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f165cf7ce8
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
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| .. | ||
| 2004-10-10-CastStoreOnce.ll | ||
| 2005-06-15-LocalizeConstExprCrash.ll | ||
| 2005-09-27-Crash.ll | ||
| 2006-07-07-InlineAsmCrash.ll | ||
| 2006-11-01-ShrinkGlobalPhiCrash.ll | ||
| 2007-04-05-Crash.ll | ||
| 2007-05-13-Crash.ll | ||
| 2007-06-04-PackedStruct.ll | ||
| 2007-11-09-GEP-GEP-Crash.ll | ||
| 2008-01-03-Crash.ll | ||
| 2008-01-13-OutOfRangeSROA.ll | ||
| 2008-01-29-VolatileGlobal.ll | ||
| 2008-04-26-SROA-Global-Align.ll | ||
| 2008-07-17-addrspace.ll | ||
| 2008-12-16-HeapSRACrash-2.ll | ||
| 2008-12-16-HeapSRACrash.ll | ||
| 2009-01-13-phi-user.ll | ||
| 2009-02-15-BitcastAlias.ll | ||
| 2009-02-15-ResolveAlias.ll | ||
| 2009-03-05-dbg.ll | ||
| 2009-03-06-Anonymous.ll | ||
| 2009-03-07-PromotePtrToBool.ll | ||
| 2009-06-01-RecursivePHI.ll | ||
| 2009-11-16-BrokenPerformHeapAllocSRoA.ll | ||
| 2009-11-16-MallocSingleStoreToGlobalVar.ll | ||
| 2010-02-25-MallocPromote.ll | ||
| 2010-02-26-MallocSROA.ll | ||
| 2010-10-19-WeakOdr.ll | ||
| 2011-04-09-EmptyGlobalCtors.ll | ||
| 2012-05-11-blockaddress.ll | ||
| alias-resolve.ll | ||
| alias-used-address-space.ll | ||
| alias-used-section.ll | ||
| alias-used.ll | ||
| array-elem-refs.ll | ||
| atexit.ll | ||
| atomic.ll | ||
| basictest.ll | ||
| blockaddress.ll | ||
| cleanup-pointer-root-users.ll | ||
| compiler-used.ll | ||
| constantexpr-dangle.ll | ||
| constantfold-initializers.ll | ||
| crash-2.ll | ||
| crash.ll | ||
| ctor-list-opt-constexpr.ll | ||
| ctor-list-opt-inbounds.ll | ||
| ctor-list-opt.ll | ||
| cxx-dtor.ll | ||
| deadfunction.ll | ||
| deadglobal-2.ll | ||
| deadglobal.ll | ||
| externally-initialized-global-ctr.ll | ||
| fastcc.ll | ||
| globalsra-partial.ll | ||
| globalsra-unknown-index.ll | ||
| globalsra.ll | ||
| heap-sra-1.ll | ||
| heap-sra-2.ll | ||
| heap-sra-3.ll | ||
| heap-sra-4.ll | ||
| heap-sra-phi.ll | ||
| integer-bool.ll | ||
| invariant-nodatalayout.ll | ||
| invariant.ll | ||
| invoke.ll | ||
| iterate.ll | ||
| load-store-global.ll | ||
| malloc-promote-1.ll | ||
| malloc-promote-2.ll | ||
| malloc-promote-3.ll | ||
| memcpy.ll | ||
| memset-null.ll | ||
| memset.ll | ||
| metadata.ll | ||
| phi-select.ll | ||
| storepointer-compare.ll | ||
| storepointer.ll | ||
| tls.ll | ||
| trivialstore.ll | ||
| undef-init.ll | ||
| unnamed-addr.ll | ||
| zeroinitializer-gep-load.ll | ||