faust2 segfaults with LLVM 3.5

faust2 compiled with LLVM 3.5 on Arch Linux. Here's what I get if I try to compile examples/reverb/freeverb.dsp to bitcode:

$ faust -double -lang llvm freeverb.dsp -o freeverb.bc
Segmentation fault (core dumped)

gdb backtrace:

#0  0x000000000058f986 in llvm::DataLayout::isLittleEndian (this=0x0)
    at /usr/include/llvm/IR/DataLayout.h:209
#1  llvm::DataLayout::operator= (DL=..., this=0x1b17d70)
    at /usr/include/llvm/IR/DataLayout.h:191
#2  llvm::DataLayout::DataLayout (DL=..., this=0x1b17d70)
    at /usr/include/llvm/IR/DataLayout.h:187
#3  LLVMTypeInstVisitor::LLVMTypeInstVisitor (prefix=..., 
    module=<optimized out>, 
    __vtt_parm=0x947ff0 <VTT for LLVMTypeInstVisitor1+8>, this=0x7fffffffdb50, 
    __in_chrg=<optimized out>) at generator/llvm/llvm_instructions.hh:586
#4  LLVMTypeInstVisitor1::LLVMTypeInstVisitor1 (prefix=..., 
    module=<optimized out>, this=0x7fffffffdb50, __in_chrg=<optimized out>, 
    __vtt_parm=<optimized out>) at generator/llvm/llvm_instructions.hh:766
#5  LLVMCodeContainer::produceFactory (this=0x199f1f0)
    at generator/llvm/llvm_code_container.cpp:721
#6  0x000000000067dab3 in generateCode (generate=true, 
    numOutputs=<optimized out>, numInputs=<optimized out>, 
    signals=0x7fffec5d77f0, this=<optimized out>) at libcode.cpp:974
#7  compile_faust_internal (argc=argc@entry=7, argv=argv@entry=0x7fffffffe7b8, 
    name=name@entry=0x6bdec2 "FaustDSP", dsp_content=dsp_content@entry=0x0, 
    generate=generate@entry=true) at libcode.cpp:1188
#8  0x000000000067ef81 in compile_faust_factory (argc=7, argv=0x7fffffffe7b8, 
    name=name@entry=0x6bdec2 "FaustDSP", dsp_content=dsp_content@entry=0x0, 
    error_msg="", generate=generate@entry=true) at libcode.cpp:1205
#9  0x0000000000674aa9 in main (argc=<optimized out>, argv=<optimized out>)
    at main.cpp:35

This example still works with LLVM 3.5 using an old snapshot (rev. 33009c4) of faust2 from sf2 git, so this is most likely a regression that recently got introduced with all the latest changes.

Note that the latest faust2 also compiles this file ok when using LLVM 3.9. But for compatibility with Pure I really need this to work with LLVM 3.5 as well. Pure is still stuck at this version right now, since LLVM 3.5 is the last version that still has the old (non-MC) JIT.

grame-cncm / faust

faust2 segfaults with LLVM 3.5 #15