Closed TatyanaDoubts closed 4 months ago
To reproduce run the following test with -passes slp-vectorizer -slp-threshold=-99999
; 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 double @wombat() #0 gc "statepoint-example" { bb: br i1 false, label %bb1, label %bb2 bb1: ; preds = %bb br i1 false, label %bb14, label %bb11 bb2: ; preds = %bb9, %bb %phi = phi i32 [ 0, %bb9 ], [ 0, %bb ] %phi3 = phi i32 [ 0, %bb9 ], [ 0, %bb ] %phi4 = phi i32 [ 0, %bb9 ], [ 0, %bb ] %phi5 = phi i32 [ 0, %bb9 ], [ 0, %bb ] br i1 false, label %bb6, label %bb11 bb6: ; preds = %bb2 br i1 false, label %bb7, label %bb14 bb7: ; preds = %bb6 %zext = zext i32 %phi4 to i64 %zext8 = zext i32 %phi to i64 %icmp = icmp ult i64 %zext, %zext8 br label %bb17 bb9: ; No predecessors! br label %bb2 bb10: ; No predecessors! br label %bb17 bb11: ; preds = %bb2, %bb1 %phi12 = phi i32 [ 0, %bb1 ], [ %phi3, %bb2 ] %phi13 = phi i32 [ 0, %bb1 ], [ %phi5, %bb2 ] br label %bb20 bb14: ; preds = %bb6, %bb1 %phi15 = phi i32 [ %phi, %bb6 ], [ 0, %bb1 ] %phi16 = phi i32 [ %phi4, %bb6 ], [ 0, %bb1 ] br label %bb20 bb17: ; preds = %bb10, %bb7 %phi18 = phi i64 [ %zext, %bb7 ], [ 0, %bb10 ] %phi19 = phi i64 [ 0, %bb7 ], [ 0, %bb10 ] br label %bb20 bb20: ; preds = %bb17, %bb14, %bb11 ret double 0.000000e+00 }
Reproducer: https://godbolt.org/z/eY7nsqG97 Stack dump:
PHI nodes not grouped at top of basic block! %2 = phi <2 x i32> [ poison, %bb9 ], [ zeroinitializer, %bb ] label %bb2 LLVM ERROR: Broken module found, compilation aborted! PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace. Stack dump: 0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/opt -o /app/output.s -S -passes slp-vectorizer -slp-threshold=-99999 <source> #0 0x0000000004d50ef8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4d50ef8) #1 0x0000000004d4e64c SignalHandler(int) Signals.cpp:0:0 #2 0x00007430bee42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #3 0x00007430bee969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc) #4 0x00007430bee42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476) #5 0x00007430bee287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3) #6 0x00000000007aa2c7 llvm::json::operator==(llvm::json::Value const&, llvm::json::Value const&) (.cold) JSON.cpp:0:0 #7 0x0000000004c92718 (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4c92718) #8 0x0000000004b9b013 (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4b9b013) #9 0x00000000008c0f9e llvm::detail::PassModel<llvm::Module, llvm::VerifierPass, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8c0f9e) #10 0x0000000004b5e93c llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x4b5e93c) #11 0x00000000008cba52 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) (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8cba52) #12 0x00000000008bf2a5 optMain (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8bf2a5) #13 0x00007430bee29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90) #14 0x00007430bee29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40) #15 0x00000000008b604e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/opt+0x8b604e) Program terminated with signal: SIGSEGV Compiler returned: 139
cc @alexey-bataev
Fixed in 5e67c41a932256e047ae093ae4f7f5a53df1527d
To reproduce run the following test with -passes slp-vectorizer -slp-threshold=-99999
Reproducer: https://godbolt.org/z/eY7nsqG97 Stack dump: