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glsl: Rework variable allocator to allow for variable reuse

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This commit is contained in:
ameerj
2021-05-30 17:27:00 -04:00
parent 9ccbd74991
commit 1269a0cf8b
14 changed files with 482 additions and 353 deletions
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10
src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
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@ -21,11 +21,11 @@ static void 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));
ctx.var_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()));
ctx.Add("{};", ctx.var_alloc.Define(phi, phi.Arg(0).Type()));
}
}
@ -42,10 +42,10 @@ void EmitPhiMove(EmitContext& ctx, const IR::Value& phi_value, const IR::Value&
const auto phi_type{phi.Arg(0).Type()};
if (!phi.Definition<Id>().is_valid) {
// The phi node wasn't forward defined
ctx.Add("{};", ctx.reg_alloc.Define(phi, phi_type));
ctx.Add("{};", ctx.var_alloc.Define(phi, phi_type));
}
const auto phi_reg{ctx.reg_alloc.Consume(IR::Value{&phi})};
const auto val_reg{ctx.reg_alloc.Consume(value)};
const auto phi_reg{ctx.var_alloc.Consume(IR::Value{&phi})};
const auto val_reg{ctx.var_alloc.Consume(value)};
if (phi_reg == val_reg) {
return;
}