[llvm-bugs] [Bug 34279] New: Infinite loop during DAG building

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34279

            Bug ID: 34279
           Summary: Infinite loop during DAG building
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 19026
  --> https://bugs.llvm.org/attachment.cgi?id=19026&action=edit
reduced testcase

This is a test case that fails at -O2 but not on -O1 (Seg fault after 256
iterations somewhere).

bin/clang -cc1 -triple s390x-ibm-linux -S -target-cpu z13 -O2 -o /dev/null
./tc_iselcrash.ll

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