[LLVMdev] funny llvm bug

Serge Pavlov sepavloff at gmail.com
Fri Apr 19 02:38:20 PDT 2013

This is a feature (or bug) of MCSectionELF::PrintSwitchToSection. For
ELF target this function tries to escape string if it founds
'suspicious' character, see implementation in MCSectionELF.cpp:

  StringRef name = getSectionName();
  if (name.find_first_not_of("0123456789_."
                             "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == name.npos) {
    OS << "\t.section\t" << name;
  } else {
    OS << "\t.section\t\"";

As section "name" is something like .mySection,\"aw\", at progbits# ,
this method puts all the string in quotes.
Other targets (COFF and MachO) doesn't have such treatment.

If looks like the code that transforms section names should be
removed. Does anybody know what this transformation is for?

2013/4/19 Joerg Sonnenberger <joerg at britannica.bec.de>:
> On Thu, Apr 18, 2013 at 06:57:29PM -0700, reed kotler wrote:
>> I'm going to file this bug but it's kind of a blocker for me so
>> maybe someone has time
>> to look at it. Should be nearly trivial to fix.
> I don't think this is a bug, but a misfeature in GCC due to the way it
> does (non-)escaping.
> Joerg
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