backend-stack-frame-diagnostics.cpp revision ef8225444452a1486bd721f3285301fe84643b00 
1// REQUIRES: x86-registered-target
2// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -Xclang -verify -o /dev/null -c %s
3// RUN: %clang -target i386-apple-darwin -std=c++11 -fblocks -Wframe-larger-than=70 -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 -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
23extern void doIt(char *);
24
25void frameSizeWarning(int, int) {}
26
27void frameSizeWarning();
28
29void frameSizeWarning() { // expected-warning-re {{stack frame size of {{[0-9]+}} bytes in function 'frameSizeWarning'}}
30  char buffer[80];
31  doIt(buffer);
32}
33
34void frameSizeWarning();
35
36void frameSizeWarning(int) {}
37
38#pragma GCC diagnostic push
39#pragma GCC diagnostic ignored "-Wframe-larger-than="
40void 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
53void 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
63void 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
72void 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
86