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shader: Fold interpolation multiplications

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ReinUsesLisp 2021-03-21 21:56:27 -03:00 committed by ameerj
parent 96b7ced6ec
commit 2be5c7eff4
1 changed files with 34 additions and 0 deletions
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34
src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
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@ -236,6 +236,38 @@ void FoldSelect(IR::Inst& inst) {
}
}
void FoldFPMul32(IR::Inst& inst) {
const auto control{inst.Flags<IR::FpControl>()};
if (control.no_contraction) {
return;
}
// Fold interpolation operations
const IR::Value lhs_value{inst.Arg(0)};
const IR::Value rhs_value{inst.Arg(1)};
if (lhs_value.IsImmediate() || rhs_value.IsImmediate()) {
return;
}
IR::Inst* const lhs_op{lhs_value.InstRecursive()};
IR::Inst* const rhs_op{rhs_value.InstRecursive()};
if (lhs_op->Opcode() != IR::Opcode::FPMul32 || rhs_op->Opcode() != IR::Opcode::FPRecip32) {
return;
}
const IR::Value recip_source{rhs_op->Arg(0)};
const IR::Value lhs_mul_source{lhs_op->Arg(1).Resolve()};
if (recip_source.IsImmediate() || lhs_mul_source.IsImmediate()) {
return;
}
IR::Inst* const attr_a{recip_source.InstRecursive()};
IR::Inst* const attr_b{lhs_mul_source.InstRecursive()};
if (attr_a->Opcode() != IR::Opcode::GetAttribute ||
attr_b->Opcode() != IR::Opcode::GetAttribute) {
return;
}
if (attr_a->Arg(0).Attribute() == attr_b->Arg(0).Attribute()) {
inst.ReplaceUsesWith(lhs_op->Arg(0));
}
}
void FoldLogicalAnd(IR::Inst& inst) {
if (!FoldCommutative<bool>(inst, [](bool a, bool b) { return a && b; })) {
return;
@ -348,6 +380,8 @@ void ConstantPropagation(IR::Block& block, IR::Inst& inst) {
case IR::Opcode::SelectF32:
case IR::Opcode::SelectF64:
return FoldSelect(inst);
case IR::Opcode::FPMul32:
return FoldFPMul32(inst);
case IR::Opcode::LogicalAnd:
return FoldLogicalAnd(inst);
case IR::Opcode::LogicalOr: