diff options
Diffstat (limited to 'lib/Checker/CheckDeadStores.cpp')
| -rw-r--r-- | lib/Checker/CheckDeadStores.cpp | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/lib/Checker/CheckDeadStores.cpp b/lib/Checker/CheckDeadStores.cpp index 31f9390..d6ea187 100644 --- a/lib/Checker/CheckDeadStores.cpp +++ b/lib/Checker/CheckDeadStores.cpp @@ -220,16 +220,25 @@ public: if (E->isConstantInitializer(Ctx)) return; - // Special case: check for initializations from constant - // variables. - // - // e.g. extern const int MyConstant; - // int x = MyConstant; - // if (DeclRefExpr *DRE=dyn_cast<DeclRefExpr>(E->IgnoreParenCasts())) - if (VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) + if (VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) { + // Special case: check for initialization from constant + // variables. + // + // e.g. extern const int MyConstant; + // int x = MyConstant; + // if (VD->hasGlobalStorage() && - VD->getType().isConstQualified()) return; + VD->getType().isConstQualified()) + return; + // Special case: check for initialization from scalar + // parameters. This is often a form of defensive + // programming. Non-scalars are still an error since + // because it more likely represents an actual algorithmic + // bug. + if (isa<ParmVarDecl>(VD) && VD->getType()->isScalarType()) + return; + } Report(V, DeadInit, V->getLocation(), E->getSourceRange()); } |
