Some more subtle issues with code suppression: - outputting asms but not their operand setup is broken - but global asms must always be output - statement expressions are transparent to code suppression - vtop can't be transformed from VT_CMP/VT_JMP when nocode_wanted Also remove .exe files from tests2 if they don't fail.
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| 1 | /* Check some way in where code suppression caused various | ||
| 2 | miscompilations. */ | ||
| 3 | extern int printf (const char *, ...); | ||
| 4 | typedef unsigned long size_t; | ||
| 5 | |||
| 6 | size_t _brk_start, _brk_end; | ||
| 7 | void * extend_brk(size_t size, size_t align) | ||
| 8 | { | ||
| 9 | size_t mask = align - 1; | ||
| 10 | void *ret = 0; | ||
| 11 | |||
| 12 | do { | ||
| 13 | if (__builtin_expect(!!(_brk_start == 0), 0)) | ||
| 14 | do { | ||
| 15 | printf("wrong1\n"); | ||
| 16 | } while (0); | ||
| 17 | } while (0); | ||
| 18 | _brk_end = (_brk_end + mask) & ~mask; | ||
| 19 | ret = (void *)_brk_end; | ||
| 20 | _brk_end += size; | ||
| 21 | |||
| 22 | return ret; | ||
| 23 | } | ||
| 24 | |||
| 25 | static void get_args (int a, int b) | ||
| 26 | { | ||
| 27 | if (a != 1) | ||
| 28 | printf("wrong2\n"); | ||
| 29 | else | ||
| 30 | printf("okay\n"); | ||
| 31 | } | ||
| 32 | |||
| 33 | void bla(void) | ||
| 34 | { | ||
| 35 | int __ret = 42; | ||
| 36 | ({ | ||
| 37 | if (__builtin_expect(!!(0), 0)) { | ||
| 38 | if (__builtin_expect(!!__ret, 0)) | ||
| 39 | printf("wrong3\n"); | ||
| 40 | int x = !!(__ret); | ||
| 41 | } | ||
| 42 | __ret; | ||
| 43 | }); | ||
| 44 | get_args(!!__ret, sizeof(__ret)); | ||
| 45 | } | ||
| 46 | |||
| 47 | _Bool chk(unsigned long addr, unsigned long limit, unsigned long size) | ||
| 48 | { | ||
| 49 | _Bool ret; | ||
| 50 | /* This just needs to compile, no runtime test. (And it doesn't compile | ||
| 51 | only with certain internal checking added that's not committed). */ | ||
| 52 | if (0) | ||
| 53 | ret = 0 != (!!(addr > limit - size)); | ||
| 54 | } | ||
| 55 | |||
| 56 | int main() | ||
| 57 | { | ||
| 58 | void *r; | ||
| 59 | _brk_start = 1024; | ||
| 60 | _brk_end = 1024; | ||
| 61 | r = extend_brk (4096, 16); | ||
| 62 | if (!r) | ||
| 63 | printf("wrong4\n"); | ||
| 64 | else | ||
| 65 | printf("okay\n"); | ||
| 66 | bla(); | ||
| 67 | return 0; | ||
| 68 | } | ||