InstrProf: Mark code regions after throw expressions as unreachable

We weren't setting regions as being unreachable after C++ throw
expressions, leading to incorrect count propagations.

llvm-svn: 235967

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenPGO.cpp b/clang/lib/CodeGen/CodeGenPGO.cpp
index acc392a0e18..27e4c7fc091 100644
--- a/clang/lib/CodeGen/CodeGenPGO.cpp
+++ b/clang/lib/CodeGen/CodeGenPGO.cpp
@@ -317,6 +317,14 @@ struct ComputeRegionCounts : public ConstStmtVisitor<ComputeRegionCounts> {
     RecordNextStmtCount = true;
   }
 
+  void VisitCXXThrowExpr(const CXXThrowExpr *E) {
+    RecordStmtCount(E);
+    if (E->getSubExpr())
+      Visit(E->getSubExpr());
+    PGO.setCurrentRegionUnreachable();
+    RecordNextStmtCount = true;
+  }
+
   void VisitGotoStmt(const GotoStmt *S) {
     RecordStmtCount(S);
     PGO.setCurrentRegionUnreachable();