1 files changed, 36 insertions, 0 deletions
diff --git a/test/Sema/warn-absolute-value-header.c b/test/Sema/warn-absolute-value-header.c
new file mode 100644
index 0000000..0c7c3a8
--- /dev/null
+++ b/test/Sema/warn-absolute-value-header.c
@@ -0,0 +1,36 @@
+// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only -verify %s -Wabsolute-value
+// RUN: %clang_cc1 -triple i686-pc-linux-gnu -fsyntax-only %s -Wabsolute-value -fdiagnostics-parseable-fixits 2>&1 | FileCheck %s
+
+int abs(int);
+
+// Wrong signature
+int fabsf(int);
+// expected-warning@-1{{incompatible redeclaration of library function 'fabsf'}}
+// expected-note@-2{{'fabsf' is a builtin with type 'float (float)'}}
+
+void test_int(int i, unsigned u, long long ll, float f, double d) {
+  (void)abs(i);
+
+  // Remove abs call
+  (void)abs(u);
+  // expected-warning@-1{{taking the absolute value of unsigned type 'unsigned int' has no effect}}
+  // expected-note@-2{{remove the call to 'abs' since unsigned values cannot be negative}}
+  // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:9-[[@LINE-3]]:12}:""
+
+  int llabs;
+  (void)llabs;
+  // Conflict in names, no notes
+  (void)abs(ll);
+  // expected-warning@-1{{absolute value function 'abs' given an argument of type 'long long' but has parameter of type 'int' which may cause truncation of value}}
+
+  // Conflict in names, no notes
+  (void)abs(f);
+  // expected-warning@-1{{using integer absolute value function 'abs' when argument is of floating point type}}
+
+  // Suggest header.
+  (void)abs(d);
+  // expected-warning@-1{{using integer absolute value function 'abs' when argument is of floating point type}}
+  // expected-note@-2{{use function 'fabs' instead}}
+  // expected-note@-3{{include the header <math.h> or explicitly provide a declaration for 'fabs'}}
+  // CHECK: fix-it:"{{.*}}":{[[@LINE-4]]:9-[[@LINE-4]]:12}:"fabs"
+}