[llvm-bugs] [Bug 30257] New: Nary Reassociate pass takes too long on simple programs

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30257

            Bug ID: 30257
           Summary: Nary Reassociate pass takes too long on simple
                    programs
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: tstellar at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17209
  --> https://llvm.org/bugs/attachment.cgi?id=17209&action=edit
Reduced Tetst Case

The reduced tests cases is from the same larger test case as
https://llvm.org/bugs/show_bug.cgi?id=28721.  I suspect they have the same root
cause.

To reproduce:
opt -nary-reassociate -mtriple=amdgcn--amdhsa -mcpu=fiji -debug-pass=Executions
 nary-reassociate-long-compile.ll -o - -S

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