| Issue |
183592
|
| Summary |
Assertion `(BestFactor.Width == LegacyVF.Width || BestPlan.hasEarlyExit() || ... && " VPlan cost model and legacy cost model disagreed"' failed.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
Full error message:
```
Assertion `(BestFactor.Width == LegacyVF.Width || BestPlan.hasEarlyExit() || !Legal->getLAI()->getSymbolicStrides().empty() || UsesEVLGatherScatter || planContainsAdditionalSimplifications( getPlanFor(BestFactor.Width), CostCtx, OrigLoop, BestFactor.Width) || planContainsAdditionalSimplifications( getPlanFor(LegacyVF.Width), CostCtx, OrigLoop, LegacyVF.Width)) && " VPlan cost model and legacy cost model disagreed"' failed.
```
To reproduce run opt with the test below, -passes=loop-vectorize:
```
; ModuleID = './reduced.ll'
source_filename = "./reduced.ll"
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-ni:1-p2:32:8:8:32-ni:2"
target triple = "x86_64-unknown-linux-gnu"
define i64 @wombat() gc "statepoint-example" {
bb:
br label %bb1
bb1: ; preds = %bb1, %bb
%phi = phi i64 [ %add, %bb1 ], [ 17, %bb ]
%add = add i64 %phi, -1
%getelementptr = getelementptr i32, ptr addrspace(1) null, i64 %phi
%getelementptr2 = getelementptr i8, ptr addrspace(1) %getelementptr, i64 4
%load = load i32, ptr addrspace(1) %getelementptr2, align 4
%trunc = trunc i64 %add to i32
%getelementptr3 = getelementptr i32, ptr addrspace(1) null, i64 %add
store i32 %trunc, ptr addrspace(1) %getelementptr3, align 4
%icmp = icmp eq i64 %phi, 0
br i1 %icmp, label %bb4, label %bb1
bb4: ; preds = %bb1
%phi5 = phi i32 [ %load, %bb1 ]
ret i64 0
}
```
Reproducer: https://godbolt.org/z/7T1baxTW5
Stack dump:
```
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes=loop-vectorize <source>
1. Running pass "function(loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>)" on module "<source>"
2. Running pass "loop-vectorize<no-interleave-forced-only;no-vectorize-forced-only;>" on function "wombat"
#0 0x0000000005bcdd68 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5bcdd68)
#1 0x0000000005bcab94 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x0000713926a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x0000713926a969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x0000713926a42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x0000713926a287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x0000713926a2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x0000713926a39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x00000000038391f8 llvm::LoopVectorizationPlanner::computeBestVF() (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x38391f8)
#9 0x000000000383dac3 llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x383dac3)
#10 0x0000000003840810 llvm::LoopVectorizePass::runImpl(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3840810)
#11 0x0000000003840f9d llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3840f9d)
#12 0x00000000030f994e llvm::detail::PassModel<llvm::Function, llvm::LoopVectorizePass, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x30f994e)
#13 0x0000000005938421 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5938421)
#14 0x0000000000f1887e llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0xf1887e)
#15 0x00000000059369da llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x59369da)
#16 0x000000000096e4fe llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x96e4fe)
#17 0x0000000005936391 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5936391)
#18 0x00000000009786ba llvm::runPassPipeline(llvm::StringRef, llvm::Module&, llvm::TargetMachine*, llvm::TargetLibraryInfoImpl*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::ToolOutputFile*, llvm::StringRef, llvm::ArrayRef<llvm::PassPlugin>, llvm::ArrayRef<std::function<void (llvm::PassBuilder&)>>, llvm::opt_tool::OutputKind, llvm::opt_tool::VerifierKind, bool, bool, bool, bool, bool, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x9786ba)
#19 0x000000000096c755 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x96c755)
#20 0x0000713926a29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#21 0x0000713926a29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#22 0x0000000000963435 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x963435)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
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