[Bug tree-optimization/97164] [8/9/10/11 Regression] incorrect offset on structure member where type of that member has aligned attribute

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97164

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With additional
--- libgcc/config/libbid/bid_functions.h.jj     2020-01-14 20:02:48.619582332
+0100
+++ libgcc/config/libbid/bid_functions.h        2020-09-23 01:12:02.672546190
+0200
@@ -81,7 +81,7 @@ ALIGN (16)
 #define SQRT80 sqrtw
 #endif

-     typedef ALIGN (16)
+     typedef ALIGN (8)
      struct {
        UINT64 w[3];
      } UINT192;
it bootstrapped on x86_64-linux, with
gcc.c-torture/execute/pr36093.c and gcc.c-torture/execute/pr43783.c tests that
use the same things regressing (guess they'd need to be removed).
Is libgcc always compiled with the new compiler rather than with system
compiler though?  If not, that might be a blocker for building older gcc
versions with the new one.