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glsl: Update phi node management

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This commit is contained in:
ameerj 2021-05-25 20:55:06 -04:00
parent 67f881e714
commit b95716e543
4 changed files with 53 additions and 21 deletions
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24
src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
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@ -19,8 +19,15 @@ static void NotImplemented() {
throw NotImplementedException("GLSL instruction");
}
void EmitPhi(EmitContext& ctx, IR::Inst& inst) {
// NotImplemented();
void EmitPhi(EmitContext& ctx, IR::Inst& phi) {
const size_t num_args{phi.NumArgs()};
for (size_t i = 0; i < num_args; ++i) {
ctx.reg_alloc.Consume(phi.Arg(i));
}
if (!phi.Definition<Id>().is_valid) {
// The phi node wasn't forward defined
ctx.Add("{};", ctx.reg_alloc.Define(phi, phi.Arg(0).Type()));
}
}
void EmitVoid(EmitContext& ctx) {
@ -31,11 +38,18 @@ void EmitReference(EmitContext&) {
// NotImplemented();
}
void EmitPhiMove(EmitContext& ctx, const IR::Value& phi, const IR::Value& value) {
if (phi == value) {
void EmitPhiMove(EmitContext& ctx, const IR::Value& phi_value, const IR::Value& value) {
IR::Inst& phi{RegAlloc::AliasInst(*phi_value.Inst())};
if (!phi.Definition<Id>().is_valid) {
// The phi node wasn't forward defined
ctx.Add("{};", ctx.reg_alloc.Define(phi, phi.Arg(0).Type()));
}
const auto phi_reg{ctx.reg_alloc.Consume(IR::Value{&phi})};
const auto val_reg{ctx.reg_alloc.Consume(value)};
if (phi_reg == val_reg) {
return;
}
ctx.Add("{}={};", ctx.reg_alloc.Consume(phi), ctx.reg_alloc.Consume(value));
ctx.Add("{}={};", phi_reg, val_reg);
}
void EmitBranch(EmitContext& ctx, std::string_view label) {