Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.c-torture/execute/printf-2.c @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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/* Verify that calls to printf don't get eliminated even if their result on success can be computed at compile time (they can fail). The calls can still be transformed into those of other functions. { dg-require-effective-target unwrapped } { dg-prune-output "warning: warning: \[^\n\r\]* possibly used unsafely" } { dg-skip-if "requires io" { avr-*-* } } { dg-skip-if "requires io" { freestanding } } */ #include <stdio.h> #include <stdlib.h> #include <string.h> __attribute__ ((noipa)) void write_file (void) { printf ("1"); printf ("%c", '2'); printf ("%c%c", '3', '4'); printf ("%s", "5"); printf ("%s%s", "6", "7"); printf ("%i", 8); printf ("%.1s\n", "9x"); } int main (void) { char *tmpfname = tmpnam (0); FILE *f = freopen (tmpfname, "w", stdout); if (!f) { perror ("fopen for writing"); return 1; } write_file (); fclose (f); f = fopen (tmpfname, "r"); if (!f) { perror ("fopen for reading"); remove (tmpfname); return 1; } char buf[12] = ""; if (1 != fscanf (f, "%s", buf)) { perror ("fscanf"); fclose (f); remove (tmpfname); return 1; } fclose (f); remove (tmpfname); if (strcmp (buf, "123456789")) abort (); return 0; }