[llvm-bugs] [Bug 32285] New: ToT fails to compile LegalizeIntegerTypes with code coverage enabled

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=32285

            Bug ID: 32285
           Summary: ToT fails to compile LegalizeIntegerTypes with code
                    coverage enabled
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: vsk at apple.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18098
  --> https://bugs.llvm.org/attachment.cgi?id=18098&action=edit
Reduced *.ll reproducer

ToT hits an assertion failure when compiling LegalizeIntegerTypes.cpp with
clang-based code coverage. I am attaching some reproducers:

* bugpoint-reduced-simplified.ll (simply run with 'opt -O3')
* A traditional preprocessed source / repro script

I suspect the following patch is responsible:

https://reviews.llvm.org/D29540

Here is the backtrace:

Assertion failed: (Ty->isVectorTy() && "Can only scalarize vectors"), function
getScalarizationOverhead, file
/Users/vk/src/llvm.org-master/llvm/include/llvm/CodeGen/BasicTTIImpl.h, line
294.
4  libsystem_c.dylib        0x0000000104190f83 abort + 127
5  libsystem_c.dylib        0x00000001041596a6 basename_r + 0
6  opt                      0x0000000101caedc3
llvm::BasicTTIImplBase<llvm::X86TTIImpl>::getIntrinsicInstrCost(llvm::Intrinsic::ID,
llvm::Type*, llvm::ArrayRef<llvm::Value*>, llvm::FastMathFlags, unsigned int) +
1267
7  opt                      0x00000001022282dc
llvm::TargetTransformInfo::getIntrinsicInstrCost(llvm::Intrinsic::ID,
llvm::Type*, llvm::ArrayRef<llvm::Value*>, llvm::FastMathFlags, unsigned int)
const + 28
8  opt                      0x0000000102cdf678
getVectorIntrinsicCost(llvm::CallInst*, unsigned int, llvm::TargetTransformInfo
const&, llvm::TargetLibraryInfo const*) + 376
9  opt                      0x0000000102cde4d6 (anonymous
namespace)::LoopVectorizationCostModel::getInstructionCost(llvm::Instruction*,
unsigned int) + 3190
10 opt                      0x0000000102cdf92e (anonymous
namespace)::LoopVectorizationCostModel::expectedCost(unsigned int) + 222
11 opt                      0x0000000102cc33b9
llvm::LoopVectorizePass::processLoop(llvm::Loop*) + 11913
12 opt                      0x0000000102cce620
llvm::LoopVectorizePass::runImpl(llvm::Function&, llvm::ScalarEvolution&,
llvm::LoopInfo&, llvm::TargetTransformInfo&, llvm::DominatorTree&,
llvm::BlockFrequencyInfo&, llvm::TargetLibraryInfo*, llvm::DemandedBits&,
llvm::AAResults&, llvm::AssumptionCache&,
std::__1::function<llvm::LoopAccessInfo const& (llvm::Loop&)>&,
llvm::OptimizationRemarkEmitter&) + 528
13 opt                      0x0000000102ccfefc (anonymous
namespace)::LoopVectorize::runOnFunction(llvm::Function&) + 1196
14 opt                      0x0000000102657e7d
llvm::FPPassManager::runOnFunction(llvm::Function&) + 541
15 opt                      0x00000001026580e3
llvm::FPPassManager::runOnModule(llvm::Module&) + 51
16 opt                      0x000000010265862d
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 957

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