clang/test/PCH/rdar8852495.c

   1 // Test this without pch.
   2 // RUN: %clang_cc1 %s -include %s -verify -fsyntax-only -Wno-sign-compare -Wtautological-compare
   3
   4 // Test with pch.
   5 // RUN: %clang_cc1 %s -emit-pch -o %t -Wsign-compare -Wtautological-compare
   6 // RUN: %clang_cc1 %s -include-pch %t -verify -fsyntax-only -Wno-sign-compare -Wtautological-compare
   7
   8 // expected-no-diagnostics
   9
  10 // This tests that diagnostic mappings from PCH are propagated for #pragma
  11 // diagnostics but not for command-line flags.
  12
  13 #ifndef HEADER
  14 #define HEADER
  15
  16 #pragma clang diagnostic ignored "-Wtautological-compare"
  17
  18 #else
  19
  20 int f(void) {
  21   int a;
  22   int b = a==a;
  23   unsigned x;
  24   signed y;
  25   return x == y;
  26 }
  27
  28 #endif