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 of {{[0-9]+}} bytes in function '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 #pragma GCC diagnostic push
  47 #ifndef IS_SYSHEADER
  48 // expected-warning@+2 {{unknown warning group '-Wframe-larger-than'}}
  49 #endif
  50 #pragma GCC diagnostic ignored "-Wframe-larger-than"
  51 #pragma GCC diagnostic pop
  52
  53 void frameSizeLocalClassWarning() {
  54   struct S {
  55     S() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeLocalClassWarning()::S::S'}}
  56       char buffer[80];
  57       doIt(buffer);
  58     }
  59   };
  60   S();
  61 }
  62
  63 void frameSizeLambdaWarning() {
  64   auto fn =
  65       []() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in lambda expression}}
  66     char buffer[80];
  67     doIt(buffer);
  68   };
  69   fn();
  70 }
  71
  72 void frameSizeBlocksWarning() {
  73   auto fn =
  74       ^() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in block literal}}
  75     char buffer[80];
  76     doIt(buffer);
  77   };
  78   fn();
  79 }
  80
  81 #else
  82
  83 #define IS_HEADER
  84 #include __FILE__
  85 #endif