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Subject: [Bug middle-end/98689] [11 Regression] FAIL:
 gcc.dg/torture/stackalign/builtin-return-1.c   -O1  execution test
Date: Sat, 06 Mar 2021 21:41:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98689

--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 50320
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D50320&action=3Dedit
.s diff to gcc10 .s

The following code is wrong in gcc-11:

-       ldw 12(%r3),%r28
+       ldw 12(%r3),%r5
+       copy %r5,%r28
        bl foo,%r2
        ldo 64(%r3),%r4
-       stw %r28,0(%r4)
+       stw %r5,0(%r4)

In gcc-10, the return value from foo is stored in 0(%r4).=