intel/fs: Remove existing lower_conversions pass.

It's redundant with the functionality provided by lower_regioning now.

Reviewed-by: Iago Toral Quiroga <[email protected]>

4 files changed, 1 insertions, 138 deletions

diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index edcb0ce79f4..cfc1a470886 100644
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -6478,10 +6478,7 @@ fs_visitor::optimize()
       OPT(dead_code_eliminate);
    }
 
-   progress = false;
-   OPT(lower_conversions);
-   OPT(lower_regioning);
-   if (progress) {
+   if (OPT(lower_regioning)) {
       OPT(opt_copy_propagation);
       OPT(dead_code_eliminate);
       OPT(lower_simd_width);
diff --git a/src/intel/compiler/brw_fs.h b/src/intel/compiler/brw_fs.h
index 36825754931..7edaa3af43c 100644
--- a/src/intel/compiler/brw_fs.h
+++ b/src/intel/compiler/brw_fs.h
@@ -165,7 +165,6 @@ public:
    bool lower_load_payload();
    bool lower_pack();
    bool lower_regioning();
-   bool lower_conversions();
    bool lower_logical_sends();
    bool lower_integer_multiplication();
    bool lower_minmax();
diff --git a/src/intel/compiler/brw_fs_lower_conversions.cpp b/src/intel/compiler/brw_fs_lower_conversions.cpp
deleted file mode 100644
index 145fb55f995..00000000000
--- a/src/intel/compiler/brw_fs_lower_conversions.cpp
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Copyright © 2015 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 "brw_fs.h"
-#include "brw_cfg.h"
-#include "brw_fs_builder.h"
-
-using namespace brw;
-
-static bool
-supports_type_conversion(const fs_inst *inst) {
-   switch (inst->opcode) {
-   case BRW_OPCODE_MOV:
-   case SHADER_OPCODE_MOV_INDIRECT:
-      return true;
-   case BRW_OPCODE_SEL:
-      return inst->dst.type == get_exec_type(inst);
-   default:
-      /* FIXME: We assume the opcodes don't explicitly mentioned
-       * before just work fine with arbitrary conversions.
-       */
-      return true;
-   }
-}
-
-/* From the SKL PRM Vol 2a, "Move":
- *
- *    "A mov with the same source and destination type, no source modifier,
- *     and no saturation is a raw move. A packed byte destination region (B
- *     or UB type with HorzStride == 1 and ExecSize > 1) can only be written
- *     using raw move."
- */
-static bool
-is_byte_raw_mov (const fs_inst *inst)
-{
-   return type_sz(inst->dst.type) == 1 &&
-          inst->opcode == BRW_OPCODE_MOV &&
-          inst->src[0].type == inst->dst.type &&
-          !inst->saturate &&
-          !inst->src[0].negate &&
-          !inst->src[0].abs;
-}
-
-bool
-fs_visitor::lower_conversions()
-{
-   bool progress = false;
-
-   foreach_block_and_inst(block, fs_inst, inst, cfg) {
-      const fs_builder ibld(this, block, inst);
-      fs_reg dst = inst->dst;
-      bool saturate = inst->saturate;
-
-      if (supports_type_conversion(inst)) {
-         if (type_sz(inst->dst.type) < get_exec_type_size(inst) &&
-             !is_byte_raw_mov(inst)) {
-            /* From the Broadwell PRM, 3D Media GPGPU, "Double Precision Float to
-             * Single Precision Float":
-             *
-             *    The upper Dword of every Qword will be written with undefined
-             *    value when converting DF to F.
-             *
-             * So we need to allocate a temporary that's two registers, and then do
-             * a strided MOV to get the lower DWord of every Qword that has the
-             * result.
-             *
-             * This restriction applies, in general, whenever we convert to
-             * a type with a smaller bit-size.
-             */
-            fs_reg temp = ibld.vgrf(get_exec_type(inst));
-            fs_reg strided_temp = subscript(temp, dst.type, 0);
-
-            assert(inst->size_written == inst->dst.component_size(inst->exec_size));
-            inst->dst = strided_temp;
-            inst->saturate = false;
-            /* As it is an strided destination, we write n-times more being n the
-             * size ratio between source and destination types. Update
-             * size_written accordingly.
-             */
-            inst->size_written = inst->dst.component_size(inst->exec_size);
-
-            fs_inst *mov = ibld.at(block, inst->next).MOV(dst, strided_temp);
-            mov->saturate = saturate;
-            mov->predicate = inst->predicate;
-
-            progress = true;
-         }
-      } else {
-         fs_reg temp0 = ibld.vgrf(get_exec_type(inst));
-
-         assert(inst->size_written == inst->dst.component_size(inst->exec_size));
-         inst->dst = temp0;
-         /* As it is an strided destination, we write n-times more being n the
-          * size ratio between source and destination types. Update
-          * size_written accordingly.
-          */
-         inst->size_written = inst->dst.component_size(inst->exec_size);
-         inst->saturate = false;
-         /* Now, do the conversion to original destination's type. In next iteration,
-          * we will lower it if it is a d2f conversion.
-          */
-         ibld.at(block, inst->next).MOV(dst, temp0)->saturate = saturate;
-
-         progress = true;
-      }
-   }
-
-   if (progress)
-      invalidate_live_intervals();
-
-   return progress;
-}
diff --git a/src/intel/compiler/meson.build b/src/intel/compiler/meson.build
index 4af134b418e..f8e5e2518fe 100644
--- a/src/intel/compiler/meson.build
+++ b/src/intel/compiler/meson.build
@@ -55,7 +55,6 @@ libintel_compiler_files = files(
   'brw_fs.h',
   'brw_fs_live_variables.cpp',
   'brw_fs_live_variables.h',
-  'brw_fs_lower_conversions.cpp',
   'brw_fs_lower_pack.cpp',
   'brw_fs_lower_regioning.cpp',
   'brw_fs_nir.cpp',