[LLVMbugs] [Bug 15262] New: ConstantFoldInstruction returns type with incorrect addrspace

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Feb 13 17:13:26 PST 2013


            Bug ID: 15262
           Summary: ConstantFoldInstruction returns type with incorrect
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Global Analyses
          Assignee: unassignedbugs at nondot.org
          Reporter: sschiffli at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 10014
  --> http://llvm.org/bugs/attachment.cgi?id=10014&action=edit
Failing .ll file

I'm seeing an assert from the InstructionCombining pass.  It attempts to fold
the following:

IC: ConstFold to: 
i8 addrspace(12)* getelementptr inbounds ([4 x i8] addrspace(12)* @buf,i32 0,
i32 2) 
%ptr = getelementptr inbounds i8* bitcast ([4 x i8] addrspace(12)* @buf to
i8*), i32 2

As you can see it changes the types and thus the RAUW fails.  To reproduce run
"opt -instcombine min.ll"

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