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intel/compiler: don't instantiate a builder for each instruction

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Don't instantiate a builder for each instruction during
lower_integer_multiplication(). Instantiate one only when needed.

On the other hand, these unneeded builders don't seem to cost much to
init, so I don't expect any significant difference in performance:
this is mostly about code organization.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
This commit is contained in:
Paulo Zanoni
2019-07-10 16:48:01 -07:00
committed by Caio Marcelo de Oliveira Filho
parent 75b3868dcc
commit 6ba4717924
2 changed files with 10 additions and 12 deletions
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16
src/intel/compiler/brw_fs.cpp
View File

@@ -3863,9 +3863,10 @@ fs_visitor::lower_load_payload()
}
void
fs_visitor::lower_mul_dword_inst(fs_inst *inst, bblock_t *block,
const fs_builder &ibld)
fs_visitor::lower_mul_dword_inst(fs_inst *inst, bblock_t *block)
{
const fs_builder ibld(this, block, inst);
if (inst->src[1].file == IMM && inst->src[1].ud < (1 << 16)) {
/* The MUL instruction isn't commutative. On Gen <= 6, only the low
* 16-bits of src0 are read, and on Gen >= 7 only the low 16-bits of
@@ -3990,9 +3991,10 @@ fs_visitor::lower_mul_dword_inst(fs_inst *inst, bblock_t *block,
}
void
fs_visitor::lower_mulh_inst(fs_inst *inst, bblock_t *block,
const fs_builder &ibld)
fs_visitor::lower_mulh_inst(fs_inst *inst, bblock_t *block)
{
const fs_builder ibld(this, block, inst);
/* According to the BDW+ BSpec page for the "Multiply Accumulate
* High" instruction:
*
@@ -4059,8 +4061,6 @@ fs_visitor::lower_integer_multiplication()
bool progress = false;
foreach_block_and_inst_safe(block, fs_inst, inst, cfg) {
const fs_builder ibld(this, block, inst);
if (inst->opcode == BRW_OPCODE_MUL) {
if (inst->dst.is_accumulator() ||
(inst->dst.type != BRW_REGISTER_TYPE_D &&
@@ -4070,9 +4070,9 @@ fs_visitor::lower_integer_multiplication()
if (devinfo->has_integer_dword_mul)
continue;
lower_mul_dword_inst(inst, block, ibld);
lower_mul_dword_inst(inst, block);
} else if (inst->opcode == SHADER_OPCODE_MULH) {
lower_mulh_inst(inst, block, ibld);
lower_mulh_inst(inst, block);
} else {
continue;
}

6
src/intel/compiler/brw_fs.h
View File

@@ -406,10 +406,8 @@ private:
void resolve_inot_sources(const brw::fs_builder &bld, nir_alu_instr *instr,
fs_reg *op);
void lower_mul_dword_inst(fs_inst *inst, bblock_t *block,
const brw::fs_builder &ibld);
void lower_mulh_inst(fs_inst *inst, bblock_t *block,
const brw::fs_builder &ibld);
void lower_mul_dword_inst(fs_inst *inst, bblock_t *block);
void lower_mulh_inst(fs_inst *inst, bblock_t *block);
};
/**