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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [gcc/] [testsuite/] [gcc.dg/] [tree-ssa/] [pr20933.c] - Rev 12
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/* { dg-do compile } */ /* { dg-options "-O2" } */ extern __SIZE_TYPE__ strlen (__const char *__s) __attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1))); extern char *strcpy (char *__restrict __dest, __const char *__restrict __src) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2))); extern char *getenv (__const char *__name) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1))); extern int access (__const char *__name, int __type) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1))); extern void * xmalloc (__SIZE_TYPE__) __attribute__ ((__malloc__)); static __inline__ const char * try (const char *dir, const char *base) { if (base != 0) return base; if (dir != 0 && access (dir, 4 | 2 | 1) == 0) return dir; return 0; } static const char tmp[] = { '/', 't', 'm', 'p', 0 }; static const char usrtmp[] = { '/', 'u', 's', 'r', '/', 't', 'm', 'p', 0 }; static const char vartmp[] = { '/', 'v', 'a', 'r', '/', 't', 'm', 'p', 0 }; static char *memoized_tmpdir; char * choose_tmpdir (void) { const char *base = 0; char *tmpdir; unsigned int len; if (memoized_tmpdir) return memoized_tmpdir; base = try (getenv ("TMPDIR"), base); base = try (getenv ("TMP"), base); base = try (getenv ("TEMP"), base); base = try ("/tmp", base); base = try (vartmp, base); base = try (usrtmp, base); base = try (tmp, base); if (base == 0) base = "."; len = strlen (base); tmpdir = xmalloc (len + 2); strcpy (tmpdir, base); /* Alias analysis was associating read-only memory tags to pointers that are not read-only. We would then not issue any V_MAY_DEF in this store. */ tmpdir[len] = '/'; tmpdir[len+1] = '\0'; memoized_tmpdir = tmpdir; return tmpdir; }