[LLVMbugs] [Bug 21906] New: Assertion failed: ExitBlockSet.count(ExitBlock) && "The LCSSA PHI is not in an exit block!"

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Dec 12 23:08:25 PST 2014


            Bug ID: 21906
           Summary: Assertion failed: ExitBlockSet.count(ExitBlock) &&
                    "The LCSSA PHI is not in an exit block!"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: patrik.h.hagglund at ericsson.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13536
  --> http://llvm.org/bugs/attachment.cgi?id=13536&action=edit

This bug is present on r224187, and seems to be introduced by r215343.

bin/opt -S -instcombine -simplifycfg -inline -sroa -early-cse -jump-threading
-instcombine -licm -gvn -simplifycfg csmith-461848576.ll
opt: ../lib/Transforms/Scalar/LICM.cpp:613: void (anonymous
namespace)::LICM::sink(llvm::Instruction &): Assertion
`ExitBlockSet.count(ExitBlock) && "The LCSSA PHI is not in an exit block!"'
0  opt             0x0000000001382be8 llvm::sys::PrintStackTrace(_IO_FILE*) +
1  opt             0x00000000013841cb
2  libpthread.so.0 0x00007f77ab37a810
3  libc.so.6       0x00007f77aab95755 gsignal + 53
4  libc.so.6       0x00007f77aab96d31 abort + 385
5  libc.so.6       0x00007f77aab8e610 __assert_fail + 240
6  opt             0x0000000001269540
7  opt             0x00000000012677e5
8  opt             0x0000000001267433
9  opt             0x0000000001265e32
10 opt             0x0000000000cb15cd
llvm::LPPassManager::runOnFunction(llvm::Function&) + 1085
11 opt             0x000000000104b69b
llvm::FPPassManager::runOnFunction(llvm::Function&) + 539
12 opt             0x000000000108f7a9
13 opt             0x000000000104be87
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 967
14 opt             0x00000000005b83e9 main + 6345
15 libc.so.6       0x00007f77aab81c16 __libc_start_main + 230
16 opt             0x00000000005a5f55
Stack dump:
0.      Program arguments: bin/opt -S -instcombine -simplifycfg -inline -sroa
-early-cse -jump-threading -instcombine -licm -gvn -simplifycfg
1.      Running pass 'CallGraph Pass Manager' on module 'csmith-461848576.ll'.
2.      Running pass 'Loop Pass Manager' on function '@fn1'
3.      Running pass 'Loop Invariant Code Motion' on basic block '%for.cond'
Abort (core dumped)

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