[cfe-commits] r138314 - in /cfe/trunk: lib/CodeGen/CGDecl.cpp test/CodeGen/block-3.c

Eli Friedman eli.friedman at gmail.com
Mon Aug 22 19:59:04 CDT 2011


On Mon, Aug 22, 2011 at 5:27 PM, Fariborz Jahanian <fjahanian at apple.com> wrote:
> Author: fjahanian
> Date: Mon Aug 22 19:27:49 2011
> New Revision: 138314
>
> URL: http://llvm.org/viewvc/llvm-project?rev=138314&view=rev
> Log:
> block IRgen - Fixes a crash when determining if given block variable
> is captured by a given statement expression. // rdar://10001085
>
> Added:
>    cfe/trunk/test/CodeGen/block-3.c
> Modified:
>    cfe/trunk/lib/CodeGen/CGDecl.cpp
>
> Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=138314&r1=138313&r2=138314&view=diff
> ==============================================================================
> --- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
> +++ cfe/trunk/lib/CodeGen/CGDecl.cpp Mon Aug 22 19:27:49 2011
> @@ -875,6 +875,9 @@
>     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;

SE->getSubStmt()->body_back() isn't guaranteed to be an Expr here.
Also, don't you need to check the other substatements?

-Eli



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