The return type of a function follows the signext attribute.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241315 91177308-0d34-0410-b5e6-96231b3b80d8

Test case trap-fnattr.cpp was failng on clang-ppc64-elf-linux2 because ppc64
sign-extends the i32 return value.
 
This is a follow-up to r241306.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241314 91177308-0d34-0410-b5e6-96231b3b80d8

This is needed to use clang's command line option "-ftrap-function" for LTO and
enable changing the trap function name on a per-call-site basis.

rdar://problem/21225723

Differential Revision: http://reviews.llvm.org/D10831


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241306 91177308-0d34-0410-b5e6-96231b3b80d8