[llvm-bugs] [Bug 37382] New: Assertion failure generating thumbv6 code: -- Assertion `TLI.isTypeLegal(HalfType)' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37382

            Bug ID: 37382
           Summary: Assertion failure generating thumbv6 code: --
                    Assertion `TLI.isTypeLegal(HalfType)' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: alex at crichton.co
                CC: llvm-bugs at lists.llvm.org

Created attachment 20273
  --> https://bugs.llvm.org/attachment.cgi?id=20273&action=edit
IR

When attempting to compile the attached IR (reduced with bugpoint) with `llc`
it yields:




$ llc foo.ll -filetype=obj -O0
llc:
/home/alex/code/rust2/src/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:3432:
bool {anonymous}::SelectionDAGLegalize::ExpandNode(llvm::SDNode*): Assertion
`TLI.isTypeLegal(HalfType)' failed.
Stack dump:
0.      Program arguments: ./build/x86_64-unknown-linux-gnu/llvm/bin/llc
-filetype=obj -O0 bugpoint-reduced-simplified.ll 
1.      Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.ll'.
2.      Running pass 'ARM Instruction Selection' on function
'@_ZN3lib3ptr19swap_nonoverlapping17he2ab85414b948373E'
#0 0x00007f202a6e7dda llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x8f8dda)
#1 0x00007f202a6e5b7e llvm::sys::RunSignalHandlers()
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x8f6b7e)
#2 0x00007f202a6e5cf2 SignalHandler(int)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x8f6cf2)
#3 0x00007f20296d84b0 (/lib/x86_64-linux-gnu/libc.so.6+0x354b0)
#4 0x00007f20296d8428 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x35428)
#5 0x00007f20296da02a abort (/lib/x86_64-linux-gnu/libc.so.6+0x3702a)
#6 0x00007f20296d0bd7 (/lib/x86_64-linux-gnu/libc.so.6+0x2dbd7)
#7 0x00007f20296d0c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
#8 0x00007f202acc83a2 (anonymous
namespace)::SelectionDAGLegalize::ExpandNode(llvm::SDNode*)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xed93a2)
#9 0x00007f202acb5041 (anonymous
namespace)::SelectionDAGLegalize::LegalizeOp(llvm::SDNode*) (.part.276)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xec6041)
#10 0x00007f202acc8952 llvm::SelectionDAG::Legalize()
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xed9952)
#11 0x00007f202adee224 llvm::SelectionDAGISel::CodeGenAndEmitDAG()
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xfff224)
#12 0x00007f202adf3e6a
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x1004e6a)
#13 0x00007f202adf608c
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(.part.875.constprop.898)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x100708c)
#14 0x00007f202bdc79d4 (anonymous
namespace)::ARMDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0x1fd89d4)
#15 0x00007f202a9fc375
llvm::MachineFunctionPass::runOnFunction(llvm::Function&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xc0d375)
#16 0x00007f202a7f4403 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xa05403)
#17 0x00007f202a7f44cc llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xa054cc)
#18 0x00007f202a7f3f6d llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/alex/code/rust2/build/x86_64-unknown-linux-gnu/llvm/bin/../lib/libLLVM-7svn.so+0xa04f6d)
#19 0x00000000004196a0 compileModule(char**, llvm::LLVMContext&)
(.constprop.391) (./build/x86_64-unknown-linux-gnu/llvm/bin/llc+0x4196a0)
#20 0x000000000040c266 main
(./build/x86_64-unknown-linux-gnu/llvm/bin/llc+0x40c266)
#21 0x00007f20296c3830 __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x20830)
#22 0x000000000040c409 _start
(./build/x86_64-unknown-linux-gnu/llvm/bin/llc+0x40c409)

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