[llvm-bugs] [Bug 36128] New: Assertion failure with `i128` and `returned`

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=36128

            Bug ID: 36128
           Summary: Assertion failure with `i128` and `returned`
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: WebAssembly
          Assignee: unassignedbugs at nondot.org
          Reporter: alex at crichton.co
                CC: dan433584 at gmail.com, llvm-bugs at lists.llvm.org

When generating an object via `llc`, this IR will cause an assertion to trip:



target triple = "wasm32-unknown-unknown-wasm"

declare i128 @bar(i128 returned)

define i128 @foo(i128) {
  %r = tail call i128 @bar(i128 %0)
  ret i128 %r
}




llc:
/home/alex/code/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:8247:
std::pair<llvm::SDValue, llvm::SDValue>
llvm::TargetLowering::LowerCallTo(llvm::TargetLowering::CallLoweringInfo&)
const: Assertion `CLI.RetTy == Args[i].Ty && RetTys.size() == NumValues &&
"unexpected use of 'returned'"' failed.
#0 0x00000000014424ba llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(./bin/llc+0x14424ba)
#1 0x000000000144025e llvm::sys::RunSignalHandlers() (./bin/llc+0x144025e)
#2 0x00000000014403d2 SignalHandler(int) (./bin/llc+0x14403d2)
#3 0x00007f07db9f6390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x00007f07da768428 gsignal
/build/glibc-bfm8X4/glibc-2.23/signal/../sysdeps/unix/sysv/linux/raise.c:54:0
#5 0x00007f07da76a02a abort /build/glibc-bfm8X4/glibc-2.23/stdlib/abort.c:91:0
#6 0x00007f07da760bd7 __assert_fail_base
/build/glibc-bfm8X4/glibc-2.23/assert/assert.c:92:0
#7 0x00007f07da760c82 (/lib/x86_64-linux-gnu/libc.so.6+0x2dc82)
#8 0x0000000001292bde
llvm::TargetLowering::LowerCallTo(llvm::TargetLowering::CallLoweringInfo&)
const (./bin/llc+0x1292bde)
#9 0x000000000129825c
llvm::SelectionDAGBuilder::lowerInvokable(llvm::TargetLowering::CallLoweringInfo&,
llvm::BasicBlock const*) (./bin/llc+0x129825c)
#10 0x00000000012ae8a5
llvm::SelectionDAGBuilder::LowerCallTo(llvm::ImmutableCallSite, llvm::SDValue,
bool, llvm::BasicBlock const*) (./bin/llc+0x12ae8a5)
#11 0x00000000012c0734 llvm::SelectionDAGBuilder::visitCall(llvm::CallInst
const&) (./bin/llc+0x12c0734)
#12 0x00000000012c7bc3 llvm::SelectionDAGBuilder::visit(llvm::Instruction
const&) (./bin/llc+0x12c7bc3)
#13 0x000000000130b359
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction,
true, false, void>, false, true>,
llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true,
false, void>, false, true>, bool&) (./bin/llc+0x130b359)
#14 0x00000000013156a8
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&)
(./bin/llc+0x13156a8)
#15 0x00000000013176cb
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) [clone
.part.879] [clone .constprop.905] (./bin/llc+0x13176cb)
#16 0x0000000000b780e5
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (./bin/llc+0xb780e5)
#17 0x0000000000ec0e93 llvm::FPPassManager::runOnFunction(llvm::Function&)
(./bin/llc+0xec0e93)
#18 0x0000000000ec0f5c llvm::FPPassManager::runOnModule(llvm::Module&)
(./bin/llc+0xec0f5c)
#19 0x0000000000ec09fd llvm::legacy::PassManagerImpl::run(llvm::Module&)
(./bin/llc+0xec09fd)
#20 0x000000000062dea0 compileModule(char**, llvm::LLVMContext&) [clone
.constprop.389] (./bin/llc+0x62dea0)
#21 0x00000000005eafe5 main (./bin/llc+0x5eafe5)
#22 0x00007f07da753830 __libc_start_main
/build/glibc-bfm8X4/glibc-2.23/csu/../csu/libc-start.c:325:0
#23 0x0000000000620f89 _start (./bin/llc+0x620f89)
Stack dump:
0.      Program arguments: ./bin/llc ../../rust4/lol/wut.ll -filetype=obj -O0
1.      Running pass 'Function Pass Manager' on module
'../../rust4/lol/wut.ll'.
2.      Running pass 'WebAssembly Instruction Selection' on function '@foo'
zsh: abort (core dumped)  ./bin/llc ../../rust4/lol/wut.ll -filetype=obj -O0

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