From 175fdbf4b30eae5e5344cd7fca7e953ca0b2463e Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Thu, 13 Aug 2026 13:29:50 +0800
Subject: [Tooling] Remove the duplicate output kind

---
 backend/lib/Tooling/PipelineDriver.cpp | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

(limited to 'backend/lib/Tooling/PipelineDriver.cpp')

diff --git a/backend/lib/Tooling/PipelineDriver.cpp b/backend/lib/Tooling/PipelineDriver.cpp
index 68cbb57..1a584f7 100644
--- a/backend/lib/Tooling/PipelineDriver.cpp
+++ b/backend/lib/Tooling/PipelineDriver.cpp
@@ -34,8 +34,24 @@ struct FunctionRunResult final {
   std::optional<Error> Failure;
 };
 
-[[nodiscard]] unsigned stageOrdinal(BackendStage Stage) noexcept {
-  return static_cast<unsigned>(Stage);
+[[nodiscard]] std::uint8_t stageRank(BackendStage Stage) noexcept {
+  switch (Stage) {
+  case BackendStage::PreLegalizerMIR:
+    return 0;
+  case BackendStage::LegalizedMIR:
+    return 1;
+  case BackendStage::RegisterBankMIR:
+    return 2;
+  case BackendStage::SelectedMIR:
+    return 3;
+  case BackendStage::PostSSAMIR:
+    return 4;
+  case BackendStage::PostRegisterAllocationMIR:
+    return 5;
+  case BackendStage::FinalMIR:
+    return 6;
+  }
+  return 0;
 }
 
 [[nodiscard]] bool selectorMatches(std::string_view Selector, std::string_view Pass,
@@ -224,7 +240,7 @@ runFunction(MachineFunction &Function, mir::MIRDocument &Document, const TargetD
     if (!Captured)
       return std::unexpected(Captured.error());
   }
-  if (Controls.StopAtStage && stageOrdinal(CurrentStage) >= stageOrdinal(*Controls.StopAtStage)) {
+  if (Controls.StopAtStage && !isEarlierStage(CurrentStage, *Controls.StopAtStage)) {
     return Result;
   }
 
@@ -289,7 +305,7 @@ runFunction(MachineFunction &Function, mir::MIRDocument &Document, const TargetD
       StopMatched = true;
       break;
     }
-    if (Controls.StopAtStage && stageOrdinal(CurrentStage) >= stageOrdinal(*Controls.StopAtStage)) {
+    if (Controls.StopAtStage && !isEarlierStage(CurrentStage, *Controls.StopAtStage)) {
       break;
     }
   }
@@ -314,6 +330,10 @@ runFunction(MachineFunction &Function, mir::MIRDocument &Document, const TargetD
 
 } // namespace
 
+bool isEarlierStage(BackendStage Left, BackendStage Right) noexcept {
+  return stageRank(Left) < stageRank(Right);
+}
+
 BackendStage stageForFunction(const MachineFunction &Function) noexcept {
   const MachineFunctionProperties &Properties = Function.properties();
   if (Properties.has(MachineFunctionProperty::Selected) &&
-- 
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