[Bug 216117] clang 4.0.0 crashes trying to build lld on i386

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216117

Dimitry Andric <dim at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dim at FreeBSD.org

--- Comment #4 from Dimitry Andric <dim at FreeBSD.org> ---
Hm, yes, I'm seeing this too, while building llvm38 even.  Something is rotten,
but it's hard to figure out what.  For some reason, a cleanly built release_40
r292009 on universe12a.f.o works fine, but on my local system, it doesn't.

I'm trying valgrind to figure out what is going wrong, and it gives me:

==1793== Invalid read of size 8
==1793==    at 0x227C9BE: llvm::ValueHandleBase::AddToUseList() (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x29A3F2D:
llvm::AssumptionCache::AffectedValueCallbackVH::allUsesReplacedWith(llvm::Value*)
(in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x227A884: llvm::ValueHandleBase::ValueIsRAUWd(llvm::Value*,
llvm::Value*) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x227A504: llvm::Value::doRAUW(llvm::Value*, bool) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C9791E:
llvm::sroa::AllocaSliceRewriter::visitLoadInst(llvm::LoadInst&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C880FD: llvm::sroa::AllocaSliceRewriter::visit((anonymous
namespace)::Slice const*) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C86C9A: llvm::SROA::rewritePartition(llvm::AllocaInst&,
llvm::sroa::AllocaSlices&, llvm::sroa::Partition&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C88584: llvm::SROA::splitAlloca(llvm::AllocaInst&,
llvm::sroa::AllocaSlices&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C89A1D: llvm::SROA::runOnAlloca(llvm::AllocaInst&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C8B309: llvm::SROA::runImpl(llvm::Function&,
llvm::DominatorTree&, llvm::AssumptionCache&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C9C239:
llvm::sroa::SROALegacyPass::runOnFunction(llvm::Function&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x22B78D9: llvm::FPPassManager::runOnFunction(llvm::Function&)
(in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==  Address 0x5a5a5a5a5a5a5a62 is not stack'd, malloc'd or (recently)
free'd
==1793==
pid 1793 (memcheck-amd64-free): sigreturn rflags = 0x4
==1793==
==1793== Process terminating with default action of signal 10 (SIGBUS): dumping
core
==1793==  Hardware error at address 0x40F7A495F
==1793==    at 0x227C9BE: llvm::ValueHandleBase::AddToUseList() (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x29A3F2D:
llvm::AssumptionCache::AffectedValueCallbackVH::allUsesReplacedWith(llvm::Value*)
(in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x227A884: llvm::ValueHandleBase::ValueIsRAUWd(llvm::Value*,
llvm::Value*) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x227A504: llvm::Value::doRAUW(llvm::Value*, bool) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C9791E:
llvm::sroa::AllocaSliceRewriter::visitLoadInst(llvm::LoadInst&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C880FD: llvm::sroa::AllocaSliceRewriter::visit((anonymous
namespace)::Slice const*) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C86C9A: llvm::SROA::rewritePartition(llvm::AllocaInst&,
llvm::sroa::AllocaSlices&, llvm::sroa::Partition&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C88584: llvm::SROA::splitAlloca(llvm::AllocaInst&,
llvm::sroa::AllocaSlices&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C89A1D: llvm::SROA::runOnAlloca(llvm::AllocaInst&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C8B309: llvm::SROA::runImpl(llvm::Function&,
llvm::DominatorTree&, llvm::AssumptionCache&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x1C9C239:
llvm::sroa::SROALegacyPass::runOnFunction(llvm::Function&) (in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)
==1793==    by 0x22B78D9: llvm::FPPassManager::runOnFunction(llvm::Function&)
(in
/usr/obj/share/dim/src/freebsd/base/projects/clang400-import/usr.bin/clang/clang/clang.full)

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