[llvm-bugs] [Bug 44611] New: [JumpThreading] results in OOM

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Jan 21 16:02:08 PST 2020


            Bug ID: 44611
           Summary: [JumpThreading]  results in OOM
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 23044
  --> https://bugs.llvm.org/attachment.cgi?id=23044&action=edit
reduced testcase

With the option -jump-threading-across-loop-headers, this reduced program
consumes 16Gb of memory and is aborted. Without this option, opt returns 0
after 0.02s.

opt -mtriple=s390x-linux-gnu -O3 tc_jump_thread_OOM.ll

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