LegUp Crash

The following C code was found to crash LegUp 4.0 and 7.5.

./bug.c

int a[2][2][1] = {{{0},{1}},{{0},{0}}};

int main() { a[0][1][0] = 1; }

To reproduce the bug, it has to point to the main Makefile in the examples folder in LegUp (LEGUP_EXAMPLES).

./Makefile

NAME := bug
NO_INLINE := 1
LEGUP_EXAMPLES := ..
include $(LEGUP_EXAMPLES)/Makefile.common

Then the bug can be reproduced by running make, which returns the following assertion error.

make >/dev/null

llc: utils.cpp:453: unsigned int legup::getBitWidth(const llvm::Type*): Assertion `size > 0' failed.
0  llc             0x0000564d07ac55b2 llvm::sys::PrintStackTrace(_IO_FILE*) + 34
1  llc             0x0000564d07ac4da4
2  libpthread.so.0 0x00007fef25e5b730
3  libc.so.6       0x00007fef259127bb gsignal + 267
4  libc.so.6       0x00007fef258fd535 abort + 289
5  libc.so.6       0x00007fef258fd40f
6  libc.so.6       0x00007fef2590b102
7  llc             0x0000564d06b79571
8  llc             0x0000564d06b723bf legup::RAM::initializeArray(llvm::Constant const*) + 3487
9  llc             0x0000564d06b73268 legup::RAM::initialize() + 88
10 llc             0x0000564d06b73491 legup::RAM::buildInitializer() + 65
11 llc             0x0000564d06b7354d legup::RAM::generateMIFContent(llvm::raw_fd_ostream&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) + 45
12 llc             0x0000564d06c8bfd9 legup::VerilogWriter::printMIFFiles() + 1049
13 llc             0x0000564d06c8c185 legup::VerilogWriter::printMemoryController() + 37
14 llc             0x0000564d06c8c574 legup::VerilogWriter::print() + 484
15 llc             0x0000564d06bfd877 legup::LegupPass::printVerilog(std::set<llvm::Function const*, std::less<llvm::Function const*>, std::allocator<llvm::Function const*> > const&) + 1031
16 llc             0x0000564d06bfe8c3 legup::LegupPass::doFinalization(llvm::Module&) + 3091
17 llc             0x0000564d079d718c llvm::legacy::PassManagerImpl::run(llvm::Module&) + 972
18 llc             0x0000564d06b37380
19 llc             0x0000564d06b19a20 main + 368
20 libc.so.6       0x00007fef258ff09b __libc_start_main + 235
21 llc             0x0000564d06b319ca _start + 42
Stack dump:
0.      Program arguments: ../../llvm/Release+Asserts/bin/llc -legup-config=../legup.tcl -march=v loop.bc -o loop.v
make: *** [../Makefile.common:132: all] Aborted