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Excessive memory usage in SROA #142461

@vitalybuka

Description

@vitalybuka

It's exposed by #128504

test_rename_to_7z.zip

After unpacking use:
/usr/bin/time -v opt -passes='sroa<modify-cfg>' test_large.ll -o /dev/null

Result:
Maximum resident set size (kbytes): 34923396

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