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7dffb4905c
This reverts commit 2a0f2c5ef3330846149598220467d9f3c6e8b99c (r355490).
The commit causes an assertion failure when compiling LLVM code:
$ cat repro.cpp
class QQQ {
public:
bool x() const;
bool y() const;
unsigned getSizeInBits() const {
if (y() || x())
return getScalarSizeInBits();
return getScalarSizeInBits() * 2;
}
unsigned getScalarSizeInBits() const;
};
int f(const QQQ &Ty) {
switch (Ty.getSizeInBits()) {
case 1:
case 8:
return 0;
case 16:
return 1;
case 32:
return 2;
case 64:
return 3;
default:
__builtin_unreachable();
}
}
$ clang -O2 -o repro.o repro.cpp
assert.h assertion failed at llvm/include/llvm/ADT/ilist_iterator.h:139 in llvm::ilist_iterator::reference llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::MachineInstr, true, true, void>, true, false>::operator*() const [OptionsT = llvm::ilist_detail::node_options<llvm::MachineInstr, true, true, void>, IsReverse = true, IsConst = false]: !NodePtr->isKnownSentinel()
*** Check failure stack trace: ***
@ 0x558aab4afc10 __assert_fail
@ 0x558aa885479b llvm::ilist_iterator<>::operator*()
@ 0x558aa8854715 llvm::MachineInstrBundleIterator<>::operator*()
@ 0x558aa92c33c3 llvm::X86InstrInfo::optimizeCompareInstr()
@ 0x558aa9a9c251 (anonymous namespace)::PeepholeOptimizer::optimizeCmpInstr()
@ 0x558aa9a9b371 (anonymous namespace)::PeepholeOptimizer::runOnMachineFunction()
@ 0x558aa99a4fc8 llvm::MachineFunctionPass::runOnFunction()
@ 0x558aab019fc4 llvm::FPPassManager::runOnFunction()
@ 0x558aab01a3a5 llvm::FPPassManager::runOnModule()
@ 0x558aab01aa9b (anonymous namespace)::MPPassManager::runOnModule()
@ 0x558aab01a635 llvm::legacy::PassManagerImpl::run()
@ 0x558aab01afe1 llvm::legacy::PassManager::run()
@ 0x558aa5914769 (anonymous namespace)::EmitAssemblyHelper::EmitAssembly()
@ 0x558aa5910f44 clang::EmitBackendOutput()
@ 0x558aa5906135 clang::BackendConsumer::HandleTranslationUnit()
@ 0x558aa6d165ad clang::ParseAST()
@ 0x558aa6a94e22 clang::ASTFrontendAction::ExecuteAction()
@ 0x558aa590255d clang::CodeGenAction::ExecuteAction()
@ 0x558aa6a94840 clang::FrontendAction::Execute()
@ 0x558aa6a38cca clang::CompilerInstance::ExecuteAction()
@ 0x558aa4e2294b clang::ExecuteCompilerInvocation()
@ 0x558aa4df6200 cc1_main()
@ 0x558aa4e1b37f ExecuteCC1Tool()
@ 0x558aa4e1a725 main
@ 0x7ff20d56abbd __libc_start_main
@ 0x558aa4df51c9 _start
llvm-svn: 355515