1 files changed, 37 insertions, 0 deletions
diff --git a/test/Driver/thinlto.c b/test/Driver/thinlto.c
new file mode 100644
index 000000000000..0369b78be0f5
--- /dev/null
+++ b/test/Driver/thinlto.c
@@ -0,0 +1,37 @@
+// -flto=thin causes a switch to llvm-bc object files.
+// RUN: %clang -ccc-print-phases -c %s -flto=thin 2> %t
+// RUN: FileCheck -check-prefix=CHECK-COMPILE-ACTIONS < %t %s
+//
+// CHECK-COMPILE-ACTIONS: 2: compiler, {1}, ir
+// CHECK-COMPILE-ACTIONS: 3: backend, {2}, lto-bc
+
+// RUN: %clang -ccc-print-phases %s -flto=thin 2> %t
+// RUN: FileCheck -check-prefix=CHECK-COMPILELINK-ACTIONS < %t %s
+//
+// CHECK-COMPILELINK-ACTIONS: 0: input, "{{.*}}thinlto.c", c
+// CHECK-COMPILELINK-ACTIONS: 1: preprocessor, {0}, cpp-output
+// CHECK-COMPILELINK-ACTIONS: 2: compiler, {1}, ir
+// CHECK-COMPILELINK-ACTIONS: 3: backend, {2}, lto-bc
+// CHECK-COMPILELINK-ACTIONS: 4: linker, {3}, image
+
+// -flto=thin should cause link using gold plugin with thinlto option,
+// also confirm that it takes precedence over earlier -fno-lto and -flto=full.
+// RUN: %clang -target x86_64-unknown-linux -### %s -flto=full -fno-lto -flto=thin 2> %t
+// RUN: FileCheck -check-prefix=CHECK-LINK-THIN-ACTION < %t %s
+//
+// CHECK-LINK-THIN-ACTION: "-plugin" "{{.*}}/LLVMgold.so"
+// CHECK-LINK-THIN-ACTION: "-plugin-opt=thinlto"
+
+// Check that subsequent -flto=full takes precedence
+// RUN: %clang -target x86_64-unknown-linux -### %s -flto=thin -flto=full 2> %t
+// RUN: FileCheck -check-prefix=CHECK-LINK-FULL-ACTION < %t %s
+//
+// CHECK-LINK-FULL-ACTION: "-plugin" "{{.*}}/LLVMgold.so"
+// CHECK-LINK-FULL-ACTION-NOT: "-plugin-opt=thinlto"
+
+// Check that subsequent -fno-lto takes precedence
+// RUN: %clang -target x86_64-unknown-linux -### %s -flto=thin -fno-lto 2> %t
+// RUN: FileCheck -check-prefix=CHECK-LINK-NOLTO-ACTION < %t %s
+//
+// CHECK-LINK-NOLTO-ACTION-NOT: "-plugin" "{{.*}}/LLVMgold.so"
+// CHECK-LINK-NOLTO-ACTION-NOT: "-plugin-opt=thinlto"