[PATCH] D85077: [clang][Tooling] Optimize addTargetAndMode in case of invalid modes

[Kadir Cetinkaya via Phabricator via cfe-commits]

kadircet created this revision.
kadircet added a reviewer: hokein.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.
kadircet requested review of this revision.

This skips searching for `target` related flags in the existing args if
we don't have a valid target to insert.

Depends on D85076 <https://reviews.llvm.org/D85076>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D85077

Files:
  clang/lib/Tooling/Tooling.cpp


Index: clang/lib/Tooling/Tooling.cpp
===================================================================
--- clang/lib/Tooling/Tooling.cpp
+++ clang/lib/Tooling/Tooling.cpp
@@ -258,7 +258,10 @@
   // --driver-mode=X
   const std::string DriverModeOPT =
       Table.getOption(driver::options::OPT_driver_mode).getPrefixedName();
-  bool AlreadyHasTarget = false;
+  auto TargetMode =
+      driver::ToolChain::getTargetAndModeFromProgramName(InvokedAs);
+  // No need to search for target args if we don't have a mode to insert.
+  bool AlreadyHasTarget = !TargetMode.TargetIsValid;
   bool AlreadyHasMode = false;
   // Skip CommandLine[0].
   for (auto Token = ++CommandLine.begin(); Token != CommandLine.end();
@@ -268,12 +271,10 @@
         TokenRef.startswith(TargetOPT) || TokenRef.equals(TargetOPTLegacy);
     AlreadyHasMode |= TokenRef.startswith(DriverModeOPT);
   }
-  auto TargetMode =
-      driver::ToolChain::getTargetAndModeFromProgramName(InvokedAs);
   if (!AlreadyHasMode && TargetMode.DriverMode) {
     CommandLine.insert(++CommandLine.begin(), TargetMode.DriverMode);
   }
-  if (!AlreadyHasTarget && TargetMode.TargetIsValid) {
+  if (!AlreadyHasTarget) {
     CommandLine.insert(++CommandLine.begin(),
                        TargetOPT + TargetMode.TargetPrefix);
   }


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