Linking Cruft Doesn't Help

[llvmbot]

Bugzilla Link	976
Resolution	INVALID
Resolved on	Mar 06, 2010 14:00
Version	trunk
OS	Linux
Attachments	Bugpoint details
Reporter	LLVM Bugzilla Contributor

Extended Description

Test Case:
; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout = "e-p:32:32"
target endian = little
target pointersize = 32
target triple = "i686-pc-linux-gnu"
module asm "\09.section\09.fini"
module asm "\09call __do_global_dtors_aux"
module asm "\09.text"

implementation ; Functions:

void %__do_global_dtors_aux() {
entry:
ret void
}

[llvmbot]

Stack Trace:
#​0 0x0012c402 in __kernel_vsyscall ()
#​1 0x00321ee9 in raise () from /lib/libc.so.6
#​2 0x003234f1 in abort () from /lib/libc.so.6
#​3 0x0031b859 in __assert_fail () from /lib/libc.so.6
#​4 0x085f5679 in llvm::cast<llvm::CondCodeSDNode, llvm::SDOperand>
(Val=@0x9a29718) at /proj/llvm/llvm-2/include/llvm/Support/Casting.h:199
#​5 0x08658619 in (anonymous namespace)::DAGCombiner::visitBR_CC
(this=0xbfbb2ca0, N=0x9a29e38) at DAGCombiner.cpp:2681
#​6 0x0864b452 in (anonymous namespace)::DAGCombiner::visit (this=0xbfbb2ca0,
N=0x9a29e38) at DAGCombiner.cpp:530
#​7 0x0864aa82 in (anonymous namespace)::DAGCombiner::Run (this=0xbfbb2ca0,
RunningAfterLegalize=false) at DAGCombiner.cpp:428
#​8 0x0865fd42 in llvm::SelectionDAG::Combine (this=0xbfbb2fa0,
RunningAfterLegalize=false, AA=@0x9a373d0) at DAGCombiner.cpp:4187
#​9 0x0862bf84 in llvm::SelectionDAGISel::CodeGenAndEmitDAG (this=0x9a37890,
DAG=@0xbfbb2fa0) at SelectionDAGISel.cpp:3866
#​10 0x0862c181 in llvm::SelectionDAGISel::SelectBasicBlock (this=0x9a37890,
LLVMBB= 0x9a44ea0, MF=@0x9a29940, FuncInfo=@0xbfbb30b0) at SelectionDAGISel.cpp:3903
#​11 0x0862a8ed in llvm::SelectionDAGISel::runOnFunction (this=0x9a37890,
Fn=@0x9a44d08) at SelectionDAGISel.cpp:3612
#​12 0x085f392d in (anonymous namespace)::X86DAGToDAGISel::runOnFunction
(this=0x9a37890, Fn=@0x9a44d08) at X86ISelDAGToDAG.cpp:124
#​13 0x088604cf in llvm::FunctionPassManagerT::runPass (this=0x9a37278,
P=0x9a37890, F=0x9a44d08) at PassManagerT.h:804
#​14 0x0885edf6 in llvm::PassManagerTllvm::FTraits::runPasses (this=0x9a37290,
M=0x9a44d08, LastUserOf=@0xbfbb3260) at PassManagerT.h:596
#​15 0x0885ecab in llvm::PassManagerTllvm::FTraits::runOnUnit (this=0x9a37290,
M=0x9a44d08) at PassManagerT.h:282
#​16 0x0886056d in llvm::FunctionPassManagerT::runOnFunction (this=0x9a37278,
F=@0x9a44d08) at PassManagerT.h:896
#​17 0x0884d1d1 in llvm::FunctionPassManager::run (this=0x9a1f320, F=@0x9a44d08)
at Pass.cpp:110
#​18 0x0833e953 in llvm_asm_file_end () at
/proj/llvm/llvm-2/include/llvm/ADT/ilist:119
#​19 0x0830eec0 in toplev_main (argc=0, argv=0x893fd7d) at
../../src-2/gcc/toplev.c:1166
#​20 0x080ba4ce in main (argc=0, argv=0x0) at ../../src-2/gcc/llvm-main.cpp:37

[lattner]

LLC produces this output for me, are you sure it's failing? :)

Start of file scope inline assembly

    .section        .fini
    call __do_global_dtors_aux
    .text

End of file scope inline assembly

.text
.align 16
.globl __do_global_dtors_aux
__do_global_dtors_aux:
ret
.size __do_global_dtors_aux, .-__do_global_dtors_aux

[llvmbot]

Symptom:

llc: /proj/llvm/llvm2/include/llvm/CodeGen/MachineInstr.h:285: const
llvm::MachineOperand& llvm::MachineInstr::getOperand(unsigned int) const:
Assertion `i < getNumOperands() && "getOperand() out of range!"' failed.

However, when compiling llvm-gcc, this shows up as:

llc: /proj/llvm/llvm-2/include/llvm/Support/Casting.h:199: typename
llvm::cast_retty<To, From>::ret_type llvm::cast(const Y&) [with X =
llvm::CondCodeSDNode, Y = llvm::SDOperand]: Assertion `isa(Val) &&
"cast() argument of incompatible type!"' failed.

[lattner]

That failure is non-sensical. That code is only reachable when there is a branch in the input, there is no
branch in the .ll file.

[llvmbot]

This is looking like its a local failure of llc.

[llvmbot]

Turns out a 100% clean rebuild fixed this. sigh