http://llvm.org/bugs/show_bug.cgi?id=3294
Summary: another math bug
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
This looks a lot like PR 3275 but it is still wrong in r61912 on Ubuntu Hardy
on x86.
LLVM up to and including r59527 gets this right, since then it is wrong.
reg...@john-home:~/volatile/tmp112$ llvm-gcc -O0 small.c -o small
reg...@john-home:~/volatile/tmp112$ ./small
-1
reg...@john-home:~/volatile/tmp112$ llvm-gcc -O1 small.c -o small
reg...@john-home:~/volatile/tmp112$ ./small
10
reg...@john-home:~/volatile/tmp112$ cat small.c
#include <stdio.h>
unsigned g_9;
void func_1 (void);
void func_1 (void)
{
for (g_9 = 11; g_9 < (unsigned)-8; g_9--)
{
}
}
int
main (void)
{
func_1 ();
printf ("%d\n", g_9);
return 0;
}
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