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rescaling_pass: Fix and simplify shuffle/fragcoord pass

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This commit is contained in:
ameerj
2021-09-17 21:31:29 -04:00
committed by Fernando Sahmkow
parent b3a9c8f108
commit edb5844240
1 changed files with 20 additions and 26 deletions
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46
src/shader_recompiler/ir_opt/rescaling_pass.cpp
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@@ -14,45 +14,39 @@
namespace Shader::Optimization {
namespace {
void VisitMark(const IR::Program& program, IR::Inst& inst) {
void VisitMark(const IR::Program& program, const IR::Inst& inst) {
const bool is_fragment_shader{program.stage == Stage::Fragment};
if (!is_fragment_shader) {
return;
}
switch (inst.GetOpcode()) {
case IR::Opcode::ShuffleIndex:
case IR::Opcode::ShuffleUp:
case IR::Opcode::ShuffleDown:
case IR::Opcode::ShuffleButterfly: {
const auto try_mark = [is_fragment_shader](IR::Inst* op) {
const IR::Attribute attr{op->Arg(0).Attribute()};
const IR::Value shfl_arg{inst.Arg(0)};
if (shfl_arg.IsImmediate()) {
break;
}
const IR::Inst* const arg_inst{shfl_arg.InstRecursive()};
if (arg_inst->GetOpcode() != IR::Opcode::BitCastU32F32) {
break;
}
const IR::Value bitcast_arg{arg_inst->Arg(0)};
if (bitcast_arg.IsImmediate()) {
break;
}
IR::Inst* const bitcast_inst{bitcast_arg.InstRecursive()};
if (bitcast_inst->GetOpcode() == IR::Opcode::GetAttribute) {
const IR::Attribute attr{bitcast_inst->Arg(0).Attribute()};
switch (attr) {
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
if (is_fragment_shader) {
op->SetFlags<u32>(0xDEADBEEF);
}
bitcast_inst->SetFlags<u32>(0xDEADBEEF);
break;
default:
break;
}
};
const IR::Value param_1{inst.Arg(0)};
if (param_1.IsImmediate()) {
break;
}
IR::Inst* op_a{param_1.InstRecursive()};
if (op_a->GetOpcode() == IR::Opcode::GetAttribute) {
try_mark(op_a);
break;
}
if (op_a->GetOpcode() != IR::Opcode::BitCastF32U32) {
break;
}
const IR::Value param_2{op_a->Arg(0)};
if (param_2.IsImmediate()) {
break;
}
IR::Inst* op_b{param_2.InstRecursive()};
if (op_b->GetOpcode() == IR::Opcode::GetAttribute) {
try_mark(op_b);
}
break;
}