[llvm-bugs] [Bug 45396] New: clang hangs when compiling SPEC CPU 2017 600.perlbench_s, 602.gcc_s, 623.xalancbmk_s, 625.x264_s

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45396

            Bug ID: 45396
           Summary: clang hangs when compiling SPEC CPU 2017
                    600.perlbench_s, 602.gcc_s, 623.xalancbmk_s,
                    625.x264_s
           Product: clang
           Version: trunk
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C
          Assignee: unassignedclangbugs at nondot.org
          Reporter: elodiezhou0574 at gmail.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

In 600.perlbench_s, it hangs when compiling sv.c. 
Optimization used was -Ofast. 
Started from following commit: 
b670ab7b6b3d2f26179213be1da1d4ba376f50a3 | yaxun.liu at amd.com | 23 Mar 2020
16:09:07 GMT

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