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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/103226] [12 Regression] Recent change to
 copy-headers causes execution failure for gcc.dg/torture/pr80974
Date: Wed, 17 Nov 2021 19:26:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103226

--- Comment #17 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
The .s files on my cross versus the AWS instance or not even remotely the s=
ame:

--- j.s 2021-11-17 14:13:19.979883609 -0500
+++ j.s.bad     2021-11-17 14:13:12.083828127 -0500
@@ -5,79 +5,78 @@
 .global _main;
 .type _main, STT_FUNC;
 _main:
-       P2.H =3D _b;
-       [--sp] =3D ( r7:7, p5:3 );
+       [--sp] =3D ( p5:3 );

+       P2.H =3D _b;
+       [--SP] =3D FP;
        P2.L =3D _b;
-       R2 =3D [P2];
-       P1.H =3D _a;
-       cc =3DR2=3D=3D0;
-       P1.L =3D _a;
+       R0 =3D [P2];
+       P0.H =3D _a;
+       cc =3DR0=3D=3D0;
+       P0.L =3D _a;
        if !cc jump .L2;
-       P4.H =3D _f;
-       P3.H =3D _e;
-       P5.H =3D _d;
-       P4.L =3D _f;

etc
etc.

Except for the --with-newlib, the GCC configure lines look similar:

Configured with: /home/aldyh/src/gcc/configure --target=3Dbfin-elf
--enable-languages=3Dc --with-newlib --prefix=3D/home/aldyh/bld/bfin/instal=
l/
Configured with: /home/jenkins/gcc/configure --prefix=3D/home/jenkins/insta=
lled
--target=3Dbfin-elf

Is there some sort of default -mcpu flag that is different?

Anywhoo...I'll continue working on this tomorrow since copying the AWS .s f=
ile
and compiling it on my cross also exhibits the broken behavior... so there's
clearly something there.=