Allow redefinitions of extern inline functions in GNU89 mode, just as GCC
does. Fixes PR5253.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96553 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/extern-inline.c b/test/CodeGen/extern-inline.c
new file mode 100644
index 0000000..5dd9bfd
--- /dev/null
+++ b/test/CodeGen/extern-inline.c
@@ -0,0 +1,25 @@
+// RUN: %clang -S -emit-llvm -std=gnu89 -o - %s | FileCheck %s
+// PR5253
+
+// If an extern inline function is redefined, functions should call the
+// redefinition.
+extern inline int f(int a) {return a;}
+int g(void) {return f(0);}
+// CHECK: call i32 @f
+int f(int b) {return 1+b;}
+// CHECK: load i32* %{{.*}}
+// CHECK: add nsw i32 1, %{{.*}}
+int h(void) {return f(1);}
+// CHECK: call i32 @f
+
+// It shouldn't matter if the function was redefined static.
+extern inline int f2(int a, int b) {return a+b;}
+int g2(void) {return f2(0,1);}
+// CHECK: call i32 @f2
+static int f2(int a, int b) {return a*b;}
+// CHECK: load i32* %{{.*}}
+// CHECK: load i32* %{{.*}}
+// CHECK: mul i32 %{{.*}}, %{{.*}}
+int h2(void) {return f2(1,2);}
+// CHECK: call i32 @f2
+