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Allow aliases to be unnamed_addr.

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Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210302 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-06-06 01:20:28 +00:00
parent bbd34136f3
commit 6fd1b8ee48
20 changed files with 75 additions and 53 deletions
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2
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -1988,6 +1988,8 @@ error_code BitcodeReader::ParseModule(bool Resume) {
UpgradeDLLImportExportLinkage(NewGA, Record[2]);
if (Record.size() > 5)
NewGA->setThreadLocalMode(GetDecodedThreadLocalMode(Record[5]));
if (Record.size() > 6)
NewGA->setUnnamedAddr(Record[6]);
ValueList.push_back(NewGA);
AliasInits.push_back(std::make_pair(NewGA, Record[1]));
break;