[RISCV][GISel] fatal error: error in backend: Cannot implicitly convert a scalable size to a fixed-width size #167618
Description
Code from #166613 caused fatal error with -fglobal-isel:
#include "riscv_vector.h"
char b;
int i;
int a();
#define c() 0
void h() {
{
long d = 1, g;
int e = a(), f = __builtin_rvv_vsetvli(e + d, 3, 0);
__riscv_vle8ff_v_i8m1(&b, &g, f);
}
{
a();
int f = __builtin_rvv_vsetvli(1, 3, 0);
long g;
__riscv_vle8ff_v_i8m1(&b, &g, f);
}
i ? a() : c();
}Compiler explorer: https://godbolt.org/z/7o3o3831T
Error:
fatal error: error in backend: Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`Backtrace:
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang -g -o /app/output.s -fno-verbose-asm -S -target riscv64-unknown-linux-gnu -march=rv64gc -mabi=lp64d --gcc-toolchain=/opt/compiler-explorer/riscv64/gcc-8.2.0/riscv64-unknown-linux-gnu --sysroot=/opt/compiler-explorer/riscv64/gcc-8.2.0/riscv64-unknown-linux-gnu/riscv64-unknown-linux-gnu/sysroot -fcolor-diagnostics -fno-crash-diagnostics --target=riscv64-unknown-linux-gnu -march=rv64gcv -mabi=lp64d -menable-experimental-extensions -O2 -fglobal-isel <source>
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module '<source>'.
4. Running pass 'IRTranslator' on function '@h'
#0 0x0000000003d25608 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d25608)
#1 0x0000000003d22fdc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d22fdc)
#2 0x0000000003c69283 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c69283)
#3 0x0000000003d1a81e llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d1a81e)
#4 0x0000000000de0f8b LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
#5 0x0000000003c734e3 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c734e3)
#6 0x0000000003c73679 (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c73679)
#7 0x0000000002f31373 (/opt/compiler-explorer/clang-trunk/bin/clang+0x2f31373)
#8 0x0000000004fae46e llvm::IRTranslator::getOrCreateVRegs(llvm::Value const&) (.part.0) IRTranslator.cpp:0:0
#9 0x0000000004faeee1 llvm::IRTranslator::getOrCreateVRegs(llvm::Value const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4faeee1)
#10 0x0000000004fbea3d llvm::IRTranslator::translateIntrinsic(llvm::CallBase const&, unsigned int, llvm::MachineIRBuilder&, llvm::TargetLoweringBase::IntrinsicInfo const*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4fbea3d)
#11 0x0000000004fc45da llvm::IRTranslator::translateCall(llvm::User const&, llvm::MachineIRBuilder&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4fc45da)
#12 0x0000000004fc7445 llvm::IRTranslator::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4fc7445)
#13 0x0000000003101b0d llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3101b0d)
#14 0x0000000003675ee2 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3675ee2)
#15 0x0000000003676171 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3676171)
#16 0x0000000003677a53 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3677a53)
#17 0x0000000003fc2b12 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fc2b12)
#18 0x00000000045fb6db clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x45fb6db)
#19 0x000000000627cd9c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x627cd9c)
#20 0x00000000045fc235 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+0x45fc235)
#21 0x00000000048fb3fa clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+0x48fb3fa)
#22 0x000000000487aa7b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x487aa7b)
#23 0x00000000049f2b0b clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x49f2b0b)
#24 0x0000000000de2fe5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+0xde2fe5)
#25 0x0000000000ddaf4b ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#26 0x0000000000ddafed int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#27 0x000000000466a4c9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#28 0x0000000003c69183 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c69183)
#29 0x000000000466a6e9 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#30 0x000000000462d2e2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x462d2e2)
#31 0x000000000462e1c1 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x462e1c1)
#32 0x000000000463706c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x463706c)
#33 0x0000000000ddfa19 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0xddfa19)
#34 0x0000000000c89a24 main (/opt/compiler-explorer/clang-trunk/bin/clang+0xc89a24)
#35 0x000079e395c29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#36 0x000079e395c29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#37 0x0000000000dda9e5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+0xdda9e5)