[LLVMbugs] [Bug 9389] New: opt -reassociate produces invalid IR

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Mar 3 04:58:10 PST 2011


           Summary: opt -reassociate produces invalid IR
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: miscompilation
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matti.niemenmaa+llvmbugs at iki.fi
                CC: llvmbugs at cs.uiuc.edu

Created an attachment (id=6264)
 --> (http://llvm.org/bugs/attachment.cgi?id=6264)
Test case

With opt from r126934:

$ opt -S -reassociate < bugpoint-reduced-simplified.ll
Instruction does not dominate all uses!
  %tmp2 = add i64 undef, undef
  %m0 = add i64 %tmp2, undef
Instruction does not dominate all uses!
  %m0 = add i64 %tmp2, undef
  %qs = add i64 %m0, %tmp2
Broken module found, compilation aborted!
Stack dump:
0.    Program arguments: /home/deewiant/src/llvm/install/bin/opt -reassociate
1.    Running pass 'Function Pass Manager' on module '<stdin>'.
2.    Running pass 'Module Verifier' on function '@Main_r_info'

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