[LLVMbugs] [Bug 1973] New: Fix for PR1942 causes miscompilation of clang

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Fri Feb 1 15:58:45 PST 2008


           Summary: Fix for PR1942 causes miscompilation of clang
           Product: tools
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Keywords: miscompilation
          Severity: normal
          Priority: P2
         Component: llvm-gcc
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org
                CC: llvmbugs at cs.uiuc.edu

The (second) fix for PR1942 causes llvm-gcc emit emit memcpy's of things with
ctors, this is very bad.  The -O0 .ll code compiled for
ends up constructing memtmp, memcpy'ing it to tmp1, then destroying tmp1.


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