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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/100453] [12 Regression] wrong code at -O1 and
 above since r12-434
Date: Fri, 14 May 2021 16:24:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100453

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Martin, did you test Ada with your patch?  It appears that it either causes
bootstrap to fail (PR bootstrap/100597) or miscompiles the Ada compiler:

                =3D=3D=3D acats tests =3D=3D=3D
FAIL:   c41325a
FAIL:   c45347d
FAIL:   c74402a
FAIL:   c95085m
FAIL:   cc3601a

                =3D=3D=3D acats Summary =3D=3D=3D
# of expected passes            2323
# of unexpected failures        5
Native configuration is x86_64-suse-linux-gnu

                =3D=3D=3D gnat tests =3D=3D=3D


Running target unix
FAIL: gnat.dg/addr12.adb (test for excess errors)
UNRESOLVED: gnat.dg/addr12.adb compilation failed to produce executable
FAIL: gnat.dg/addr12_a.adb (test for excess errors)
FAIL: gnat.dg/bip_overlay.adb (test for excess errors)
FAIL: gnat.dg/global.adb (test for excess errors)
FAIL: gnat.dg/spark1.adb  (test for errors, line 8)
FAIL: gnat.dg/spark1.adb (test for excess errors)
FAIL: gnat.dg/sync2.adb (test for excess errors)
FAIL: gnat.dg/synchronized1.adb (test for excess errors)

                =3D=3D=3D gnat Summary =3D=3D=3D

# of expected passes            3360
# of unexpected failures        8
# of expected failures          23
# of unresolved testcases       1
# of unsupported tests          3


Most parameters are read-only in Ada so it's quite a good testbed...=