[r12-3142 Regression] FAIL: 20_util/enable_shared_from_this/89303.cc (test for excess errors) on Linux/x86_64

[sunil.k.pandey]

On Linux/x86_64,

5c85f29537662f1f4195a102cbf0182ffa32d8ac is the first bad commit
commit 5c85f29537662f1f4195a102cbf0182ffa32d8ac
Author: Jan Hubicka <hubicka@ucw.cz>
Date:   Wed Aug 25 21:43:07 2021 +0200

    Merge load/stores in ipa-modref summaries

caused

FAIL: 20_util/enable_shared_from_this/89303.cc (test for excess errors)
FAIL: g++.dg/torture/pr89303.C   -O1  (internal compiler error)
FAIL: g++.dg/torture/pr89303.C   -O1  (test for excess errors)

with GCC configured with



To reproduce:

$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check RUNTESTFLAGS="conformance.exp=20_util/enable_shared_from_this/89303.cc --target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check RUNTESTFLAGS="conformance.exp=20_util/enable_shared_from_this/89303.cc --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg-torture.exp=g++.dg/torture/pr89303.C --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg-torture.exp=g++.dg/torture/pr89303.C --target_board='unix{-m32\ -march=cascadelake}'"

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