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intel/compiler: Add scheduler deps for instructions that implicitly read g0

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Otherwise the scheduler can move the writes after the reads.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95009
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95012
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Tested-by: Mark Janes <mark.a.janes@intel.com>
Cc: Clayton A Craft <clayton.a.craft@intel.com>
Cc: mesa-stable@lists.freedesktop.org
(cherry picked from commit 0d5ce25c1c)
This commit is contained in:
Ian Romanick 2018-04-16 16:32:41 -07:00 • committed by Dylan Baker
parent 0ec061bbea
commit 3f1847459b
2 changed files with 28 additions and 0 deletions
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25
src/intel/compiler/brw_ir_vec4.h
View file

@ -334,6 +334,31 @@ public:
opcode != BRW_OPCODE_IF &&
opcode != BRW_OPCODE_WHILE));
}
bool reads_g0_implicitly() const
{
switch (opcode) {
case SHADER_OPCODE_TEX:
case SHADER_OPCODE_TXL:
case SHADER_OPCODE_TXD:
case SHADER_OPCODE_TXF:
case SHADER_OPCODE_TXF_CMS_W:
case SHADER_OPCODE_TXF_CMS:
case SHADER_OPCODE_TXF_MCS:
case SHADER_OPCODE_TXS:
case SHADER_OPCODE_TG4:
case SHADER_OPCODE_TG4_OFFSET:
case SHADER_OPCODE_SAMPLEINFO:
case VS_OPCODE_PULL_CONSTANT_LOAD:
case GS_OPCODE_SET_PRIMITIVE_ID:
case GS_OPCODE_GET_INSTANCE_ID:
case SHADER_OPCODE_GEN4_SCRATCH_READ:
case SHADER_OPCODE_GEN4_SCRATCH_WRITE:
return true;
default:
return false;
}
}
};
/**

3
src/intel/compiler/brw_schedule_instructions.cpp
View file

@ -1267,6 +1267,9 @@ vec4_instruction_scheduler::calculate_deps()
}
}
if (inst->reads_g0_implicitly())
add_dep(last_fixed_grf_write, n);
if (!inst->is_send_from_grf()) {
for (int i = 0; i < inst->mlen; i++) {
/* It looks like the MRF regs are released in the send