block IRgen - Fixes a crash when determining if given block variable

is captured by a given statement expression. // rdar://10001085

llvm-svn: 138314

Author: Fariborz Jahanian

clang/lib/CodeGen/CGDecl.cpp

@@ -875,6 +875,9 @@ static bool isCapturedBy(const VarDecl &var, const Expr *e) {
     return false;
   }
 
+  if (const StmtExpr *SE = dyn_cast<StmtExpr>(e))
+    e = cast<Expr>(SE->getSubStmt()->body_back());
+    
   for (Stmt::const_child_range children = e->children(); children; ++children)
     if (isCapturedBy(var, cast<Expr>(*children)))
       return true;

clang/test/CodeGen/block-3.c

@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - -fblocks -triple x86_64-apple-darwin10 
+// rdar://10001085
+
+int main() {
+  ^{
+                __attribute__((__blocks__(byref))) int index = ({ int __a; int __b; __a < __b ? __b : __a; });
+   };
+}