| Issue |
172049
|
| Summary |
crash with Floating point Exception (loop-vectorize pass)
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
TatyanaDoubts
|
To reproduce run opt with the following test (-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 ptr addrspace(1) @wombat() gc "statepoint-example" {
bb:
br label %bb2
bb1: ; preds = %bb6
ret ptr addrspace(1) null
bb2: ; preds = %bb6, %bb
%phi = phi i64 [ %add, %bb6 ], [ 0, %bb ]
br i1 false, label %bb3, label %bb6
bb3: ; preds = %bb2
br i1 false, label %bb4, label %bb5, !prof !0
bb4: ; preds = %bb3
br label %bb6
bb5: ; preds = %bb3
br label %bb6
bb6: ; preds = %bb5, %bb4, %bb2
%add = add i64 %phi, 1
%icmp = icmp eq i64 %phi, 0
br i1 %icmp, label %bb2, label %bb1
}
!0 = !{!"branch_weights", i32 1, i32 0}
```
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 0x0000000005a06d68 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x5a06d68)
#1 0x0000000005a03c14 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x0000752795e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x0000000003716a77 llvm::LoopVectorizationCostModel::expectedCost(llvm::ElementCount) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3716a77)
#4 0x0000000003725505 llvm::LoopVectorizationPlanner::computeBestVF() (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x3725505)
#5 0x00000000037297d9 llvm::LoopVectorizePass::processLoop(llvm::Loop*) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x37297d9)
#6 0x000000000372c3a0 llvm::LoopVectorizePass::runImpl(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x372c3a0)
#7 0x000000000372cb2d llvm::LoopVectorizePass::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x372cb2d)
#8 0x000000000300716e 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+0x300716e)
#9 0x00000000057e4471 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x57e4471)
#10 0x0000000000f0f07e 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+0xf0f07e)
#11 0x00000000057e2b3a llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x57e2b3a)
#12 0x00000000009793be 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+0x9793be)
#13 0x00000000057e24f1 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x57e24f1)
#14 0x00000000009836da 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+0x9836da)
#15 0x0000000000977578 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x977578)
#16 0x0000752795e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#17 0x0000752795e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#18 0x000000000096e025 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x96e025)
Program terminated with signal: SIGFPE
Compiler returned: 136
```
Reproducer: https://godbolt.org/z/3h4efaPbf
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