From 3bf779de600544a668c0a3daeedf8e2fefbb9449 Mon Sep 17 00:00:00 2001
From: Petr Hosek <phosek@chromium.org>
Date: Thu, 16 Aug 2018 00:22:03 +0000
Subject: [PATCH] [Driver] -print-target-triple and -print-effective-triple
 options

These can be used to print Clang target and effective triple.

Differential Revision: https://reviews.llvm.org/D50755

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@339834 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Driver/Options.td      |  4 ++++
 lib/Driver/Driver.cpp                | 12 ++++++++++++
 test/Driver/print-effective-triple.c |  6 ++++++
 test/Driver/print-target-triple.c    |  6 ++++++
 4 files changed, 28 insertions(+)
 create mode 100644 test/Driver/print-effective-triple.c
 create mode 100644 test/Driver/print-target-triple.c

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 601aa87449..18781849bf 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -2348,6 +2348,10 @@ def print_multi_directory : Flag<["-", "--"], "print-multi-directory">;
 def print_multi_lib : Flag<["-", "--"], "print-multi-lib">;
 def print_multi_os_directory : Flag<["-", "--"], "print-multi-os-directory">,
   Flags<[Unsupported]>;
+def print_target_triple : Flag<["-", "--"], "print-target-triple">,
+  HelpText<"Print the normalized target triple">;
+def print_effective_triple : Flag<["-", "--"], "print-effective-triple">,
+  HelpText<"Print the effective target triple">;
 def print_prog_name_EQ : Joined<["-", "--"], "print-prog-name=">,
   HelpText<"Print the full program path of <name>">, MetaVarName<"<name>">;
 def print_resource_dir : Flag<["-", "--"], "print-resource-dir">,
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 952a716cb6..350ee0e39d 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -1672,6 +1672,18 @@ bool Driver::HandleImmediateArgs(const Compilation &C) {
     }
     return false;
   }
+
+  if (C.getArgs().hasArg(options::OPT_print_target_triple)) {
+    llvm::outs() << TC.getTripleString() << "\n";
+    return false;
+  }
+
+  if (C.getArgs().hasArg(options::OPT_print_effective_triple)) {
+    const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
+    llvm::outs() << Triple.getTriple() << "\n";
+    return false;
+  }
+
   return true;
 }
 
diff --git a/test/Driver/print-effective-triple.c b/test/Driver/print-effective-triple.c
new file mode 100644
index 0000000000..65b38748d6
--- /dev/null
+++ b/test/Driver/print-effective-triple.c
@@ -0,0 +1,6 @@
+// Test that -print-target-triple prints correct triple.
+
+// RUN: %clang -print-effective-triple 2>&1 \
+// RUN:     --target=thumb-linux-gnu \
+// RUN:   | FileCheck %s
+// CHECK: armv4t-unknown-linux-gnu
diff --git a/test/Driver/print-target-triple.c b/test/Driver/print-target-triple.c
new file mode 100644
index 0000000000..70b2493a6f
--- /dev/null
+++ b/test/Driver/print-target-triple.c
@@ -0,0 +1,6 @@
+// Test that -print-target-triple prints correct triple.
+
+// RUN: %clang -print-target-triple 2>&1 \
+// RUN:     --target=x86_64-linux-gnu \
+// RUN:   | FileCheck %s
+// CHECK: x86_64-unknown-linux-gnu
-- 
2.40.0