diff options
Diffstat (limited to 'lib/Analysis/RValues.cpp')
| -rw-r--r-- | lib/Analysis/RValues.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Analysis/RValues.cpp b/lib/Analysis/RValues.cpp index 60c349420a..ed3dba925e 100644 --- a/lib/Analysis/RValues.cpp +++ b/lib/Analysis/RValues.cpp @@ -55,6 +55,20 @@ RVal::symbol_iterator RVal::symbol_end() const { } //===----------------------------------------------------------------------===// +// Useful predicates. +//===----------------------------------------------------------------------===// + +bool RVal::isZeroConstant() const { + if (isa<lval::ConcreteInt>(*this)) + return cast<lval::ConcreteInt>(*this).getValue() == 0; + else if (isa<nonlval::ConcreteInt>(*this)) + return cast<nonlval::ConcreteInt>(*this).getValue() == 0; + else + return false; +} + + +//===----------------------------------------------------------------------===// // Transfer function dispatch for Non-LVals. //===----------------------------------------------------------------------===// |