diff options
Diffstat (limited to 'gcc/testsuite/c-c++-common')
23 files changed, 2628 insertions, 0 deletions
diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-1.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-1.c new file mode 100644 index 00000000000..b45880f19b4 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-1.c @@ -0,0 +1,38 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ +/* Test taken from + <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0188r0.pdf>. */ + +extern void f (int); + +void +foo (int n) +{ + switch (n) + { + case 22: + case 33: + f (1); /* { dg-warning "statement may fall through" } */ + case 44: + f (2); + __attribute__((fallthrough)); + case 55: + if (n > 10) + { + f (3); + break; + } + else + { + f (4); + __attribute__((fallthrough)); + } + case 66: + f (5); + __attribute__((fallthrough)); /* { dg-warning "not preceding" } */ + f (6); /* { dg-warning "statement may fall through" } */ + case 77: + f (7); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-10.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-10.c new file mode 100644 index 00000000000..99e44d9be7a --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-10.c @@ -0,0 +1,239 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); + +void +f (int i) +{ + switch (i) + { + case 1: + if (i) + { + bar (0); + break; + } + else if (i > 10) + { + bar (1); + __attribute__((fallthrough)); + } + else + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (2); + else if (i > 10) + { + bar (3); + __attribute__((fallthrough)); + } + else + break; + case 2: + bar (4); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + break; + } + else if (i > 10) /* { dg-warning "statement may fall through" } */ + { + bar (1); + } + else + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + break; + } + else if (i > 10) + { + bar (1); + break; + } + else + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + break; + } + else if (i > 10) + { + bar (1); + break; + } + else + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + __attribute__((fallthrough)); + } + else if (i > 10) + { + bar (1); + break; + } + else + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + __attribute__((fallthrough)); + } + else if (i > 10) + { + bar (1); + __attribute__((fallthrough)); + } + else + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + __attribute__((fallthrough)); + } + else if (i > 10) + { + bar (1); + __attribute__((fallthrough)); + } + else + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + __attribute__((fallthrough)); + } + else if (i > 10) /* { dg-warning "statement may fall through" } */ + { + bar (1); + bar (2); + } + else + __attribute__((fallthrough)); + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + { + bar (0); + } + else if (i > 10) + { + bar (1); + } + else + { + bar (1); + __attribute__((fallthrough)); + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + __attribute__((fallthrough)); + } + else if (i > 10) + { + bar (1); + break; + } + else + { + bar (1); + __attribute__((fallthrough)); + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i) + { + bar (0); + break; + } + else if (i > 10) /* { dg-warning "statement may fall through" } */ + { + bar (1); + } + else + { + bar (1); + __attribute__((fallthrough)); + } + case 2: + bar (99); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-11.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-11.c new file mode 100644 index 00000000000..e8f47f56ab9 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-11.c @@ -0,0 +1,23 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough -O2" } */ + +/* Prevent false positive with optimizations. */ + +extern void g (int); + +void +f (int i) +{ + switch (i) + { + case 1: + if (i > 10) + g (0); + else + goto L; + break; +L: + case 2:; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-12.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-12.c new file mode 100644 index 00000000000..91a68ab0771 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-12.c @@ -0,0 +1,26 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough -O2" } */ + +/* Don't let optimizations preclude the warning. */ + +extern void bar (int); + +void +f (int i) +{ + switch (i) + { + case 1: + if (i > 1) + bar (1); + else + goto D; + break; + case 2: + bar (2); /* { dg-warning "statement may fall through" } */ + D: + default: + bar (33); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-13.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-13.c new file mode 100644 index 00000000000..f3ec79f9756 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-13.c @@ -0,0 +1,63 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* As per <http://security.coverity.com/blog/2013/Sep/gimme-a-break.html>, don't + warn for terminated branches (fall through to break / end of the switch). */ + +extern void bar (int); + +void +f (int i) +{ + switch (i) + { + case 1: + bar (1); + default: + return; + } + + switch (i) + { + case 1: + bar (1); + default: + goto X; + } +X: + + switch (i) + { + case 1: + bar (1); + default: + break; + } + + switch (i) + { + case 1: + bar (1); + case 2: + case 3: + default: + break; + } + + switch (i) + { + case 1: + bar (1); + default:; + } + + switch (i) + { + case 1: + bar (1); + case 2: + case 3: + default:; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-14.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-14.c new file mode 100644 index 00000000000..b7c825b5450 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-14.c @@ -0,0 +1,162 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Test various falls through comments. */ + +extern void bar (int); + +void +fn (int i) +{ + switch (i) + { + case -1: + bar (-1); + /*-fallthrough*/ + case 0: + bar (0); + /*@fallthrough@*/ + case 1: + bar (1); + /* FALL THRU */ + case 2: + bar (2); + /* FALLTHRU */ + case 3: + bar (3); + /* FALLS THRU */ + case 4: + bar (4); + /* FALL-THRU */ + case 5: + bar (5); + /* FALL THROUGH */ + case 6: + bar (6); + /* FALLTHROUGH */ + case 7: + bar (7); + /* FALLS THROUGH */ + case 8: + bar (8); + /* FALL-THROUGH */ + case 9: + bar (9); + /*FALLTHRU*/ + case 10: + bar (10); + /* FALLTHRU.*/ + case 11: + bar (11); + /* FALLTHROUGH. */ + case 12: + bar (12); + /* Fall thru */ + case 13: + bar (13); + /* Falls thru */ + case 14: + bar (14); + /* Fall-thru */ + case 15: + bar (15); + /* Fall Thru */ + case 16: + bar (16); + /* Falls Thru */ + case 17: + bar (17); + /* Fall-Thru */ + case 18: + bar (18); + /* Fall through */ + case 19: + bar (19); + /* Falls through */ + case 20: + bar (20); + /* Fall-through */ + case 21: + bar (21); + /* Fall Through */ + case 22: + bar (22); + /* Falls Through */ + case 23: + bar (23); + /* Fall-Through */ + case 24: + bar (24); + /* Falls through. */ + case 25: + bar (25); + /* Falls through. */ + case 26: + bar (26); + /* fall thru */ + case 27: + bar (27); + /* falls thru */ + case 28: + bar (28); + /* fall-thru */ + case 29: + bar (29); + /* fall thru */ + case 30: + bar (30); + /* falls thru */ + case 31: + bar (31); + /* fall-thru */ + case 32: + bar (32); + /* fall through */ + case 33: + bar (33); + /* falls through */ + case 34: + bar (34); + /* fall-through */ + default: + bar (99); + } + + switch (i) + { + case 0: + i++; + /*@fallthrough@*/ +L: + default: + bar (6); + } + + { + __label__ L2; + switch (i) + { + case 0: + i++; + /*@fallthrough@*/ +L2: + default: + bar (6); + } + } + + /* Don't generate false -Wswitch-unreachable warning. */ + switch (i) + { + /*FALLTHROUGH*/ + case 0: + i++; + } + + if (i) + { + /* fall through */ + L1:; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-15.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-15.c new file mode 100644 index 00000000000..ee3e52d5dc4 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-15.c @@ -0,0 +1,31 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Another nested switch. Check that we don't warn here. */ + +void +f (int i) +{ + int j = 0; + switch (i) + { + case 0: + case 1: + j = 10; + __attribute__((fallthrough)); + case 2: + j += 10; + break; + case 3: + switch (i) + { + case 5: + j += 2; + __attribute__((fallthrough)); + case 6: + j += 4; + break; + } + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-16.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-16.c new file mode 100644 index 00000000000..923f0121475 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-16.c @@ -0,0 +1,32 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Another nested switch, and with an initialization on top. Check that + we do warn here. */ + +void +f (int i) +{ + switch (i) + { + case 1: + { + int t = 3; + switch (i) + { + case 3: + if (i > 5) + --i; + i += 10; /* { dg-warning "statement may fall through" } */ + case 4: + t /= 5; + break; + } + break; + } + case 2: + --i; + break; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-17.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-17.c new file mode 100644 index 00000000000..23ff5f184fb --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-17.c @@ -0,0 +1,29 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Another nested switch, and with an initialization on top. Check that + we do not warn here as the case 3 falls through to break. */ + +void +f (int i) +{ + switch (i) + { + case 1: + { + int t = 3; + switch (i) + { + case 3: + i += 10; + case 4: + break; + } + break; + } + case 2: + --i; + break; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-18.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-18.c new file mode 100644 index 00000000000..2c8a3cb98b3 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-18.c @@ -0,0 +1,42 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Testing some loops. */ + +int f (void); + +int +g (int i) +{ + switch (i) + { + case 0: + for (;;) + { + if (f ()) /* { dg-warning "statement may fall through" "fall through" { xfail *-*-* } } */ + break; + } + case 1: + return 1; + } + return 0; +} + +int +h (int i) +{ + switch (i) + { + case 0: + do + { + if (f ()) /* { dg-warning "statement may fall through" } */ + break; + } + while (0); + case 1: + return 1; + } + return 0; +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-19.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-19.c new file mode 100644 index 00000000000..b7a37910db3 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-19.c @@ -0,0 +1,85 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Testing non-case labels. */ + +int foo (int); + +void +f1 (int i) +{ + switch (i) + { + case 0: + foo (1); + L1: + foo (2); + } + + switch (i) + { + case 0: + foo (1); /* { dg-warning "statement may fall through" } */ + L2: + case 2: + foo (2); + } + + switch (i) + { + case 0: + foo (1); /* { dg-warning "statement may fall through" } */ + case 2: + L3: + foo (2); + } + + switch (i) + { + case 0: + foo (1); /* { dg-warning "statement may fall through" } */ + L4: + case 2: + L5: + foo (2); + } + + switch (i) + { + case 0: + switch (i) + { + case 1: + foo (2); + L6: + foo (3); + } + } + + switch (i) + { + case 0: + switch (i) + { + case 1: + foo (2); /* { dg-warning "statement may fall through" } */ + L7: + case 2: + foo (3); + } + } + + switch (i) + { + case 0: + switch (i) + { + case 1: + foo (2); /* { dg-warning "statement may fall through" } */ + case 2: + L8: + foo (3); + } + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-2.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-2.c new file mode 100644 index 00000000000..4dfb278c27b --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-2.c @@ -0,0 +1,223 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); + +/* Test if without else. */ + +void +f (int i) +{ + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + goto L1; + case 2: +L1: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + goto L2; +L2: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L3; + break; + case 2: +L3: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L4; + break; +L4: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + if (i > 9) + bar (1); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + if (i > 9) + bar (1); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + { int a; } + { + if (i) /* { dg-warning "statement may fall through" } */ + if (i > 9) + bar (1); + } + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + bar (2); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + bar (2); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + if (i) + bar (2); + if (i) + bar (3); + bar (4); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + if (i) + bar (2); + if (i) /* { dg-warning "statement may fall through" } */ + bar (3); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + if (i) + bar (2); + if (i) + bar (3); + bar (4); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + if (i) + bar (2); + if (i) + bar (3); + break; + case 2: + __builtin_abort (); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-20.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-20.c new file mode 100644 index 00000000000..d37a840a0d9 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-20.c @@ -0,0 +1,41 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +int +f (int i) +{ + switch (i) + { + case -1: + __attribute__((fallthrough)); + default: + __attribute__((fallthrough)); + case 1: + return 6; + case 2 ... 4: + __attribute__((fallthrough)); + case 5: + return 7; + } + return 0; +} + +int +g (int i) +{ + switch (i) + { + case -1: + __attribute__((used)); /* { dg-warning "ignored|only attribute" } */ + default: + __attribute__((used)); /* { dg-warning "ignored|only attribute" } */ + case 1: + return 6; + case 2 ... 4: + __attribute__((used)); /* { dg-warning "ignored|only attribute" } */ + case 5: + return 7; + } + return 0; +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-21.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-21.c new file mode 100644 index 00000000000..6092a9018f3 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-21.c @@ -0,0 +1,25 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +int +f (int i) +{ + switch (i) + { + case 0: + i++; + __attribute__((fallthrough)); + lab1: + case 1: + i++; + __attribute__((fallthrough)); /* { dg-warning "not preceding" } */ + lab2: + --i; + break; + case 3: + i++; + break; + } + return 0; +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-3.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-3.c new file mode 100644 index 00000000000..fbb97122ecb --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-3.c @@ -0,0 +1,543 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); + +/* Test if with else. */ + +void +f (int i) +{ + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + else + bar (2); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + bar (2); + bar (3); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + bar (2); + bar (3); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + else + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + return; + bar (3); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + return; + bar (3); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + { + bar (1); + bar (2); + bar (3); + bar (4); + } + else + { + bar (5); + bar (6); + bar (7); + bar (8); + } + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + bar (1); + bar (2); + bar (3); + bar (4); + } + else + { + bar (5); + bar (6); + bar (7); + bar (8); + } + bar (9); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + { + } + else + bar (2); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + else + { + } + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + { + } + else + { + } + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + return; + else + { + } + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + { + } + else + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L1; + else + bar (2); /* { dg-warning "statement may fall through" } */ + case 2: +L1: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L2; + else + bar (2); /* { dg-warning "statement may fall through" } */ +L2: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + else + goto L3; + case 2: +L3: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) /* { dg-warning "statement may fall through" } */ + bar (1); + else + goto L4; +L4: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L5; + else + goto L5; +L5: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + bar (2); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + bar (2); + bar (3); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + bar (2); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + bar (2); + bar (3); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + return; + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + return; + bar (3); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + return; + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + return; + bar (3); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + bar (1); + bar (2); + bar (3); + bar (4); + } + else + { + bar (5); + bar (6); + bar (7); + bar (8); + } + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + bar (1); + bar (2); + bar (3); + bar (4); + } + else + { + bar (5); + bar (6); + bar (7); + bar (8); + } + bar (9); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + } + else + bar (2); + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + { + } + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + } + else + { + } + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + return; + else + { + } + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + { + } + else + return; + break; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L6; + else + bar (2); + break; + case 2: +L6: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L7; + else + bar (2); + break; +L7: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + goto L8; + break; + case 2: +L8: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + bar (1); + else + goto L9; + break; +L9: + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i) + goto L10; + else + goto L10; + break; +L10: + case 2: + __builtin_abort (); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-4.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-4.c new file mode 100644 index 00000000000..9a0aeb753d9 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-4.c @@ -0,0 +1,250 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); + +/* Test if with more elses. */ + +void +f (int i) +{ + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + bar (2); + else if (i > 15) + bar (3); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + bar (2); + else if (i > 15) + bar (3); + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) /* { dg-warning "statement may fall through" } */ + bar (2); + else if (i > 15) + bar (3); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) /* { dg-warning "statement may fall through" } */ + bar (2); + else if (i > 15) + bar (3); + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + return; + else if (i > 15) + bar (3); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + return; + else if (i > 15) + bar (3); + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + bar (4); + else if (i > 15) + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + bar (4); + else if (i > 15) + return; + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) + return; + else if (i > 15) /* { dg-warning "statement may fall through" } */ + bar (3); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) + return; + else if (i > 15) /* { dg-warning "statement may fall through" } */ + bar (3); + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) /* { dg-warning "statement may fall through" } */ + bar (2); + else if (i > 15) + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) /* { dg-warning "statement may fall through" } */ + bar (2); + else if (i > 15) + return; + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + return; + else if (i > 15) + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) /* { dg-warning "statement may fall through" } */ + bar (1); + else if (i > 10) + return; + else if (i > 15) + return; + else + bar (4); + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) + return; + else if (i > 15) /* { dg-warning "statement may fall through" } */ + return; + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) + return; + else if (i > 15) + return; + else + bar (4); /* { dg-warning "statement may fall through" } */ + case 2: + __builtin_abort (); + } + + switch (i) + { + case 1: + if (i > 5) + return; + else if (i > 10) + return; + else if (i > 15) + return; + else + return; + case 2: + __builtin_abort (); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-5.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-5.c new file mode 100644 index 00000000000..9317484dbb2 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-5.c @@ -0,0 +1,109 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); +extern void die (void) __attribute__((noreturn)); + +/* Test may_fallthru-ness. */ + +void +f (int i) +{ + switch (i) + { + case 1: + bar (0); + __attribute__((fallthrough)); + case 2:; + } + + switch (i) + { + case 1: + bar (0); + return; + case 2:; + } + + switch (i) + { + case 1: + bar (0); + break; + case 2:; + } + + switch (i) + { + case 1: + bar (0); + goto L1; +L1: + case 2:; + } + + switch (i) + { + case 1: + bar (0); + die (); + case 2:; + } + + switch (i) + { + case 1: + { + int i, j, k; + bar (0); + __attribute__((fallthrough)); + } + case 2:; + } + + switch (i) + { + case 1: + { + int i, j, k; + bar (0); + return; + } + case 2:; + } + + switch (i) + { + case 1: + { + int i, j, k; + bar (0); + break; + } + case 2:; + } + + switch (i) + { + case 1: + { + int i, j, k; + bar (0); + goto L2; + } +L2: + case 2:; + } + + switch (i) + { + case 1: + { + int i, j, k; + bar (0); + die (); + } + case 2:; + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-6.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-6.c new file mode 100644 index 00000000000..8364c1b670b --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-6.c @@ -0,0 +1,305 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); + +/* Test nested scopes. */ + +void +f (int i) +{ + switch (i) + { + case 1: + { + int j; + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 10; /* { dg-warning "statement may fall through" } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int k = 9; + k++; + { + int j = 10; + j++; /* { dg-warning "statement may fall through" } */ + } + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int k = 9; + k++; + { + int j = 10; + j++; + { + bar (1); /* { dg-warning "statement may fall through" } */ + } + } + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + __attribute__((fallthrough)); + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + { + int k = j + 5; + bar (k); + __attribute__((fallthrough)); + } + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + return; + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + goto L1; + } +L1: + case 2: + bar (99); + } + + switch (i) + { + case 1: + { /* { dg-warning "statement may fall through" "" { target c } 120 } */ + int j = 0; + bar (j); + if (j == 8) + return; /* { dg-warning "statement may fall through" "" { target c++ } 124 } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + return; + else + return; + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { /* { dg-warning "statement may fall through" "" { target c } 148 } */ + int j = 0; + bar (j); + if (j == 8) + bar (1); + else + return; /* { dg-warning "statement may fall through" "" { target c++ } 154 } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + return; + else + bar (2); /* { dg-warning "statement may fall through" } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { /* { dg-warning "statement may fall through" "" { target c } 178 } */ + int j = 0; + bar (j); + if (j == 8) + bar (1); + else + bar (2); /* { dg-warning "statement may fall through" "" { target c++ } 184 } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + return; + } + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + return; + else + return; + } + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + bar (1); + else + return; + } + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + return; + else + bar (2); + } + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + bar (1); + else + bar (2); + } + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 9; + while (1); + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { /* { dg-warning "statement may fall through" "" { target c } 282 } */ + int j = 9; + switch (j); /* { dg-warning "statement may fall through" "" { target c++ } 284 } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + int j = 0; + bar (j); + if (j == 8) + bar (1); + else + bar (2); + __attribute__((fallthrough)); + } + case 2: + bar (99); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-7.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-7.c new file mode 100644 index 00000000000..21a158ca14f --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-7.c @@ -0,0 +1,124 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void bar (int); +extern int bar2 (void); +extern int *map; +void +f (int i) +{ + switch (i) + { + case 1: + bar (0); /* { dg-warning "statement may fall through" } */ + static int i = 10; + case 2: + bar (99); + } + + switch (i) + { + case 1: + { /* { dg-warning "statement may fall through" "" { target c } 23 } */ + int a[i]; /* { dg-warning "statement may fall through" "" { target c++ } 24 } */ + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + for (int j = 0; j < 10; j++) /* { dg-warning "statement may fall through" "" { target c } 33 } */ + map[j] = j; /* { dg-warning "statement may fall through" "" { target c++ } 34 } */ + case 2: + bar (99); + } + + switch (i) + { + case 1: + do /* { dg-warning "statement may fall through" "" { target c++ } 42 } */ + bar (2); + while (--i); /* { dg-warning "statement may fall through" "" { target c } 44 } */ + case 2: + bar (99); + } + + switch (i) + { + case 1: + { + switch (i + 2) + case 4: + bar (1); /* { dg-warning "statement may fall through" } */ + case 5: + bar (5); + return; + } + case 2: + bar (99); + } + + switch (i) + { + case 1:; + case 2:; + } + + switch (i) + { + } + + switch (i) + { + case 1: + if (i & 1) /* { dg-warning "statement may fall through" } */ + { + bar (23); + break; + } + case 2: + bar (99); + } + + switch (i) + { + case 1: + if (i > 9) /* { dg-warning "statement may fall through" } */ + { + bar (9); + if (i == 10) + { + bar (10); + break; + } + } + case 2: + bar (99); + } + + int r; + switch (i) + { + case 1: + r = bar2 (); + if (r) /* { dg-warning "statement may fall through" } */ + break; + case 2: + bar (99); + } + + switch (i) + { + case 1: + r = bar2 (); + if (r) + return; + if (!i) /* { dg-warning "statement may fall through" } */ + return; + case 2: + bar (99); + } +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-8.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-8.c new file mode 100644 index 00000000000..0ed7928fd79 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-8.c @@ -0,0 +1,101 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +extern void grace (int); + +int +fn1 (int i) +{ + switch (i) + case 1: + if (i == 5) + grace (0); + else + goto done; +done:; +} + +int +fn2 (int i) +{ + switch (i) + { + case 1: + if (i == 5) /* { dg-warning "statement may fall through" } */ + grace (0); + else + goto done; + case 2: + --i; + } +done:; +} + +int +fn3 (int i) +{ + switch (i) + { + case 1: + if (i == 5) + goto done; + else + goto done; + } +done:; +} + +int +fn4 (int i) +{ + switch (i) + { + case 1: + if (i == 5) + { + grace (1); + goto done; + } + else + goto done; + case 2:; + } +done:; +} + +int +fn5 (int i) +{ + switch (i) + { + case 1: + if (i == 5) + { + grace (1); + goto done; + } + else + grace (4); /* { dg-warning "statement may fall through" } */ + case 2: + grace (9); + } +done:; +} + +int +fn6 (int i) +{ + switch (i) + { + case 1: + if (i == 5) /* { dg-warning "statement may fall through" } */ + { + grace (1); + goto done; + } + case 2: + grace (8); + } +done:; +} diff --git a/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-9.c b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-9.c new file mode 100644 index 00000000000..394d6998b65 --- /dev/null +++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-9.c @@ -0,0 +1,26 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wimplicit-fallthrough" } */ + +/* Test we don't remove FALLTHROUGH () too early. */ + +extern void h (int); + +void +g (int i) +{ + switch (i) + { + case 1: + { + switch (i) + { + case 3: + h (7); + __attribute__((fallthrough)); + case 4:; + } + } + case 2:; + } +} diff --git a/gcc/testsuite/c-c++-common/attr-fallthrough-1.c b/gcc/testsuite/c-c++-common/attr-fallthrough-1.c new file mode 100644 index 00000000000..ecfd094d9cd --- /dev/null +++ b/gcc/testsuite/c-c++-common/attr-fallthrough-1.c @@ -0,0 +1,57 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wall -Wextra -Wpedantic" } */ + +extern void bar (int); +void +fn (int i) +{ + __attribute__((fallthrough)) int j = 0; /* { dg-warning "ignored|attribute not followed" } */ + + if (j) + __attribute__((fallthrough)); /* { dg-error "invalid use" } */ + + __attribute__((fallthrough)); /* { dg-error "invalid use" } */ + switch (i) + { + __attribute__((fallthrough)); /* { dg-warning "statement will never" } */ + case 1: + i++; + __attribute__((fallthrough)); + case 2: + if (i) /* { dg-warning "statement may fall through" } */ + bar (2); + else + __attribute__((fallthrough)); + case 3: + if (i > 1) + __attribute__((fallthrough)); + else + return; + case 4: + if (i) + __attribute__((fallthrough)); /* { dg-warning "not preceding" } */ + __attribute__((fallthrough)); + case 5: + ; + __attribute__((fallthrough)); + case 6: + if (i) /* { dg-warning "statement may fall through" } */ + bar (6); + else + { + __attribute__((fallthrough)); + } + case 7: + if (i > 1) + { + __attribute__((fallthrough)); + } + else + bar (7); /* { dg-warning "statement may fall through" } */ + default: + --j; + } + + __attribute__((fallthrough)); /* { dg-error "invalid use" } */ +} diff --git a/gcc/testsuite/c-c++-common/attr-fallthrough-2.c b/gcc/testsuite/c-c++-common/attr-fallthrough-2.c new file mode 100644 index 00000000000..959564bca9f --- /dev/null +++ b/gcc/testsuite/c-c++-common/attr-fallthrough-2.c @@ -0,0 +1,54 @@ +/* PR c/7652 */ +/* { dg-do compile } */ +/* { dg-options "-Wall -Wextra -Wpedantic -Wno-unused -Wno-implicit-fallthrough" } */ + +extern void bar (int); +void +fn (int i) +{ + switch (i) + { + case 1: + bar (1); + __attribute__((used)); + /* { dg-warning "empty declaration" "" { target c } 13 } */ + /* { dg-warning "ignored" "" { target c++ } 13 } */ + case 2: + bar (1); + __attribute__((foo)); + /* { dg-warning "empty declaration" "" { target c } 18 } */ + /* { dg-warning "ignored" "" { target c++ } 18 } */ + case 3: + bar (1); + __attribute__((fallthrough)) /* { dg-warning "not followed" "" { target c } } */ + case 4: /* { dg-error "expected" } */ + bar (1); + __attribute__((fallthrough)) 1; + /* { dg-error "expected" "" { target c } 26 } */ + /* { dg-warning "not followed" "" { target *-*-* } 26 } */ + case 5: + bar (1); + __attribute__((fallthrough)) int i; /* { dg-warning "ignored|not followed" } */ + case 6: + bar (1); + __attribute__((fallthrough ("x"))); /* { dg-warning "specified with a parameter" } */ + case 7: + bar (1); + __attribute__((fallthrough, fallthrough)); /* { dg-warning "attribute specified multiple times" } */ + case 8: + bar (1); + __attribute__((fallthrough)); + case 9: + __attribute__((fallthrough)); + /* { dg-warning "not preceding" "" { target *-*-* } 42 } */ + bar (1); + case 10: + bar (1); + __attribute__((unused, fallthrough)); /* { dg-warning "attribute ignored" } */ + case 11: + bar (1); + __attribute__((fallthrough, unused)); /* { dg-warning "attribute ignored" } */ + default: + bar (99); + } +} |