[LLVMbugs] [Bug 22900] New: CodeExtractor is not debug intrinsic aware

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Mar 13 17:36:18 PDT 2015


            Bug ID: 22900
           Summary: CodeExtractor is not debug intrinsic aware
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Transformation Utilities
          Assignee: unassignedbugs at nondot.org
          Reporter: tabloid.adroit at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14042
  --> https://llvm.org/bugs/attachment.cgi?id=14042&action=edit
should cause verification fail

opt -instcombine -loop-extract -S DbgIntrinsics.ll

dbg.declare is close to its first use, but the alloca is always in the function
entry block. Singe alloca is not a use of one dbg.declare, Code extractor
generates wrong code.
Similar things happen to dbg.value especially after instcombiner does

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