Add support for lazily linking bitcode files (using a new
-mlink-bitcode-file flag), and more generally llvm::Modules, before
running optimisations.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143314 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/link-bitcode-file.c b/test/CodeGen/link-bitcode-file.c
new file mode 100644
index 0000000..7740406
--- /dev/null
+++ b/test/CodeGen/link-bitcode-file.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -triple i386-pc-linux-gnu -DBITCODE -emit-llvm-bc -o %t.bc %s
+// RUN: %clang_cc1 -triple i386-pc-linux-gnu -mlink-bitcode-file %t.bc -O3 -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-NO-BC %s
+// RUN: %clang_cc1 -triple i386-pc-linux-gnu -DBITCODE -mlink-bitcode-file %t.bc -O3 -emit-llvm -o - %s 2>&1 | FileCheck -check-prefix=CHECK-BC %s
+
+int f(void);
+
+#ifdef BITCODE
+
+// CHECK-BC: 'f': symbol multiply defined
+int f(void) {
+ return 42;
+}
+
+#else
+
+// CHECK-NO-BC: define i32 @g
+// CHECK-NO-BC: ret i32 42
+int g(void) {
+ return f();
+}
+
+// CHECK-NO-BC: define i32 @f
+
+#endif