http://llvm.org/bugs/show_bug.cgi?id=9604
Summary: likely wrong code bug
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
This is an odd one and I cannot seem to reduce it more.
regehr@home:~/volatile/bugs/tmp009$ clang -O0 small.c -o small
regehr@home:~/volatile/bugs/tmp009$ ./small
1
regehr@home:~/volatile/bugs/tmp009$ clang -O small.c -o small
regehr@home:~/volatile/bugs/tmp009$ ./small
0
regehr@home:~/volatile/bugs/tmp009$ clang -v
clang version 3.0 (trunk 128681)
Target: i386-pc-linux-gnu
Thread model: posix
regehr@home:~/volatile/bugs/tmp009$ cat small.c
#include <stdio.h>
int g_3 = 0;
void func_57 (int **p_58)
{
*p_58 = 0;
}
int main (void)
{
int *l_4 = &g_3;
if (g_3)
{
func_57 (&l_4);
}
int x,y;
for (x = 0; x < 5; x++)
{
for (y = 0; y < 5; y++)
{
g_3 = 0;
*l_4 = 1;
}
}
printf ("%d\n", g_3);
return 0;
}
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