Rafael Espindola f165cf7ce8 Prevent alias from pointing to weak aliases. ... This adds back r204781. Original message: Aliases are just another name for a position in a file. As such, the regular symbol resolutions are not applied. For example, given define void @my_func() { ret void } @my_alias = alias weak void ()* @my_func @my_alias2 = alias void ()* @my_alias We produce without this patch: .weak my_alias my_alias = my_func .globl my_alias2 my_alias2 = my_alias That is, in the resulting ELF file my_alias, my_func and my_alias are just 3 names pointing to offset 0 of .text. That is *not* the semantics of IR linking. For example, linking in a @my_alias = alias void ()* @other_func would require the strong my_alias to override the weak one and my_alias2 would end up pointing to other_func. There is no way to represent that with aliases being just another name, so the best solution seems to be to just disallow it, converting a miscompile into an error. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204934 91177308-0d34-0410-b5e6-96231b3b80d8		2014-03-27 15:26:56 +00:00
..
AddressSanitizer.cpp	remove a bunch of unused private methods	2014-03-23 17:09:26 +00:00
BoundsChecking.cpp	remove a bunch of unused private methods	2014-03-23 17:09:26 +00:00
CMakeLists.txt
DataFlowSanitizer.cpp	Prevent alias from pointing to weak aliases.	2014-03-27 15:26:56 +00:00
DebugIR.cpp	[C++11] Change DebugInfoFinder to use range-based loops	2014-03-18 09:41:07 +00:00
DebugIR.h	Replace OwningPtr<T> with std::unique_ptr<T>.	2014-03-06 05:51:42 +00:00
GCOVProfiling.cpp	Cleanup whitespace	2014-03-11 02:44:45 +00:00
Instrumentation.cpp
LLVMBuild.txt
Makefile
MaximumSpanningTree.h
MemorySanitizer.cpp	[msan] More precise instrumentation of select IR.	2014-03-25 13:08:34 +00:00
ThreadSanitizer.cpp	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00