[LLVMbugs] [Bug 22621] New: Itanium ABI: mangling issue with external names in template args (gcc vs. ABI)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22621

            Bug ID: 22621
           Summary: Itanium ABI: mangling issue with external names in
                    template args (gcc vs. ABI)
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: Wolfgang_Pieb at playstation.sony.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The following example from the ABI (5.1.5)

void foo(char) {}
template <void (&)(char)> struct CB {};
void bar(CB<foo> cb) {}

produces the following mangling for bar():

_Z3bar2CBILZ3foocEE

According to the ABI the 'Z' in the middle is supposed to be
preceded by an underscore, foo being a name with external linkage.

There's a FIXME comment in CXXNameMangler::mangleTemplateArg() in
ItaniumMangle.cpp saying that gcc leaves out the underscore. This
is why clang does so, too.

Is the priority to conform to the ABI or to be as compatible with
gcc as possible?

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20150217/ab29ba65/attachment.html>