clang/test/Misc/backend-stack-frame-diagnostics.cpp

   1 // REQUIRES: x86-registered-target
   2 // RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Wno-stdlibcxx-not-found -Xclang -verify -o /dev/null -c %s
   3 // RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Wno-stdlibcxx-not-found -Xclang -verify -o /dev/null -c %s -DIS_SYSHEADER
   4
   5 // Test that:
   6 //  * The driver passes the option through to the backend.
   7 //  * The frontend diagnostic handler 'demangles' and resolves the correct function definition.
   8
   9 // Test that link invocations don't emit an "argument unused during compilation" diagnostic.
  10 // RUN: touch %t.o
  11 // RUN: %clang -Werror -Wno-msvc-not-found -Wno-liblto -Wframe-larger-than=0 %t.o -###  2>&1 | not grep ' error: '
  12
  13 // TODO: Support rich backend diagnostics for Objective-C methods.
  14
  15 // Backend diagnostics aren't suppressed in system headers because such results
  16 // are significant and actionable.
  17 #ifdef IS_HEADER
  18
  19 #ifdef IS_SYSHEADER
  20 #pragma clang system_header
  21 #endif
  22
  23 extern void doIt(char *);
  24
  25 void frameSizeWarning(int, int) {}
  26
  27 void frameSizeWarning();
  28
  29 void frameSizeWarning() { // expected-warning-re {{stack frame size ({{[0-9]+}}) exceeds limit ({{[0-9]+}}) in 'frameSizeWarning()'}}
  30   char buffer[80];
  31   doIt(buffer);
  32 }
  33
  34 void frameSizeWarning();
  35
  36 void frameSizeWarning(int) {}
  37
  38 #pragma GCC diagnostic push
  39 #pragma GCC diagnostic ignored "-Wframe-larger-than"
  40 void frameSizeWarningIgnored() {
  41   char buffer[80];
  42   doIt(buffer);
  43 }
  44 #pragma GCC diagnostic pop
  45
  46 void frameSizeLocalClassWarning() {
  47   struct S {
  48     S() { // expected-warning-re {{stack frame size ({{[0-9]+}}) exceeds limit ({{[0-9]+}}) in 'frameSizeLocalClassWarning()::S::S()'}}
  49       char buffer[80];
  50       doIt(buffer);
  51     }
  52   };
  53   S();
  54 }
  55
  56 void frameSizeLambdaWarning() {
  57   auto fn =
  58       []() { // expected-warning-re {{stack frame size ({{[0-9]+}}) exceeds limit ({{[0-9]+}}) in 'frameSizeLambdaWarning()::$_0::operator()() const'}}
  59     char buffer[80];
  60     doIt(buffer);
  61   };
  62   fn();
  63 }
  64
  65 void frameSizeBlocksWarning() {
  66   auto fn =
  67       ^() { // expected-warning-re {{stack frame size ({{[0-9]+}}) exceeds limit ({{[0-9]+}}) in 'invocation function for block in frameSizeBlocksWarning()'}}
  68     char buffer[80];
  69     doIt(buffer);
  70   };
  71   fn();
  72 }
  73
  74 #else
  75
  76 #define IS_HEADER
  77 #include __FILE__
  78 #endif