https://bugs.llvm.org/show_bug.cgi?id=40838
Bug ID: 40838
Summary: Wrong debug info generated at -O1/-O2/-O3 (-O0 is
correct)
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Keywords: wrong-debug
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: dav...@freebsd.org
CC: llvm-bugs@lists.llvm.org
$ cat 4.c
typedef int a;
a c, d;
char e;
char(b)(f) { return f; }
int main() {
c = e;
a l_1499 = 2922543915;
l_1499 = b(6);
l_1499 *d;
optimize_me_not();
}
$ cat outer.c
void optimize_me_not() {}
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) br set -p optimize_me_not
Breakpoint 1: where = a.out`main + 14 at 4.c:10:3, address = 0x000000000040049e
(lldb) r
Process 23400 launched: '/home/davide/finished_reducing/a.out' (x86_64)
Process 23400 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x000000000040049e a.out`main at 4.c:10:3
7 a l_1499 = 2922543915;
8 l_1499 = b(6);
9 l_1499 *d;
-> 10 optimize_me_not();
11 }
(lldb) frame var l_1499
(a) l_1499 = -1372423381
#####
-O0
(lldb) frame var l_1499
(a) l_1499 = 6
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