| /* |
| * Copyright © 2014 Connor Abbott |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "nir_instr_set.h" |
| #include "nir_vla.h" |
| #include "util/half_float.h" |
| |
| static bool |
| src_is_ssa(nir_src *src, void *data) |
| { |
| (void) data; |
| return src->is_ssa; |
| } |
| |
| static bool |
| dest_is_ssa(nir_dest *dest, void *data) |
| { |
| (void) data; |
| return dest->is_ssa; |
| } |
| |
| ASSERTED static inline bool |
| instr_each_src_and_dest_is_ssa(const nir_instr *instr) |
| { |
| if (!nir_foreach_dest((nir_instr *)instr, dest_is_ssa, NULL) || |
| !nir_foreach_src((nir_instr *)instr, src_is_ssa, NULL)) |
| return false; |
| |
| return true; |
| } |
| |
| /* This function determines if uses of an instruction can safely be rewritten |
| * to use another identical instruction instead. Note that this function must |
| * be kept in sync with hash_instr() and nir_instrs_equal() -- only |
| * instructions that pass this test will be handed on to those functions, and |
| * conversely they must handle everything that this function returns true for. |
| */ |
| static bool |
| instr_can_rewrite(const nir_instr *instr) |
| { |
| /* We only handle SSA. */ |
| assert(instr_each_src_and_dest_is_ssa(instr)); |
| |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| case nir_instr_type_deref: |
| case nir_instr_type_tex: |
| case nir_instr_type_load_const: |
| case nir_instr_type_phi: |
| return true; |
| case nir_instr_type_intrinsic: |
| return nir_intrinsic_can_reorder(nir_instr_as_intrinsic(instr)); |
| case nir_instr_type_call: |
| case nir_instr_type_jump: |
| case nir_instr_type_ssa_undef: |
| return false; |
| case nir_instr_type_parallel_copy: |
| default: |
| unreachable("Invalid instruction type"); |
| } |
| |
| return false; |
| } |
| |
| |
| #define HASH(hash, data) XXH32(&(data), sizeof(data), hash) |
| |
| static uint32_t |
| hash_src(uint32_t hash, const nir_src *src) |
| { |
| assert(src->is_ssa); |
| hash = HASH(hash, src->ssa); |
| return hash; |
| } |
| |
| static uint32_t |
| hash_alu_src(uint32_t hash, const nir_alu_src *src, unsigned num_components) |
| { |
| hash = HASH(hash, src->abs); |
| hash = HASH(hash, src->negate); |
| |
| for (unsigned i = 0; i < num_components; i++) |
| hash = HASH(hash, src->swizzle[i]); |
| |
| hash = hash_src(hash, &src->src); |
| return hash; |
| } |
| |
| static uint32_t |
| hash_alu(uint32_t hash, const nir_alu_instr *instr) |
| { |
| hash = HASH(hash, instr->op); |
| |
| /* We explicitly don't hash instr->exact. */ |
| uint8_t flags = instr->no_signed_wrap | |
| instr->no_unsigned_wrap << 1; |
| hash = HASH(hash, flags); |
| |
| hash = HASH(hash, instr->dest.dest.ssa.num_components); |
| hash = HASH(hash, instr->dest.dest.ssa.bit_size); |
| |
| if (nir_op_infos[instr->op].algebraic_properties & NIR_OP_IS_2SRC_COMMUTATIVE) { |
| assert(nir_op_infos[instr->op].num_inputs >= 2); |
| |
| uint32_t hash0 = hash_alu_src(hash, &instr->src[0], |
| nir_ssa_alu_instr_src_components(instr, 0)); |
| uint32_t hash1 = hash_alu_src(hash, &instr->src[1], |
| nir_ssa_alu_instr_src_components(instr, 1)); |
| /* For commutative operations, we need some commutative way of |
| * combining the hashes. One option would be to XOR them but that |
| * means that anything with two identical sources will hash to 0 and |
| * that's common enough we probably don't want the guaranteed |
| * collision. Either addition or multiplication will also work. |
| */ |
| hash = hash0 * hash1; |
| |
| for (unsigned i = 2; i < nir_op_infos[instr->op].num_inputs; i++) { |
| hash = hash_alu_src(hash, &instr->src[i], |
| nir_ssa_alu_instr_src_components(instr, i)); |
| } |
| } else { |
| for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) { |
| hash = hash_alu_src(hash, &instr->src[i], |
| nir_ssa_alu_instr_src_components(instr, i)); |
| } |
| } |
| |
| return hash; |
| } |
| |
| static uint32_t |
| hash_deref(uint32_t hash, const nir_deref_instr *instr) |
| { |
| hash = HASH(hash, instr->deref_type); |
| hash = HASH(hash, instr->mode); |
| hash = HASH(hash, instr->type); |
| |
| if (instr->deref_type == nir_deref_type_var) |
| return HASH(hash, instr->var); |
| |
| hash = hash_src(hash, &instr->parent); |
| |
| switch (instr->deref_type) { |
| case nir_deref_type_struct: |
| hash = HASH(hash, instr->strct.index); |
| break; |
| |
| case nir_deref_type_array: |
| case nir_deref_type_ptr_as_array: |
| hash = hash_src(hash, &instr->arr.index); |
| break; |
| |
| case nir_deref_type_cast: |
| hash = HASH(hash, instr->cast.ptr_stride); |
| hash = HASH(hash, instr->cast.align_mul); |
| hash = HASH(hash, instr->cast.align_offset); |
| break; |
| |
| case nir_deref_type_var: |
| case nir_deref_type_array_wildcard: |
| /* Nothing to do */ |
| break; |
| |
| default: |
| unreachable("Invalid instruction deref type"); |
| } |
| |
| return hash; |
| } |
| |
| static uint32_t |
| hash_load_const(uint32_t hash, const nir_load_const_instr *instr) |
| { |
| hash = HASH(hash, instr->def.num_components); |
| |
| if (instr->def.bit_size == 1) { |
| for (unsigned i = 0; i < instr->def.num_components; i++) { |
| uint8_t b = instr->value[i].b; |
| hash = HASH(hash, b); |
| } |
| } else { |
| unsigned size = instr->def.num_components * sizeof(*instr->value); |
| hash = XXH32(instr->value, size, hash); |
| } |
| |
| return hash; |
| } |
| |
| static int |
| cmp_phi_src(const void *data1, const void *data2) |
| { |
| nir_phi_src *src1 = *(nir_phi_src **)data1; |
| nir_phi_src *src2 = *(nir_phi_src **)data2; |
| return src1->pred - src2->pred; |
| } |
| |
| static uint32_t |
| hash_phi(uint32_t hash, const nir_phi_instr *instr) |
| { |
| hash = HASH(hash, instr->instr.block); |
| |
| /* sort sources by predecessor, since the order shouldn't matter */ |
| unsigned num_preds = instr->instr.block->predecessors->entries; |
| NIR_VLA(nir_phi_src *, srcs, num_preds); |
| unsigned i = 0; |
| nir_foreach_phi_src(src, instr) { |
| srcs[i++] = src; |
| } |
| |
| qsort(srcs, num_preds, sizeof(nir_phi_src *), cmp_phi_src); |
| |
| for (i = 0; i < num_preds; i++) { |
| hash = hash_src(hash, &srcs[i]->src); |
| hash = HASH(hash, srcs[i]->pred); |
| } |
| |
| return hash; |
| } |
| |
| static uint32_t |
| hash_intrinsic(uint32_t hash, const nir_intrinsic_instr *instr) |
| { |
| const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic]; |
| hash = HASH(hash, instr->intrinsic); |
| |
| if (info->has_dest) { |
| hash = HASH(hash, instr->dest.ssa.num_components); |
| hash = HASH(hash, instr->dest.ssa.bit_size); |
| } |
| |
| hash = XXH32(instr->const_index, info->num_indices * sizeof(instr->const_index[0]), hash); |
| return hash; |
| } |
| |
| static uint32_t |
| hash_tex(uint32_t hash, const nir_tex_instr *instr) |
| { |
| hash = HASH(hash, instr->op); |
| hash = HASH(hash, instr->num_srcs); |
| |
| for (unsigned i = 0; i < instr->num_srcs; i++) { |
| hash = HASH(hash, instr->src[i].src_type); |
| hash = hash_src(hash, &instr->src[i].src); |
| } |
| |
| hash = HASH(hash, instr->coord_components); |
| hash = HASH(hash, instr->sampler_dim); |
| hash = HASH(hash, instr->is_array); |
| hash = HASH(hash, instr->is_shadow); |
| hash = HASH(hash, instr->is_new_style_shadow); |
| unsigned component = instr->component; |
| hash = HASH(hash, component); |
| for (unsigned i = 0; i < 4; ++i) |
| for (unsigned j = 0; j < 2; ++j) |
| hash = HASH(hash, instr->tg4_offsets[i][j]); |
| hash = HASH(hash, instr->texture_index); |
| hash = HASH(hash, instr->sampler_index); |
| hash = HASH(hash, instr->texture_non_uniform); |
| hash = HASH(hash, instr->sampler_non_uniform); |
| |
| return hash; |
| } |
| |
| /* Computes a hash of an instruction for use in a hash table. Note that this |
| * will only work for instructions where instr_can_rewrite() returns true, and |
| * it should return identical hashes for two instructions that are the same |
| * according nir_instrs_equal(). |
| */ |
| |
| static uint32_t |
| hash_instr(const void *data) |
| { |
| const nir_instr *instr = data; |
| uint32_t hash = 0; |
| |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| hash = hash_alu(hash, nir_instr_as_alu(instr)); |
| break; |
| case nir_instr_type_deref: |
| hash = hash_deref(hash, nir_instr_as_deref(instr)); |
| break; |
| case nir_instr_type_load_const: |
| hash = hash_load_const(hash, nir_instr_as_load_const(instr)); |
| break; |
| case nir_instr_type_phi: |
| hash = hash_phi(hash, nir_instr_as_phi(instr)); |
| break; |
| case nir_instr_type_intrinsic: |
| hash = hash_intrinsic(hash, nir_instr_as_intrinsic(instr)); |
| break; |
| case nir_instr_type_tex: |
| hash = hash_tex(hash, nir_instr_as_tex(instr)); |
| break; |
| default: |
| unreachable("Invalid instruction type"); |
| } |
| |
| return hash; |
| } |
| |
| bool |
| nir_srcs_equal(nir_src src1, nir_src src2) |
| { |
| if (src1.is_ssa) { |
| if (src2.is_ssa) { |
| return src1.ssa == src2.ssa; |
| } else { |
| return false; |
| } |
| } else { |
| if (src2.is_ssa) { |
| return false; |
| } else { |
| if ((src1.reg.indirect == NULL) != (src2.reg.indirect == NULL)) |
| return false; |
| |
| if (src1.reg.indirect) { |
| if (!nir_srcs_equal(*src1.reg.indirect, *src2.reg.indirect)) |
| return false; |
| } |
| |
| return src1.reg.reg == src2.reg.reg && |
| src1.reg.base_offset == src2.reg.base_offset; |
| } |
| } |
| } |
| |
| /** |
| * If the \p s is an SSA value that was generated by a negation instruction, |
| * that instruction is returned as a \c nir_alu_instr. Otherwise \c NULL is |
| * returned. |
| */ |
| static nir_alu_instr * |
| get_neg_instr(nir_src 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; |
| } |
| |
| bool |
| nir_const_value_negative_equal(nir_const_value c1, |
| nir_const_value c2, |
| nir_alu_type full_type) |
| { |
| assert(nir_alu_type_get_base_type(full_type) != nir_type_invalid); |
| assert(nir_alu_type_get_type_size(full_type) != 0); |
| |
| switch (full_type) { |
| case nir_type_float16: |
| return _mesa_half_to_float(c1.u16) == -_mesa_half_to_float(c2.u16); |
| |
| case nir_type_float32: |
| return c1.f32 == -c2.f32; |
| |
| case nir_type_float64: |
| return c1.f64 == -c2.f64; |
| |
| case nir_type_int8: |
| case nir_type_uint8: |
| return c1.i8 == -c2.i8; |
| |
| case nir_type_int16: |
| case nir_type_uint16: |
| return c1.i16 == -c2.i16; |
| |
| case nir_type_int32: |
| case nir_type_uint32: |
| return c1.i32 == -c2.i32; |
| |
| case nir_type_int64: |
| case nir_type_uint64: |
| return c1.i64 == -c2.i64; |
| |
| default: |
| break; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Shallow compare of ALU srcs to determine if one is the negation of the other |
| * |
| * This function detects cases where \p alu1 is a constant and \p alu2 is a |
| * constant that is its negation. It will also detect cases where \p alu2 is |
| * an SSA value that is a \c nir_op_fneg applied to \p alu1 (and vice versa). |
| * |
| * This function does not detect the general case when \p alu1 and \p alu2 are |
| * SSA values that are the negations of each other (e.g., \p alu1 represents |
| * (a * b) and \p alu2 represents (-a * b)). |
| * |
| * \warning |
| * It is the responsibility of the caller to ensure that the component counts, |
| * write masks, and base types of the sources being compared are compatible. |
| */ |
| bool |
| nir_alu_srcs_negative_equal(const nir_alu_instr *alu1, |
| const nir_alu_instr *alu2, |
| unsigned src1, unsigned src2) |
| { |
| #ifndef NDEBUG |
| for (unsigned i = 0; i < NIR_MAX_VEC_COMPONENTS; i++) { |
| assert(nir_alu_instr_channel_used(alu1, src1, i) == |
| nir_alu_instr_channel_used(alu2, src2, i)); |
| } |
| |
| if (nir_op_infos[alu1->op].input_types[src1] == nir_type_float) { |
| assert(nir_op_infos[alu1->op].input_types[src1] == |
| nir_op_infos[alu2->op].input_types[src2]); |
| } else { |
| assert(nir_op_infos[alu1->op].input_types[src1] == nir_type_int); |
| assert(nir_op_infos[alu2->op].input_types[src2] == nir_type_int); |
| } |
| #endif |
| |
| if (alu1->src[src1].abs != alu2->src[src2].abs) |
| return false; |
| |
| bool parity = alu1->src[src1].negate != alu2->src[src2].negate; |
| |
| /* Handling load_const instructions is tricky. */ |
| |
| const nir_const_value *const const1 = |
| nir_src_as_const_value(alu1->src[src1].src); |
| |
| if (const1 != NULL) { |
| /* Assume that constant folding will eliminate source mods and unary |
| * ops. |
| */ |
| if (parity) |
| return false; |
| |
| const nir_const_value *const const2 = |
| nir_src_as_const_value(alu2->src[src2].src); |
| |
| if (const2 == NULL) |
| return false; |
| |
| if (nir_src_bit_size(alu1->src[src1].src) != |
| nir_src_bit_size(alu2->src[src2].src)) |
| return false; |
| |
| const nir_alu_type full_type = nir_op_infos[alu1->op].input_types[src1] | |
| nir_src_bit_size(alu1->src[src1].src); |
| for (unsigned i = 0; i < NIR_MAX_VEC_COMPONENTS; i++) { |
| if (nir_alu_instr_channel_used(alu1, src1, i) && |
| !nir_const_value_negative_equal(const1[alu1->src[src1].swizzle[i]], |
| const2[alu2->src[src2].swizzle[i]], |
| full_type)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| uint8_t alu1_swizzle[NIR_MAX_VEC_COMPONENTS] = {0}; |
| nir_src alu1_actual_src; |
| nir_alu_instr *neg1 = get_neg_instr(alu1->src[src1].src); |
| |
| if (neg1) { |
| parity = !parity; |
| alu1_actual_src = neg1->src[0].src; |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(neg1, 0); i++) |
| alu1_swizzle[i] = neg1->src[0].swizzle[i]; |
| } else { |
| alu1_actual_src = alu1->src[src1].src; |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(alu1, src1); i++) |
| alu1_swizzle[i] = i; |
| } |
| |
| uint8_t alu2_swizzle[NIR_MAX_VEC_COMPONENTS] = {0}; |
| nir_src alu2_actual_src; |
| nir_alu_instr *neg2 = get_neg_instr(alu2->src[src2].src); |
| |
| if (neg2) { |
| parity = !parity; |
| alu2_actual_src = neg2->src[0].src; |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(neg2, 0); i++) |
| alu2_swizzle[i] = neg2->src[0].swizzle[i]; |
| } else { |
| alu2_actual_src = alu2->src[src2].src; |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(alu2, src2); i++) |
| alu2_swizzle[i] = i; |
| } |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(alu1, src1); i++) { |
| if (alu1_swizzle[alu1->src[src1].swizzle[i]] != |
| alu2_swizzle[alu2->src[src2].swizzle[i]]) |
| return false; |
| } |
| |
| return parity && nir_srcs_equal(alu1_actual_src, alu2_actual_src); |
| } |
| |
| bool |
| nir_alu_srcs_equal(const nir_alu_instr *alu1, const nir_alu_instr *alu2, |
| unsigned src1, unsigned src2) |
| { |
| if (alu1->src[src1].abs != alu2->src[src2].abs || |
| alu1->src[src1].negate != alu2->src[src2].negate) |
| return false; |
| |
| for (unsigned i = 0; i < nir_ssa_alu_instr_src_components(alu1, src1); i++) { |
| if (alu1->src[src1].swizzle[i] != alu2->src[src2].swizzle[i]) |
| return false; |
| } |
| |
| return nir_srcs_equal(alu1->src[src1].src, alu2->src[src2].src); |
| } |
| |
| /* Returns "true" if two instructions are equal. Note that this will only |
| * work for the subset of instructions defined by instr_can_rewrite(). Also, |
| * it should only return "true" for instructions that hash_instr() will return |
| * the same hash for (ignoring collisions, of course). |
| */ |
| |
| bool |
| nir_instrs_equal(const nir_instr *instr1, const nir_instr *instr2) |
| { |
| assert(instr_can_rewrite(instr1) && instr_can_rewrite(instr2)); |
| |
| if (instr1->type != instr2->type) |
| return false; |
| |
| switch (instr1->type) { |
| case nir_instr_type_alu: { |
| nir_alu_instr *alu1 = nir_instr_as_alu(instr1); |
| nir_alu_instr *alu2 = nir_instr_as_alu(instr2); |
| |
| if (alu1->op != alu2->op) |
| return false; |
| |
| /* We explicitly don't compare instr->exact. */ |
| |
| if (alu1->no_signed_wrap != alu2->no_signed_wrap) |
| return false; |
| |
| if (alu1->no_unsigned_wrap != alu2->no_unsigned_wrap) |
| return false; |
| |
| /* TODO: We can probably acutally do something more inteligent such |
| * as allowing different numbers and taking a maximum or something |
| * here */ |
| if (alu1->dest.dest.ssa.num_components != alu2->dest.dest.ssa.num_components) |
| return false; |
| |
| if (alu1->dest.dest.ssa.bit_size != alu2->dest.dest.ssa.bit_size) |
| return false; |
| |
| if (nir_op_infos[alu1->op].algebraic_properties & NIR_OP_IS_2SRC_COMMUTATIVE) { |
| if ((!nir_alu_srcs_equal(alu1, alu2, 0, 0) || |
| !nir_alu_srcs_equal(alu1, alu2, 1, 1)) && |
| (!nir_alu_srcs_equal(alu1, alu2, 0, 1) || |
| !nir_alu_srcs_equal(alu1, alu2, 1, 0))) |
| return false; |
| |
| for (unsigned i = 2; i < nir_op_infos[alu1->op].num_inputs; i++) { |
| if (!nir_alu_srcs_equal(alu1, alu2, i, i)) |
| return false; |
| } |
| } else { |
| for (unsigned i = 0; i < nir_op_infos[alu1->op].num_inputs; i++) { |
| if (!nir_alu_srcs_equal(alu1, alu2, i, i)) |
| return false; |
| } |
| } |
| return true; |
| } |
| case nir_instr_type_deref: { |
| nir_deref_instr *deref1 = nir_instr_as_deref(instr1); |
| nir_deref_instr *deref2 = nir_instr_as_deref(instr2); |
| |
| if (deref1->deref_type != deref2->deref_type || |
| deref1->mode != deref2->mode || |
| deref1->type != deref2->type) |
| return false; |
| |
| if (deref1->deref_type == nir_deref_type_var) |
| return deref1->var == deref2->var; |
| |
| if (!nir_srcs_equal(deref1->parent, deref2->parent)) |
| return false; |
| |
| switch (deref1->deref_type) { |
| case nir_deref_type_struct: |
| if (deref1->strct.index != deref2->strct.index) |
| return false; |
| break; |
| |
| case nir_deref_type_array: |
| case nir_deref_type_ptr_as_array: |
| if (!nir_srcs_equal(deref1->arr.index, deref2->arr.index)) |
| return false; |
| break; |
| |
| case nir_deref_type_cast: |
| if (deref1->cast.ptr_stride != deref2->cast.ptr_stride || |
| deref1->cast.align_mul != deref2->cast.align_mul || |
| deref1->cast.align_offset != deref2->cast.align_offset) |
| return false; |
| break; |
| |
| case nir_deref_type_var: |
| case nir_deref_type_array_wildcard: |
| /* Nothing to do */ |
| break; |
| |
| default: |
| unreachable("Invalid instruction deref type"); |
| } |
| return true; |
| } |
| case nir_instr_type_tex: { |
| nir_tex_instr *tex1 = nir_instr_as_tex(instr1); |
| nir_tex_instr *tex2 = nir_instr_as_tex(instr2); |
| |
| if (tex1->op != tex2->op) |
| return false; |
| |
| if (tex1->num_srcs != tex2->num_srcs) |
| return false; |
| for (unsigned i = 0; i < tex1->num_srcs; i++) { |
| if (tex1->src[i].src_type != tex2->src[i].src_type || |
| !nir_srcs_equal(tex1->src[i].src, tex2->src[i].src)) { |
| return false; |
| } |
| } |
| |
| if (tex1->coord_components != tex2->coord_components || |
| tex1->sampler_dim != tex2->sampler_dim || |
| tex1->is_array != tex2->is_array || |
| tex1->is_shadow != tex2->is_shadow || |
| tex1->is_new_style_shadow != tex2->is_new_style_shadow || |
| tex1->component != tex2->component || |
| tex1->texture_index != tex2->texture_index || |
| tex1->sampler_index != tex2->sampler_index) { |
| return false; |
| } |
| |
| if (memcmp(tex1->tg4_offsets, tex2->tg4_offsets, |
| sizeof(tex1->tg4_offsets))) |
| return false; |
| |
| return true; |
| } |
| case nir_instr_type_load_const: { |
| nir_load_const_instr *load1 = nir_instr_as_load_const(instr1); |
| nir_load_const_instr *load2 = nir_instr_as_load_const(instr2); |
| |
| if (load1->def.num_components != load2->def.num_components) |
| return false; |
| |
| if (load1->def.bit_size != load2->def.bit_size) |
| return false; |
| |
| if (load1->def.bit_size == 1) { |
| for (unsigned i = 0; i < load1->def.num_components; ++i) { |
| if (load1->value[i].b != load2->value[i].b) |
| return false; |
| } |
| } else { |
| unsigned size = load1->def.num_components * sizeof(*load1->value); |
| if (memcmp(load1->value, load2->value, size) != 0) |
| return false; |
| } |
| return true; |
| } |
| case nir_instr_type_phi: { |
| nir_phi_instr *phi1 = nir_instr_as_phi(instr1); |
| nir_phi_instr *phi2 = nir_instr_as_phi(instr2); |
| |
| if (phi1->instr.block != phi2->instr.block) |
| return false; |
| |
| nir_foreach_phi_src(src1, phi1) { |
| nir_foreach_phi_src(src2, phi2) { |
| if (src1->pred == src2->pred) { |
| if (!nir_srcs_equal(src1->src, src2->src)) |
| return false; |
| |
| break; |
| } |
| } |
| } |
| |
| return true; |
| } |
| case nir_instr_type_intrinsic: { |
| nir_intrinsic_instr *intrinsic1 = nir_instr_as_intrinsic(instr1); |
| nir_intrinsic_instr *intrinsic2 = nir_instr_as_intrinsic(instr2); |
| const nir_intrinsic_info *info = |
| &nir_intrinsic_infos[intrinsic1->intrinsic]; |
| |
| if (intrinsic1->intrinsic != intrinsic2->intrinsic || |
| intrinsic1->num_components != intrinsic2->num_components) |
| return false; |
| |
| if (info->has_dest && intrinsic1->dest.ssa.num_components != |
| intrinsic2->dest.ssa.num_components) |
| return false; |
| |
| if (info->has_dest && intrinsic1->dest.ssa.bit_size != |
| intrinsic2->dest.ssa.bit_size) |
| return false; |
| |
| for (unsigned i = 0; i < info->num_srcs; i++) { |
| if (!nir_srcs_equal(intrinsic1->src[i], intrinsic2->src[i])) |
| return false; |
| } |
| |
| for (unsigned i = 0; i < info->num_indices; i++) { |
| if (intrinsic1->const_index[i] != intrinsic2->const_index[i]) |
| return false; |
| } |
| |
| return true; |
| } |
| case nir_instr_type_call: |
| case nir_instr_type_jump: |
| case nir_instr_type_ssa_undef: |
| case nir_instr_type_parallel_copy: |
| default: |
| unreachable("Invalid instruction type"); |
| } |
| |
| unreachable("All cases in the above switch should return"); |
| } |
| |
| static nir_ssa_def * |
| nir_instr_get_dest_ssa_def(nir_instr *instr) |
| { |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| assert(nir_instr_as_alu(instr)->dest.dest.is_ssa); |
| return &nir_instr_as_alu(instr)->dest.dest.ssa; |
| case nir_instr_type_deref: |
| assert(nir_instr_as_deref(instr)->dest.is_ssa); |
| return &nir_instr_as_deref(instr)->dest.ssa; |
| case nir_instr_type_load_const: |
| return &nir_instr_as_load_const(instr)->def; |
| case nir_instr_type_phi: |
| assert(nir_instr_as_phi(instr)->dest.is_ssa); |
| return &nir_instr_as_phi(instr)->dest.ssa; |
| case nir_instr_type_intrinsic: |
| assert(nir_instr_as_intrinsic(instr)->dest.is_ssa); |
| return &nir_instr_as_intrinsic(instr)->dest.ssa; |
| case nir_instr_type_tex: |
| assert(nir_instr_as_tex(instr)->dest.is_ssa); |
| return &nir_instr_as_tex(instr)->dest.ssa; |
| default: |
| unreachable("We never ask for any of these"); |
| } |
| } |
| |
| static bool |
| cmp_func(const void *data1, const void *data2) |
| { |
| return nir_instrs_equal(data1, data2); |
| } |
| |
| struct set * |
| nir_instr_set_create(void *mem_ctx) |
| { |
| return _mesa_set_create(mem_ctx, hash_instr, cmp_func); |
| } |
| |
| void |
| nir_instr_set_destroy(struct set *instr_set) |
| { |
| _mesa_set_destroy(instr_set, NULL); |
| } |
| |
| bool |
| nir_instr_set_add_or_rewrite(struct set *instr_set, nir_instr *instr) |
| { |
| if (!instr_can_rewrite(instr)) |
| return false; |
| |
| struct set_entry *e = _mesa_set_search_or_add(instr_set, instr); |
| nir_instr *match = (nir_instr *) e->key; |
| if (match != instr) { |
| nir_ssa_def *def = nir_instr_get_dest_ssa_def(instr); |
| nir_ssa_def *new_def = nir_instr_get_dest_ssa_def(match); |
| |
| /* It's safe to replace an exact instruction with an inexact one as |
| * long as we make it exact. If we got here, the two instructions are |
| * exactly identical in every other way so, once we've set the exact |
| * bit, they are the same. |
| */ |
| if (instr->type == nir_instr_type_alu && nir_instr_as_alu(instr)->exact) |
| nir_instr_as_alu(match)->exact = true; |
| |
| nir_ssa_def_rewrite_uses(def, nir_src_for_ssa(new_def)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void |
| nir_instr_set_remove(struct set *instr_set, nir_instr *instr) |
| { |
| if (!instr_can_rewrite(instr)) |
| return; |
| |
| struct set_entry *entry = _mesa_set_search(instr_set, instr); |
| if (entry) |
| _mesa_set_remove(instr_set, entry); |
| } |
| |
