https://llvm.org/bugs/show_bug.cgi?id=25309
Bug ID: 25309
Summary: Miscompilation with K&R function prototype
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: PowerPC
Assignee: unassignedb...@nondot.org
Reporter: an...@samba.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
creduce gave me the following cut down testcase:
#include <assert.h>
static int i;
static int *volatile m = &i, *o = &i;
static void zot(void)
{
assert(*o);
}
void blah() { }
int main(void)
{
*o = 0;
*m = 1;
blah(&o);
zot();
return 0;
}
I was somewhat surprised clang accepts K&R function prototypes, but it does,
and we miscompile the testcase at -O2.
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