1 files changed, 47 insertions, 0 deletions
diff --git a/test/Misc/reduced-diags-macros-backtrace.cpp b/test/Misc/reduced-diags-macros-backtrace.cpp
new file mode 100644
index 000000000000..70c4122a1eda
--- /dev/null
+++ b/test/Misc/reduced-diags-macros-backtrace.cpp
@@ -0,0 +1,47 @@
+// RUN: not %clang_cc1 -fsyntax-only -fmacro-backtrace-limit 0 %s 2>&1 | FileCheck %s --check-prefix=ALL
+// RUN: not %clang_cc1 -fsyntax-only -fmacro-backtrace-limit 2 %s 2>&1 | FileCheck %s --check-prefix=SKIP
+
+#define F(x) x + 1
+#define G(x) F(x) + 2
+#define ADD(x,y) G(x) + y
+#define LEVEL4(x) ADD(p,x)
+#define LEVEL3(x) LEVEL4(x)
+#define LEVEL2(x) LEVEL3(x)
+#define LEVEL1(x) LEVEL2(x)
+
+int a = LEVEL1(b);
+
+// ALL: {{.*}}:12:9: error: use of undeclared identifier 'p'
+// ALL-NEXT: int a = LEVEL1(b);
+// ALL-NEXT:         ^
+// ALL-NEXT: {{.*}}:10:19: note: expanded from macro 'LEVEL1'
+// ALL-NEXT: #define LEVEL1(x) LEVEL2(x)
+// ALL-NEXT:                   ^
+// ALL-NEXT: {{.*}}:9:19: note: expanded from macro 'LEVEL2'
+// ALL-NEXT: #define LEVEL2(x) LEVEL3(x)
+// ALL-NEXT:                   ^
+// ALL-NEXT: {{.*}}:8:19: note: expanded from macro 'LEVEL3'
+// ALL-NEXT: #define LEVEL3(x) LEVEL4(x)
+// ALL-NEXT:                   ^
+// ALL-NEXT: {{.*}}:7:23: note: expanded from macro 'LEVEL4'
+// ALL-NEXT: #define LEVEL4(x) ADD(p,x)
+// ALL-NEXT:                       ^
+// ALL-NEXT: {{.*}}:12:16: error: use of undeclared identifier 'b'
+// ALL-NEXT: int a = LEVEL1(b);
+// ALL-NEXT:                ^
+// ALL-NEXT: 2 errors generated.
+
+// SKIP: {{.*}}:12:9: error: use of undeclared identifier 'p'
+// SKIP-NEXT: int a = LEVEL1(b);
+// SKIP-NEXT:         ^
+// SKIP-NEXT: {{.*}}:10:19: note: expanded from macro 'LEVEL1'
+// SKIP-NEXT: #define LEVEL1(x) LEVEL2(x)
+// SKIP-NEXT:                   ^
+// SKIP-NEXT: note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
+// SKIP-NEXT: {{.*}}:7:23: note: expanded from macro 'LEVEL4'
+// SKIP-NEXT: #define LEVEL4(x) ADD(p,x)
+// SKIP-NEXT:                       ^
+// SKIP-NEXT: {{.*}}:12:16: error: use of undeclared identifier 'b'
+// SKIP-NEXT: int a = LEVEL1(b);
+// SKIP-NEXT:                ^
+// SKIP-NEXT: 2 errors generated.