Viewing file:  strlenopt-49.c (1.33 KB) -rw-r--r--
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/* PR tree-optimization/86428 - strlen of const array initialized with
a string of the same length not folded
{ dg-do compile }
{ dg-options "-O0 -Wall -fdump-tree-gimple" } */
#include "strlenopt.h"
const char a1[1] = "\0";
const char a2[2] = "1\0";
const char a3[3] = "12\0";
const char a8[8] = "1234567\0";
const char a9[9] = "12345678\0";
const char ax[9] = "12345678\0\0\0\0"; /* { dg-warning "initializer-string for array of 'char' is too long" } */
const char ay[9] = "\00012345678\0\0\0\0"; /* { dg-warning "initializer-string for array of 'char' is too long" } */
int len1 (void)
{
size_t len0 = strlen (a1);
return len0;
}
int len (void)
{
size_t len = strlen (a2) + strlen (a3) + strlen (a8) + strlen (a9);
return len;
}
int lenx (void)
{
size_t lenx = strlen (ax);
return lenx;
}
int leny (void)
{
size_t leny = strlen (ay);
return leny;
}
int cmp88 (void)
{
int cmp88 = memcmp (a8, "1234567\0", sizeof a8);
return cmp88;
}
/* { dg-final { scan-tree-dump-times "strlen1" 0 "gimple" } }
{ dg-final { scan-tree-dump-times "len0 = 0;" 1 "gimple" } }
{ dg-final { scan-tree-dump-times "len = 18;" 1 "gimple" } }
{ dg-final { scan-tree-dump-times "lenx = 8;" 1 "gimple" } }
{ dg-final { scan-tree-dump-times "leny = 0;" 1 "gimple" } }
{ dg-final { scan-tree-dump-times "cmp88 = 0;" 1 "gimple" } } */
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