[Bug tree-optimization/114403] [14 regression] LLVM miscompiled with -O3 -march=znver2 -fno-vect-cost-model

["sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114403

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
Better output (includes the assertion failure):
```
$ /home/sam/data/build/llvm-project-test/bin/llc -global-isel
-mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o -
/home/sam/git/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
llc: /home/sam/git/llvm-project/llvm/include/llvm/ADT/ScopedHashTable.h:243:
llvm::ScopedHashTableScope<K, V, KInfo, AllocatorTy>::~ScopedHashTableScope()
[with K = {anonymous}::CallValue; V = std::pair<llvm::Instruction*, unsigned
int>; KInfo = llvm::DenseMapInfo<{anonymous}::CallValue>; AllocatorTy =
llvm::MallocAllocator]: Assertion `HT.TopLevelMap[ThisEntry->getKey()] ==
ThisEntry && "Scope imbalance!"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and
include the crash backtrace.
Stack dump:
0.      Program arguments: /home/sam/data/build/llvm-project-test/bin/llc
-global-isel -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -stop-after=legalizer -o
-
/home/sam/git/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll
1.      Running pass 'Function Pass Manager' on module
'/home/sam/git/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-llvm.amdgcn.image.sample.a16.ll'.
2.      Running pass 'Early CSE' on function '@sample_d_2d'
 #0 0x00007f1df2a1709f llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
/home/sam/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:602:22
 #1 0x00007f1df2a1411b llvm::sys::RunSignalHandlers()
/home/sam/git/llvm-project/llvm/lib/Support/Signals.cpp:104:20
 #2 0x00007f1df2a1411b SignalHandler(int)
/home/sam/git/llvm-project/llvm/lib/Support/Unix/Signals.inc:403:31
 #3 0x00007f1df226ac10 (/usr/lib64/libc.so.6+0x3bc10)
 #4 0x00007f1df22c029c (/usr/lib64/libc.so.6+0x9129c)
 #5 0x00007f1df226ab62 raise (/usr/lib64/libc.so.6+0x3bb62)
 #6 0x00007f1df22534f0 abort (/usr/lib64/libc.so.6+0x244f0)
 #7 0x00007f1df2253418 (/usr/lib64/libc.so.6+0x24418)
 #8 0x00007f1df2263392 (/usr/lib64/libc.so.6+0x34392)
 #9 0x00007f1df412f794 ~ScopedHashTableScope
/home/sam/git/llvm-project/llvm/include/llvm/ADT/ScopedHashTable.h:243:7
#10 0x00007f1df412f794 ~ScopedHashTableScope
/home/sam/git/llvm-project/llvm/include/llvm/ADT/ScopedHashTable.h:235:1
#11 0x00007f1df412f794 ~NodeScope
/home/sam/git/llvm-project/llvm/lib/Transforms/Scalar/EarlyCSE.cpp:667:9
#12 0x00007f1df412f794 ~StackNode
/home/sam/git/llvm-project/llvm/lib/Transforms/Scalar/EarlyCSE.cpp:687:9
#13 0x00007f1df412f794 (anonymous namespace)::EarlyCSE::run()
/home/sam/git/llvm-project/llvm/lib/Transforms/Scalar/EarlyCSE.cpp:1708:14
#14 0x00007f1df4131085 (anonymous
namespace)::EarlyCSELegacyCommonPass<false>::runOnFunction(llvm::Function&)
/home/sam/git/llvm-project/llvm/lib/Transforms/Scalar/EarlyCSE.cpp:1782:3
#15 0x00007f1df2ee1291 llvm::FPPassManager::runOnFunction(llvm::Function&)
/home/sam/git/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1435:40
#16 0x00007f1df2ee179c llvm::ilist_node_base<false>::getNext() const
/home/sam/git/llvm-project/llvm/include/llvm/ADT/ilist_node_base.h:29:45
#17 0x00007f1df2ee179c
llvm::ilist_node_impl<llvm::ilist_detail::node_options<llvm::Function, false,
false, void>>::getNext()
/home/sam/git/llvm-project/llvm/include/llvm/ADT/ilist_node.h:67:66
#18 0x00007f1df2ee179c
llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Function, false,
false, void>, false, false>::operator++()
/home/sam/git/llvm-project/llvm/include/llvm/ADT/ilist_iterator.h:157:25
#19 0x00007f1df2ee179c llvm::FPPassManager::runOnModule(llvm::Module&)
/home/sam/git/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1480:22
#20 0x00007f1df2ee1f5d runOnModule
/home/sam/git/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:1557:7
#21 0x00007f1df2ee1f5d llvm::legacy::PassManagerImpl::run(llvm::Module&)
/home/sam/git/llvm-project/llvm/lib/IR/LegacyPassManager.cpp:535:55
#22 0x000055c1916feb5b compileModule(char**, llvm::LLVMContext&)
/home/sam/git/llvm-project/llvm/tools/llc/llc.cpp:754:66
#23 0x000055c1916f3753 main
/home/sam/git/llvm-project/llvm/tools/llc/llc.cpp:416:5
#24 0x00007f1df2254e58 (/usr/lib64/libc.so.6+0x25e58)
#25 0x00007f1df2254f15 __libc_start_main (/usr/lib64/libc.so.6+0x25f15)
#26 0x000055c1916f3d01 _start
(/home/sam/data/build/llvm-project-test/bin/llc+0x10d01)
Aborted
```