| Issue |
128158
|
| Summary |
[SDAG] Assertion `NumBits >= MIN_INT_BITS && "bitwidth too small"' failed.
|
| Labels |
crash-on-valid,
llvm:SelectionDAG
|
| Assignees |
dtcxzyw
|
| Reporter |
dtcxzyw
|
Reproducer: https://godbolt.org/z/76no4o4cM
```
; bin/llc test.ll -o -
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @main(i64 %retval.sroa.0.0.copyload.i.i.pre) {
entry:
br label %for.body.i
for.body.i: ; preds = %for.body.i, %entry
%0 = add i64 %retval.sroa.0.0.copyload.i.i.pre, -4294967296
%tobool.not.not.i.i = icmp ult i64 %0, 38654705664
br i1 %tobool.not.not.i.i, label %for.body.i, label %for.cond6.preheader.i.i
for.cond6.preheader.i.i: ; preds = %for.body.i
ret i32 0
}
```
```
llc: /data/zyw/llvm-project/llvm/lib/IR/Type.cpp:312: static llvm::IntegerType* llvm::IntegerType::get(llvm::LLVMContext&, unsigned int): Assertion `NumBits >= MIN_INT_BITS && "bitwidth too small"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: ../llvm-build/bin/llc reduced.ll
1. Running pass 'Function Pass Manager' on module 'reduced.ll'.
2. Running pass 'X86 DAG->DAG Instruction Selection' on function '@main'
#0 0x00007ffff3bf09c2 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/data/zyw/llvm-build/bin/../lib/libLLVMSupport.so.21.0git+0x1f09c2)
#1 0x00007ffff3bedb5f llvm::sys::RunSignalHandlers() (/data/zyw/llvm-build/bin/../lib/libLLVMSupport.so.21.0git+0x1edb5f)
#2 0x00007ffff3bedca4 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007ffff3242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007ffff32969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007ffff3242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007ffff32287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007ffff322871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007ffff3239e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00007ffff4125abd llvm::IntegerType::get(llvm::LLVMContext&, unsigned int) (/data/zyw/llvm-build/bin/../lib/libLLVMCore.so.21.0git+0x325abd)
#10 0x00007ffff61c362d llvm::EVT::getExtendedIntegerVT(llvm::LLVMContext&, unsigned int) (/data/zyw/llvm-build/bin/../lib/libLLVMCodeGen.so.21.0git+0x7c362d)
#11 0x00007ffff78af4cb combineTruncate(llvm::SDNode*, llvm::SelectionDAG&, llvm::X86Subtarget const&) X86ISelLowering.cpp:0:0
#12 0x00007ffff67335c1 (anonymous namespace)::DAGCombiner::combine(llvm::SDNode*) DAGCombiner.cpp:0:0
#13 0x00007ffff6734ff4 (anonymous namespace)::DAGCombiner::Run(llvm::CombineLevel) DAGCombiner.cpp:0:0
#14 0x00007ffff673794d llvm::SelectionDAG::Combine(llvm::CombineLevel, llvm::BatchAAResults*, llvm::CodeGenOptLevel) (/data/zyw/llvm-build/bin/../lib/libLLVMSelectionDAG.so.21.0git+0x13794d)
#15 0x00007ffff699fae2 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/data/zyw/llvm-build/bin/../lib/libLLVMSelectionDAG.so.21.0git+0x39fae2)
#16 0x00007ffff69a328c llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/data/zyw/llvm-build/bin/../lib/libLLVMSelectionDAG.so.21.0git+0x3a328c)
#17 0x00007ffff69a4aa9 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/data/zyw/llvm-build/bin/../lib/libLLVMSelectionDAG.so.21.0git+0x3a4aa9)
#18 0x00007ffff6994e37 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/data/zyw/llvm-build/bin/../lib/libLLVMSelectionDAG.so.21.0git+0x394e37)
#19 0x00007ffff5e01ed5 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#20 0x00007ffff40a6d11 llvm::FPPassManager::runOnFunction(llvm::Function&) (/data/zyw/llvm-build/bin/../lib/libLLVMCore.so.21.0git+0x2a6d11)
#21 0x00007ffff40a6ef1 llvm::FPPassManager::runOnModule(llvm::Module&) (/data/zyw/llvm-build/bin/../lib/libLLVMCore.so.21.0git+0x2a6ef1)
#22 0x00007ffff40a78b3 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/data/zyw/llvm-build/bin/../lib/libLLVMCore.so.21.0git+0x2a78b3)
#23 0x000055555556f2e5 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#24 0x0000555555563507 main (../llvm-build/bin/llc+0xf507)
#25 0x00007ffff3229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#26 0x00007ffff3229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#27 0x00005555555642d5 _start (../llvm-build/bin/llc+0x102d5)
Aborted (core dumped)
```
llvm version: 6d5ba79c6604a6f66400d573b8aabc34cb75d0b5
It is a recent regression. I think it is not related with https://github.com/llvm/llvm-project/issues/128139.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
