[LLVMbugs] [Bug 3426] New: lli fails cast assertion.

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3426

           Summary: lli fails cast assertion.
           Product: new-bugs
           Version: unspecified
          Platform: PC
               URL: http://shootout.alioth.debian.org/u32q/benchmark.php?tes
                    t=binarytrees&lang=gcc&id=5
        OS/Version: Linux
            Status: NEW
          Keywords: regression
          Severity: critical
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: micketeer at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Compiling and trying to run the bitcode of the binarytrees benchmark crashes
lli.

The following bitcode was compiled both with version 2.2 and 2.4 from Debian
unstable and experimental respectively.

$ lli -version
Low Level Virtual Machine (http://llvm.org/):
  llvm version 2.4 (Debian 2.4-1~exp1)
  Optimized build with assertions.

Compiling to a native binary with llvm-gcc works fine.
Using version 2.2 there was no errors (in fact lli was faster than gcc)
Step 1, compile
$ llvm-gcc binarytrees.c -emit-llvm -c -o binarytrees.bc

Step 2, run with a large input (for me, the limit is at 18, 17 and below works
and 18 and above crashes)
$ lli binarytrees.bc 18
stretch tree of depth 19         check: -1
lli: /build/buildd/llvm-2.4/include/llvm/Support/Casting.h:199: typename
llvm::cast_retty<To, From>::ret_type llvm::cast(const Y&) [with X =
llvm::Instruction, Y = llvm::User*]: Assertion `isa<X>(Val) && "cast<Ty>()
argument of incompatible type!"' failed.
lli[0x85972aa]
/lib/libc.so.6(abort+0x188)[0xb7d6dd78]
/lib/libc.so.6(__assert_fail+0xf0)[0xb7d65590]
lli[0x84b0a2b]
[0x9e69bc0]
[0xa]
Aborted

Running the file with the latest lli (from svn)
$ /usr/local/bin/lli binarytrees.bc 18
stretch tree of depth 19         check: -1
lli: /build/llvm/include/llvm/Support/Casting.h:199: typename
llvm::cast_retty<To, From>::ret_type llvm::cast(const Y&) [with X =
llvm::Instruction, Y = llvm::User*]: Assertion `isa<X>(Val) && "cast<Ty>()
argument of incompatible type!"' failed.
0   lli       0x08973066
1   lli       0x089733a8
2             0xb7f68400 __kernel_sigreturn + 0
3   libc.so.6 0xb7d05d78 abort + 392
4   libc.so.6 0xb7cfd590 __assert_fail + 240
5   lli       0x086510a7
6   lli       0x088163f5
7   lli       0x08816cf1
8   lli       0x08817de1
9   lli       0x089101ad llvm::FPPassManager::runOnFunction(llvm::Function&) +
249
10  lli       0x08910c22 llvm::FunctionPassManagerImpl::run(llvm::Function&) +
116
11  lli       0x08910d83 llvm::FunctionPassManager::run(llvm::Function&) + 137
12  lli       0x085b3f23 llvm::JIT::runJITOnFunction(llvm::Function*) + 119
13  lli       0x085b4315 llvm::JIT::getPointerToFunction(llvm::Function*) + 649
14  lli       0x085bd431
15  lli       0x0855b8f1 X86CompilationCallback2 + 142
16  lli       0x0855b529
17  lli       0xb6d57ffd
18  libc.so.6 0xb7da4bee clone + 94
Aborted


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