From: Eli Friedman <eli.friedman@gmail.com>
Date: Sat, 26 Dec 2009 03:35:45 +0000 (+0000)
Subject: Don't look through casts when looking for the underlying decl for a function
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=efa42f7d88a33c0c00e571fbcba8032a9baf7088;p=clang

Don't look through casts when looking for the underlying decl for a function
call; the standard doesn't expect us to, and the program could be doing
something crazy.  Fixes PR5882.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92166 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 3df5b00cda..6438faea0a 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -3373,7 +3373,7 @@ Sema::ActOnCallExpr(Scope *S, ExprArg fn, SourceLocation LParenLoc,
   // Also, in C++, keep track of whether we should perform argument-dependent
   // lookup and whether there were any explicitly-specified template arguments.
 
-  Expr *NakedFn = Fn->IgnoreParenCasts();
+  Expr *NakedFn = Fn->IgnoreParens();
   if (isa<UnresolvedLookupExpr>(NakedFn)) {
     UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(NakedFn);
     return BuildOverloadedCallExpr(Fn, ULE, LParenLoc, Args, NumArgs,
diff --git a/test/CodeGen/func-ptr-cast-decl.c b/test/CodeGen/func-ptr-cast-decl.c
new file mode 100644
index 0000000000..e630796429
--- /dev/null
+++ b/test/CodeGen/func-ptr-cast-decl.c
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -emit-llvm-only %s -verify
+// PR5882
+
+int q_sk_num(void *a);
+typedef int (*fptr)(double);
+void a() { ((fptr)q_sk_num)(0); }