https://bugs.llvm.org/show_bug.cgi?id=44471
Bug ID: 44471
Summary: [SelectionDAG] OptLevelChanger::SavedFastISel
uninitialized variable warning
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: llvm-...@redking.me.uk
CC: llvm-bugs@lists.llvm.org, llvm-...@ndave.org,
paul_robin...@playstation.sony.com,
spatel+l...@rotateright.com
https://llvm.org/reports/scan-build/report-SelectionDAGISel.cpp-~OptLevelChanger-9-1.html#EndPath
OptLevelChanger(SelectionDAGISel &ISel,
CodeGenOpt::Level NewOptLevel) : IS(ISel) {
SavedOptLevel = IS.OptLevel;
if (NewOptLevel == SavedOptLevel)
return;
IS.OptLevel = NewOptLevel;
IS.TM.setOptLevel(NewOptLevel);
DEBUG(dbgs() << "\nChanging optimization level for Function "
<< IS.MF->getFunction()->getName() << "\n");
DEBUG(dbgs() << "\tBefore: -O" << SavedOptLevel
<< " ; After: -O" << NewOptLevel << "\n");
SavedFastISel = IS.TM.Options.EnableFastISel;
if (NewOptLevel == CodeGenOpt::None) {
IS.TM.setFastISel(IS.TM.getO0WantsFastISel());
DEBUG(dbgs() << "\tFastISel is "
<< (IS.TM.Options.EnableFastISel ? "enabled" : "disabled")
<< "\n");
}
}
Static analyzer has noticed that SavedFastISel is not initialized if the
"NewOptLevel == SavedOptLevel" warl out occurs.
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