Add doxygen comments and simplify expression.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@76955 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CFG.cpp b/lib/Analysis/CFG.cpp
index af64fb8..217df45 100644
--- a/lib/Analysis/CFG.cpp
+++ b/lib/Analysis/CFG.cpp
@@ -135,6 +135,11 @@
bool FinishBlock(CFGBlock* B);
CFGBlock *addStmt(Stmt *S) { return Visit(S, true); }
+
+ /// TryResult - a class representing a variant over the values
+ /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool,
+ /// and is used by the CFGBuilder to decide if a branch condition
+ /// can be decided up front during CFG construction.
class TryResult {
int X;
public:
@@ -155,7 +160,7 @@
TryResult TryEvaluateBool(Expr *S) {
Expr::EvalResult Result;
if (S->Evaluate(Result, *Context) && Result.Val.isInt())
- return Result.Val.getInt().getBoolValue() ? true : false;
+ return Result.Val.getInt().getBoolValue();
return TryResult();
}