[Bug lto/107030] Emitted binary code changes when -g is enabled at -O2 -flto and optimize attribute

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107030

Richard Biener  changed:

   What|Removed |Added

   Last reconfirmed||2022-09-26
   Keywords||compare-debug-failure
 Ever confirmed|0   |1
 Status|UNCONFIRMED |NEW

--- Comment #3 from Richard Biener  ---
The difference is that with -g 'd' is not emitted:

@@ -46,10 +57,217 @@
.size   a, 4
 a:
.zero   4
-   .align 8
-   .type   d, @object
-   .size   d, 8
-d:
-   .zero   8
+   .text
+.Letext0:
+   .section.debug_info,"",@progbits

with just -fwhole-program but without -flto 'd' is emitted in both cases.

[Bug lto/107030] Emitted binary code changes when -g is enabled at -O2 -flto and optimize attribute

[schwab--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107030

--- Comment #2 from Andreas Schwab  ---
But -g is supposed to never change the generated code.

[Bug lto/107030] Emitted binary code changes when -g is enabled at -O2 -flto and optimize attribute

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107030

--- Comment #1 from Andrew Pinski  ---
I doubt this is a bug.
The difference is in the got.
If anything the got is slightly different.