On Mon, Jul 17, 2017 at 5:10 PM, Kenneth Graunke <kenn...@whitecape.org> wrote: > On Thursday, July 6, 2017 4:48:20 PM PDT Matt Turner wrote: >> i965 will want these to be scalar operations. >> --- >> src/compiler/Makefile.sources | 1 + >> src/compiler/nir/nir.h | 2 +- >> .../nir/nir_lower_read_invocation_to_scalar.c | 112 >> +++++++++++++++++++++ >> 3 files changed, 114 insertions(+), 1 deletion(-) >> create mode 100644 src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> >> diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources >> index b0f1c14b87..95f64f7a91 100644 >> --- a/src/compiler/Makefile.sources >> +++ b/src/compiler/Makefile.sources >> @@ -229,6 +229,7 @@ NIR_FILES = \ >> nir/nir_lower_passthrough_edgeflags.c \ >> nir/nir_lower_patch_vertices.c \ >> nir/nir_lower_phis_to_scalar.c \ >> + nir/nir_lower_read_invocation_to_scalar.c \ >> nir/nir_lower_regs_to_ssa.c \ >> nir/nir_lower_returns.c \ >> nir/nir_lower_samplers.c \ >> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h >> index 401c41f155..3591048574 100644 >> --- a/src/compiler/nir/nir.h >> +++ b/src/compiler/nir/nir.h >> @@ -2433,7 +2433,7 @@ bool nir_move_vec_src_uses_to_dest(nir_shader *shader); >> bool nir_lower_vec_to_movs(nir_shader *shader); >> bool nir_lower_alu_to_scalar(nir_shader *shader); >> bool nir_lower_load_const_to_scalar(nir_shader *shader); >> - >> +bool nir_lower_read_invocation_to_scalar(nir_shader *shader); >> bool nir_lower_phis_to_scalar(nir_shader *shader); >> void nir_lower_io_to_scalar(nir_shader *shader, nir_variable_mode mask); >> >> diff --git a/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> b/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> new file mode 100644 >> index 0000000000..edac7f5271 >> --- /dev/null >> +++ b/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> @@ -0,0 +1,112 @@ >> +/* >> + * Copyright © 2017 Intel Corporation >> + * >> + * 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.h" >> +#include "nir_builder.h" >> + >> +/** @file nir_lower_read_invocation_to_scalar.c >> + * >> + * Replaces >> nir_intrinsic_read_invocation/nir_intrinsic_read_first_invocation >> + * operations with num_components != 1 with individual per-channel >> operations. >> + */ >> + >> +static void >> +lower_read_invocation_to_scalar(nir_builder *b, nir_intrinsic_instr *intrin) >> +{ >> + b->cursor = nir_before_instr(&intrin->instr); >> + >> + nir_ssa_def *value = nir_ssa_for_src(b, intrin->src[0], >> intrin->num_components); >> + nir_ssa_def *reads[4]; >> + >> + for (unsigned i = 0; i < intrin->num_components; i++) { >> + nir_intrinsic_instr *chan_intrin = >> + nir_intrinsic_instr_create(b->shader, intrin->intrinsic); >> + nir_ssa_dest_init(&chan_intrin->instr, &chan_intrin->dest, >> + 1, intrin->dest.ssa.bit_size, NULL); >> + chan_intrin->num_components = 1; >> + >> + /* value */ >> + chan_intrin->src[0] = nir_src_for_ssa(nir_channel(b, value, i)); >> + /* invocation */ >> + if (intrin->intrinsic == nir_intrinsic_read_invocation) >> + chan_intrin->src[1] = intrin->src[1]; > > I don't think copying like this is legal. You need to use: > > nir_src_copy(&chan_intrin->src[1], &intrin->src[1], chan_intrin); > > otherwise you can get into trouble with ralloc contexts and indirects. >
On Mon, Jul 17, 2017 at 5:10 PM, Kenneth Graunke <kenn...@whitecape.org> wrote: > On Thursday, July 6, 2017 4:48:20 PM PDT Matt Turner wrote: >> i965 will want these to be scalar operations. >> --- >> src/compiler/Makefile.sources | 1 + >> src/compiler/nir/nir.h | 2 +- >> .../nir/nir_lower_read_invocation_to_scalar.c | 112 >> +++++++++++++++++++++ >> 3 files changed, 114 insertions(+), 1 deletion(-) >> create mode 100644 src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> >> diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources >> index b0f1c14b87..95f64f7a91 100644 >> --- a/src/compiler/Makefile.sources >> +++ b/src/compiler/Makefile.sources >> @@ -229,6 +229,7 @@ NIR_FILES = \ >> nir/nir_lower_passthrough_edgeflags.c \ >> nir/nir_lower_patch_vertices.c \ >> nir/nir_lower_phis_to_scalar.c \ >> + nir/nir_lower_read_invocation_to_scalar.c \ >> nir/nir_lower_regs_to_ssa.c \ >> nir/nir_lower_returns.c \ >> nir/nir_lower_samplers.c \ >> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h >> index 401c41f155..3591048574 100644 >> --- a/src/compiler/nir/nir.h >> +++ b/src/compiler/nir/nir.h >> @@ -2433,7 +2433,7 @@ bool nir_move_vec_src_uses_to_dest(nir_shader *shader); >> bool nir_lower_vec_to_movs(nir_shader *shader); >> bool nir_lower_alu_to_scalar(nir_shader *shader); >> bool nir_lower_load_const_to_scalar(nir_shader *shader); >> - >> +bool nir_lower_read_invocation_to_scalar(nir_shader *shader); >> bool nir_lower_phis_to_scalar(nir_shader *shader); >> void nir_lower_io_to_scalar(nir_shader *shader, nir_variable_mode mask); >> >> diff --git a/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> b/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> new file mode 100644 >> index 0000000000..edac7f5271 >> --- /dev/null >> +++ b/src/compiler/nir/nir_lower_read_invocation_to_scalar.c >> @@ -0,0 +1,112 @@ >> +/* >> + * Copyright © 2017 Intel Corporation >> + * >> + * 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.h" >> +#include "nir_builder.h" >> + >> +/** @file nir_lower_read_invocation_to_scalar.c >> + * >> + * Replaces >> nir_intrinsic_read_invocation/nir_intrinsic_read_first_invocation >> + * operations with num_components != 1 with individual per-channel >> operations. >> + */ >> + >> +static void >> +lower_read_invocation_to_scalar(nir_builder *b, nir_intrinsic_instr *intrin) >> +{ >> + b->cursor = nir_before_instr(&intrin->instr); >> + >> + nir_ssa_def *value = nir_ssa_for_src(b, intrin->src[0], >> intrin->num_components); >> + nir_ssa_def *reads[4]; >> + >> + for (unsigned i = 0; i < intrin->num_components; i++) { >> + nir_intrinsic_instr *chan_intrin = >> + nir_intrinsic_instr_create(b->shader, intrin->intrinsic); >> + nir_ssa_dest_init(&chan_intrin->instr, &chan_intrin->dest, >> + 1, intrin->dest.ssa.bit_size, NULL); >> + chan_intrin->num_components = 1; >> + >> + /* value */ >> + chan_intrin->src[0] = nir_src_for_ssa(nir_channel(b, value, i)); >> + /* invocation */ >> + if (intrin->intrinsic == nir_intrinsic_read_invocation) >> + chan_intrin->src[1] = intrin->src[1]; > > I don't think copying like this is legal. You need to use: > > nir_src_copy(&chan_intrin->src[1], &intrin->src[1], chan_intrin); > > otherwise you can get into trouble with ralloc contexts and indirects. Oh! I copied this structure from nir_lower_io_to_scalar.c Is it similarly broken there, or is there something different about that code that makes it safe? _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev