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Minor bug fixes to corner cases where LiveVariables would crash on some CFGs 

that contained no declarations, or when a variable is declared but never used.

llvm-svn: 41756
This commit is contained in:
Ted Kremenek 2007-09-06 23:25:10 +00:00
parent 1bb9f2596f
commit 10e7870746
1 changed files with 11 additions and 2 deletions
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13
clang/Analysis/LiveVariables.cpp
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@ -40,7 +40,9 @@ public:
void VisitStmt(Stmt* S);
void VisitDeclRefExpr(DeclRefExpr* DR);
void VisitDeclStmt(DeclStmt* DS);
void Register(Decl* D);
void RegisterDeclChain(Decl* D);
void RegisterUsedDecls();
};
@ -50,7 +52,15 @@ void RegisterDecls::VisitStmt(Stmt* S) {
}
void RegisterDecls::VisitDeclRefExpr(DeclRefExpr* DR) {
for (Decl* D = DR->getDecl() ; D != NULL ; D = D->getNextDeclarator())
RegisterDeclChain(DR->getDecl());
}
void RegisterDecls::VisitDeclStmt(DeclStmt* DS) {
RegisterDeclChain(DS->getDecl());
}
void RegisterDecls::RegisterDeclChain(Decl* D) {
for (; D != NULL ; D = D->getNextDeclarator())
Register(D);
}
@ -363,7 +373,6 @@ void LiveVariables::runOnCFG(const CFG& cfg, LiveVariablesAuditor* Auditor) {
void LiveVariables::runOnBlock(const CFGBlock* B, LiveVariablesAuditor* Auditor)
{
assert (NumDecls && "You must use runOnCFG before using runOnBlock.");
LivenessTFuncs TF(*this,Auditor);
TF.ProcessBlock(B);
}