRC_INIT (nir_src) { { NULL } }
>
> typedef struct {
> union {
> @@ -1208,7 +1221,7 @@ nir_block_last_instr(nir_block *block)
> #define nir_foreach_instr_safe(block, instr) \
> foreach_list_typed_safe(nir_instr, instr, node, &(block)->instr_list)
>
> -typedef struct {
> +typedef struct nir_if {
> nir_cf_node cf_node;
> nir_src condition;
>
> diff --git a/src/glsl/nir/nir_validate.c b/src/glsl/nir/nir_validate.c
> index 35a853d..97010f2 100644
> --- a/src/glsl/nir/nir_validate.c
> +++ b/src/glsl/nir/nir_validate.c
> @@ -97,50 +97,47 @@ typedef struct {
> static void validate_src(nir_src *src, validate_state *state);
>
> static void
> -validate_reg_src(nir_reg_src *src, validate_state *state)
> +validate_reg_src(nir_src *src, validate_state *state)
> {
> - assert(src->reg != NULL);
> + assert(src->reg.reg != NULL);
>
> struct hash_entry *entry;
> - entry = _mesa_hash_table_search(state->regs, src->reg);
> + entry = _mesa_hash_table_search(state->regs, src->reg.reg);
> assert(entry);
>
> reg_validate_state *reg_state = (reg_validate_state *) entry->data;
>
> if (state->instr) {
> - _mesa_set_add(reg_state->uses, state->instr);
> -
> - assert(_mesa_set_search(src->reg->uses, state->instr));
> + _mesa_set_add(reg_state->uses, src);
> } else {
> assert(state->if_stmt);
> - _mesa_set_add(reg_state->if_uses, state->if_stmt);
> -
> - assert(_mesa_set_search(src->reg->if_uses, state->if_stmt));
> + _mesa_set_add(reg_state->if_uses, src);
> }
>
> - if (!src->reg->is_global) {
> + if (!src->reg.reg->is_global) {
> assert(reg_state->where_defined == state->impl &&
> "using a register declared in a different function");
> }
>
> - assert((src->reg->num_array_elems == 0 ||
> - src->base_offset < src->reg->num_array_elems) &&
> + assert((src->reg.reg->num_array_elems == 0 ||
> + src->reg.base_offset < src->reg.reg->num_array_elems) &&
> "definitely out-of-bounds array access");
>
> - if (src->indirect) {
> - assert(src->reg->num_array_elems != 0);
> - assert((src->indirect->is_ssa || src->indirect->reg.indirect == NULL) &&
> + if (src->reg.indirect) {
> + assert(src->reg.reg->num_array_elems != 0);
> + assert((src->reg.indirect->is_ssa ||
> + src->reg.indirect->reg.indirect == NULL) &&
> "only one level of indirection allowed");
> - validate_src(src->indirect, state);
> + validate_src(src->reg.indirect, state);
> }
> }
>
> static void
> -validate_ssa_src(nir_ssa_def *def, validate_state *state)
> +validate_ssa_src(nir_src *src, validate_state *state)
> {
> - assert(def != NULL);
> + assert(src->ssa != NULL);
>
> - struct hash_entry *entry = _mesa_hash_table_search(state->ssa_defs, def);
> + struct hash_entry *entry = _mesa_hash_table_search(state->ssa_defs, src->ssa);
>
> assert(entry);
>
> @@ -150,14 +147,10 @@ validate_ssa_src(nir_ssa_def *def, validate_state *state)
> "using an SSA value defined in a different function");
>
> if (state->instr) {
> - _mesa_set_add(def_state->uses, state->instr);
> -
> - assert(_mesa_set_search(def->uses, state->instr));
> + _mesa_set_add(def_state->uses, src);
> } else {
> assert(state->if_stmt);
> - _mesa_set_add(def_state->if_uses, state->if_stmt);
> -
> - assert(_mesa_set_search(def->if_uses, state->if_stmt));
> + _mesa_set_add(def_state->if_uses, src);
> }
>
> /* TODO validate that the use is dominated by the definition */
> @@ -166,10 +159,15 @@ validate_ssa_src(nir_ssa_def *def, validate_state *state)
> static void
> validate_src(nir_src *src, validate_state *state)
> {
> + if (state->instr)
> + assert(src->parent_instr == state->instr);
> + else
> + assert(src->parent_if == state->if_stmt);
> +
> if (src->is_ssa)
> - validate_ssa_src(src->ssa, state);
> + validate_ssa_src(src, state);
> else
> - validate_reg_src(&src->reg, state);
> + validate_reg_src(src, state);
> }
>
> static void
> @@ -201,8 +199,7 @@ validate_reg_dest(nir_reg_dest *dest, validate_state *state)
> {
> assert(dest->reg != NULL);
>
> - struct set_entry *entry = _mesa_set_search(dest->reg->defs, state->instr);
> - assert(entry && "definition not in nir_register.defs");
> + assert(dest->parent_instr == state->instr);
>
> struct hash_entry *entry2;
> entry2 = _mesa_hash_table_search(state->regs, dest->reg);
> @@ -210,7 +207,7 @@ validate_reg_dest(nir_reg_dest *dest, validate_state *state)
> assert(entry2);
>
> reg_validate_state *reg_state = (reg_validate_state *) entry2->data;
> - _mesa_set_add(reg_state->defs, state->instr);
> + _mesa_set_add(reg_state->defs, dest);
>
> if (!dest->reg->is_global) {
> assert(reg_state->where_defined == state->impl &&
> @@ -240,6 +237,9 @@ validate_ssa_def(nir_ssa_def *def, validate_state *state)
>
> assert(def->num_components <= 4);
>
> + nir_list_validate(&def->uses);
> + nir_list_validate(&def->if_uses);
> +
> ssa_def_validate_state *def_state = ralloc(state->ssa_defs,
> ssa_def_validate_state);
> def_state->where_defined = state->impl;
> @@ -701,6 +701,10 @@ prevalidate_reg_decl(nir_register *reg, bool is_global, validate_state *state)
> assert(!BITSET_TEST(state->regs_found, reg->index));
> BITSET_SET(state->regs_found, reg->index);
>
> + nir_list_validate(®->uses);
> + nir_list_validate(®->defs);
> + nir_list_validate(®->if_uses);
> +
> reg_validate_state *reg_state = ralloc(state->regs, reg_validate_state);
> reg_state->uses = _mesa_set_create(reg_state, _mesa_hash_pointer,
> _mesa_key_pointer_equal);
> @@ -721,47 +725,47 @@ postvalidate_reg_decl(nir_register *reg, validate_state *state)
>
> reg_validate_state *reg_state = (reg_validate_state *) entry->data;
>
> - if (reg_state->uses->entries != reg->uses->entries) {
> + nir_list_foreach(nir_src, src, use_link, ®->uses) {
> + struct set_entry *entry = _mesa_set_search(reg_state->uses, src);
> + assert(entry);
> + _mesa_set_remove(reg_state->uses, entry);
> + }
> +
> + if (reg_state->uses->entries != 0) {
> printf("extra entries in register uses:\n");
> struct set_entry *entry;
> - set_foreach(reg->uses, entry) {
> - struct set_entry *entry2 =
> - _mesa_set_search(reg_state->uses, entry->key);
> -
> - if (entry2 == NULL) {
> - printf("%p\n", entry->key);
> - }
> - }
> + set_foreach(reg_state->uses, entry)
> + printf("%p\n", entry->key);
>
> abort();
> }
>
> - if (reg_state->if_uses->entries != reg->if_uses->entries) {
> + nir_list_foreach(nir_src, src, use_link, ®->if_uses) {
> + struct set_entry *entry = _mesa_set_search(reg_state->if_uses, src);
> + assert(entry);
> + _mesa_set_remove(reg_state->if_uses, entry);
> + }
> +
> + if (reg_state->if_uses->entries != 0) {
> printf("extra entries in register if_uses:\n");
> struct set_entry *entry;
> - set_foreach(reg->if_uses, entry) {
> - struct set_entry *entry2 =
> - _mesa_set_search(reg_state->if_uses, entry->key);
> -
> - if (entry2 == NULL) {
> - printf("%p\n", entry->key);
> - }
> - }
> + set_foreach(reg_state->if_uses, entry)
> + printf("%p\n", entry->key);
>
> abort();
> }
>
> - if (reg_state->defs->entries != reg->defs->entries) {
> + nir_list_foreach(nir_src, src, use_link, ®->defs) {
> + struct set_entry *entry = _mesa_set_search(reg_state->defs, src);
> + assert(entry);
> + _mesa_set_remove(reg_state->defs, entry);
> + }
> +
> + if (reg_state->defs->entries != 0) {
> printf("extra entries in register defs:\n");
> struct set_entry *entry;
> - set_foreach(reg->defs, entry) {
> - struct set_entry *entry2 =
> - _mesa_set_search(reg_state->defs, entry->key);
> -
> - if (entry2 == NULL) {
> - printf("%p\n", entry->key);
> - }
> - }
> + set_foreach(reg_state->defs, entry)
> + printf("%p\n", entry->key);
>
> abort();
> }
> @@ -790,32 +794,32 @@ postvalidate_ssa_def(nir_ssa_def *def, void *void_state)
> struct hash_entry *entry = _mesa_hash_table_search(state->ssa_defs, def);
> ssa_def_validate_state *def_state = (ssa_def_validate_state *)entry->data;
>
> - if (def_state->uses->entries != def->uses->entries) {
> - printf("extra entries in SSA def uses:\n");
> - struct set_entry *entry;
> - set_foreach(def->uses, entry) {
> - struct set_entry *entry2 =
> - _mesa_set_search(def_state->uses, entry->key);
> + nir_list_foreach(nir_src, src, use_link, &def->uses) {
> + struct set_entry *entry = _mesa_set_search(def_state->uses, src);
> + assert(entry);
> + _mesa_set_remove(def_state->uses, entry);
> + }
>
> - if (entry2 == NULL) {
> - printf("%p\n", entry->key);
> - }
> - }
> + if (def_state->uses->entries != 0) {
> + printf("extra entries in register uses:\n");
> + struct set_entry *entry;
> + set_foreach(def_state->uses, entry)
> + printf("%p\n", entry->key);
>
> abort();
> }
>
> - if (def_state->if_uses->entries != def->if_uses->entries) {
> - printf("extra entries in SSA def uses:\n");
> - struct set_entry *entry;
> - set_foreach(def->if_uses, entry) {
> - struct set_entry *entry2 =
> - _mesa_set_search(def_state->if_uses, entry->key);
> + nir_list_foreach(nir_src, src, use_link, &def->if_uses) {
> + struct set_entry *entry = _mesa_set_search(def_state->if_uses, src);
> + assert(entry);
> + _mesa_set_remove(def_state->if_uses, entry);
> + }
>
> - if (entry2 == NULL) {
> - printf("%p\n", entry->key);
> - }
> - }
> + if (def_state->if_uses->entries != 0) {
> + printf("extra entries in register uses:\n");
> + struct set_entry *entry;
> + set_foreach(def_state->if_uses, entry)
> + printf("%p\n", entry->key);
>
> abort();
> }
> --
> 2.3.6
>
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