Hi all,
Iām Xiang Cheng in Gatech and Iām interested in this project: http://llvm.org/OpenProjects.html#llvm_dbg_invariant
I noticed that this project is not in the GSoC selected projects list, so I think nobody is working on this.
Now I try to reproduce this issue on aarch64 Ubuntu-18.04 using the latest LLVM-10 release with following code (http://lists.llvm.org/pipermail/llvm-dev/2019-September/135433.html):
void b(void* d){}
void c(char* cc, void* d){}
void a() {
b(a);
for (;
c(āā, b);
}
int main(){
a();
return 0;
}
I compile it using ā-O0 -gā or only ā-O0ā. However, I failed to reproduce the issue since all the outputs have the same instructions in their .text regions (attached below).
Could you please give a sample to reproduce this issue? Or is this bug has been fixed(https://bugs.llvm.org/show_bug.cgi?id=37240)?
Best,
Xiang
00000000004004f4 :
4004f4: d10043ff sub sp, sp, #0x10
4004f8: f90007e0 str x0, [sp, #8]
4004fc: 910043ff add sp, sp, #0x10
400500: d65f03c0 ret
0000000000400504 :
400504: d10043ff sub sp, sp, #0x10
400508: f90007e0 str x0, [sp, #8]
40050c: f90003e1 str x1, [sp]
400510: 910043ff add sp, sp, #0x10
400514: d65f03c0 ret
0000000000400518 :
400518: a9bf7bfd stp x29, x30, [sp, #-16]!
40051c: 910003fd mov x29, sp
400520: 90000000 adrp x0, 400000 <_init-0x388>
400524: 91146000 add x0, x0, #0x518
400528: 97fffff3 bl 4004f4
40052c: 90000000 adrp x0, 400000 <_init-0x388>
400530: 91188000 add x0, x0, #0x620
400534: 90000001 adrp x1, 400000 <_init-0x388>
400538: 9113d021 add x1, x1, #0x4f4
40053c: 97fffff2 bl 400504
400540: 17fffffb b 40052c <a+0x14>
0000000000400544 :
400544: d10083ff sub sp, sp, #0x20
400548: a9017bfd stp x29, x30, [sp, #16]
40054c: 910043fd add x29, sp, #0x10
400550: 2a1f03e8 mov w8, wzr
400554: b81fc3bf stur wzr, [x29, #-4]
400558: b9000be8 str w8, [sp, #8]
400560: b9400be0 ldr w0, [sp, #8]
400564: a9417bfd ldp x29, x30, [sp, #16]
400568: 910083ff add sp, sp, #0x20
40056c: d65f03c0 ret