JonPsson
commented
4 years ago SystemZ reduced test case I saw the same assert on SystemZ:
clang -cc1 -triple s390x-ibm-linux -S -O3 -w -mllvm -enable-simple-loop-unswitch -mllvm -jump-threading-across-loop-headers -faddrsig -o out.s -x ir tc_bb2isntsucc.ll
llvm-project/llvm/lib/Analysis/LazyValueInfo.cpp:1393: bool getEdgeValueLocal(llvm::Value, llvm::BasicBlock, llvm::BasicBlock *, llvm::ValueLatticeElement&): Assertion `BI->getSuccessor(!isTrueDest) == BBTo && "BBTo isn't a successor of BBFrom"' failed.
rotateright
Extended Description
Though the assert message of this bug is the same as bug 35801, the reason of this bug maybe different from bug 35801, since one developer pointed out that bug 35801 is a bug in NewGVN.
$clang -v clang version 9.0.0 (trunk 363125) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0 Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8 Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0 Candidate multilib: .;@m64 Candidate multilib: 32;@m32 Candidate multilib: x32;@mx32 Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
opt -slp-vectorizer -lowerswitch -loop-rotate -sroa -jump-threading -scalarizer -break-crit-edges -correlated-propagation small.bc -o small-opt.bc opt: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Analysis/LazyValueInfo.cpp:1338: bool getEdgeValueLocal(llvm::Value, llvm::BasicBlock, llvm::BasicBlock*, llvm::ValueLatticeElement&): Assertion `BI->getSuccessor(!isTrueDest) == BBTo && "BBTo isn't a successor of BBFrom"' failed. Stack dump:
0 0x0000555d46c2887a llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x257887a)
1 0x0000555d46c26534 llvm::sys::RunSignalHandlers() (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576534)
2 0x0000555d46c26672 SignalHandler(int) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576672)
3 0x00007ff520c52890 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
4 0x00007ff51f904e97 raise /build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
5 0x00007ff51f906801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
6 0x00007ff51f8f639a __assert_fail_base /build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
7 0x00007ff51f8f6412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
8 0x0000555d45f5fab8 (anonymous namespace)::LazyValueInfoImpl::getEdgeValue(llvm::Value, llvm::BasicBlock, llvm::BasicBlock, llvm::ValueLatticeElement&, llvm::Instruction) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x18afab8)
9 0x0000555d45f611b8 (anonymous namespace)::LazyValueInfoImpl::solve() (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x18b11b8)
10 0x0000555d45f633d8 (anonymous namespace)::LazyValueInfoImpl::getValueOnEdge(llvm::Value, llvm::BasicBlock, llvm::BasicBlock, llvm::Instruction) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x18b33d8)
11 0x0000555d45f63538 llvm::LazyValueInfo::getConstantOnEdge(llvm::Value, llvm::BasicBlock, llvm::BasicBlock, llvm::Instruction) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x18b3538)
12 0x0000555d4696fbf6 runImpl(llvm::Function&, llvm::LazyValueInfo, llvm::DominatorTree, llvm::SimplifyQuery const&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x22bfbf6)
13 0x0000555d46971aa5 (anonymous namespace)::CorrelatedValuePropagation::runOnFunction(llvm::Function&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x22c1aa5)
14 0x0000555d465e1189 llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f31189)
15 0x0000555d465e1281 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f31281)
16 0x0000555d465e03e1 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f303e1)
17 0x0000555d44ec90a9 main (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x8190a9)
18 0x00007ff51f8e7b97 __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
19 0x0000555d44f4e3fa _start (/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x89e3fa)
Aborted (core dumped)
int a, d, e, f; unsigned b; short c; int g() { long h[] = {4, 4, 4, 4, 4}; j: b = -6; for (; b < 9;) { int i = 0; for (; i < 6; i++) for (; c;) { if (a) goto j; return d; } if (f) { long k = &h[2]; k = 0; } else goto j; } return e; }