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authorReinUsesLisp <reinuseslisp@airmail.cc>2021-05-18 00:24:09 +0200
committerameerj <52414509+ameerj@users.noreply.github.com>2021-07-23 03:51:31 +0200
commitfb3ba62b3a47ad645b007d5031ed9f8aaa7cb5c0 (patch)
treea646ef0f5b2fde47b18f00231157282323c46bf0 /src/shader_recompiler/backend
parentglasm: Remove unintentional comma on vector insert (diff)
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Diffstat (limited to 'src/shader_recompiler/backend')
-rw-r--r--src/shader_recompiler/backend/glasm/emit_glasm_bitwise_conversion.cpp10
-rw-r--r--src/shader_recompiler/backend/glasm/reg_alloc.cpp39
-rw-r--r--src/shader_recompiler/backend/glasm/reg_alloc.h6
3 files changed, 42 insertions, 13 deletions
diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_bitwise_conversion.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_bitwise_conversion.cpp
index a6c66b826..cdbf6e93e 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_bitwise_conversion.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_bitwise_conversion.cpp
@@ -12,12 +12,10 @@ static void Alias(IR::Inst& inst, const IR::Value& value) {
if (value.IsImmediate()) {
return;
}
- IR::Inst* const value_inst{value.InstRecursive()};
- if (inst.GetOpcode() == IR::Opcode::Identity) {
- value_inst->DestructiveAddUsage(inst.UseCount());
- value_inst->DestructiveRemoveUsage();
- }
- inst.SetDefinition(value_inst->Definition<Id>());
+ IR::Inst& value_inst{RegAlloc::AliasInst(*value.Inst())};
+ value_inst.DestructiveAddUsage(inst.UseCount());
+ value_inst.DestructiveRemoveUsage();
+ inst.SetDefinition(value_inst.Definition<Id>());
}
void EmitIdentity(EmitContext&, IR::Inst& inst, const IR::Value& value) {
diff --git a/src/shader_recompiler/backend/glasm/reg_alloc.cpp b/src/shader_recompiler/backend/glasm/reg_alloc.cpp
index 0e38f467f..707b22247 100644
--- a/src/shader_recompiler/backend/glasm/reg_alloc.cpp
+++ b/src/shader_recompiler/backend/glasm/reg_alloc.cpp
@@ -30,9 +30,10 @@ Value RegAlloc::Consume(const IR::Value& value) {
}
void RegAlloc::Unref(IR::Inst& inst) {
- inst.DestructiveRemoveUsage();
- if (!inst.HasUses()) {
- Free(inst.Definition<Id>());
+ IR::Inst& value_inst{AliasInst(inst)};
+ value_inst.DestructiveRemoveUsage();
+ if (!value_inst.HasUses()) {
+ Free(value_inst.Definition<Id>());
}
}
@@ -99,10 +100,7 @@ Value RegAlloc::PeekInst(IR::Inst& inst) {
}
Value RegAlloc::ConsumeInst(IR::Inst& inst) {
- inst.DestructiveRemoveUsage();
- if (!inst.HasUses()) {
- Free(inst.Definition<Id>());
- }
+ Unref(inst);
return PeekInst(inst);
}
@@ -138,4 +136,31 @@ void RegAlloc::Free(Id id) {
}
}
+/*static*/ bool RegAlloc::IsAliased(const IR::Inst& inst) {
+ switch (inst.GetOpcode()) {
+ case IR::Opcode::Identity:
+ case IR::Opcode::BitCastU16F16:
+ case IR::Opcode::BitCastU32F32:
+ case IR::Opcode::BitCastU64F64:
+ case IR::Opcode::BitCastF16U16:
+ case IR::Opcode::BitCastF32U32:
+ case IR::Opcode::BitCastF64U64:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/*static*/ IR::Inst& RegAlloc::AliasInst(IR::Inst& inst) {
+ IR::Inst* it{&inst};
+ while (IsAliased(*it)) {
+ const IR::Value arg{it->Arg(0)};
+ if (arg.IsImmediate()) {
+ break;
+ }
+ it = arg.InstRecursive();
+ }
+ return *it;
+}
+
} // namespace Shader::Backend::GLASM
diff --git a/src/shader_recompiler/backend/glasm/reg_alloc.h b/src/shader_recompiler/backend/glasm/reg_alloc.h
index ede6edd1f..41b7c92be 100644
--- a/src/shader_recompiler/backend/glasm/reg_alloc.h
+++ b/src/shader_recompiler/backend/glasm/reg_alloc.h
@@ -126,6 +126,12 @@ public:
return num_used_long_registers;
}
+ /// Returns true if the instruction is expected to be aliased to another
+ static bool IsAliased(const IR::Inst& inst);
+
+ /// Returns the underlying value out of an alias sequence
+ static IR::Inst& AliasInst(IR::Inst& inst);
+
private:
static constexpr size_t NUM_REGS = 4096;
static constexpr size_t NUM_ELEMENTS = 4;