[PATCH] D95518: [Debug-Info][XCOFF] support dwarf for XCOFF for assembly output

[Jason Liu via Phabricator via llvm-commits]

jasonliu added inline comments.


================
Comment at: llvm/test/DebugInfo/XCOFF/empty.ll:9
+target datalayout = "E-m:a-p:32:32-i64:64-n32"
+
+; Function Attrs: noinline nounwind optnone
----------------
So I tried a simple program with this patch:
```
(gdb) list
1       int bar2() {return 1;}
2       int  main() {
3         int c = 10;
4         return bar2()+c;
5       }
(gdb) b 3
Breakpoint 1 at 0x100004d8: file /gsa/tlbgsa/home/j/a/jasonli/defect/XCOFF/main.c, line 3.
(gdb) r
Starting program: /gsa/tlbgsa-h1/06/jasonli/defect/XCOFF/main 

Breakpoint 1, main () at /gsa/tlbgsa/home/j/a/jasonli/defect/XCOFF/main.c:3
3         int c = 10;
(gdb) n
4         return bar2()+c;
(gdb) s
bar2 () at /gsa/tlbgsa/home/j/a/jasonli/defect/XCOFF/main.c:1
1       int bar2() {return 1;}
(gdb) n
0x100002fc in __start ()
```
It seems when we try the last "next", it skips the `main` function and goes directly into `__start()`. But gcc on AIX seems to be able to advance to `main` before goes to `__start()`. 


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D95518/new/

https://reviews.llvm.org/D95518