[LLVMbugs] [Bug 16324] New: AVX issues / 'X86 DAG->DAG Instruction Selection' / core dumped

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Jun 13 13:44:47 PDT 2013


            Bug ID: 16324
           Summary: AVX issues / 'X86 DAG->DAG Instruction Selection' /
                    core dumped
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: FreeBSD
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: namor_t140101 at hemio.de
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

# issue, same with llvm 3.2 and 3.4 (shown below)
[bulldozer] ~/np/proj/largewords> llc largewords.ll
Stack dump:
0.      Program arguments: llc largewords.ll 
1.      Running pass 'Function Pass Manager' on module 'largewords.ll'.
2.      Running pass 'X86 DAG->DAG Instruction Selection' on function '@main'
Bus error (core dumped)

# source file to reproduce:
[bulldozer] ~/np/proj/largewords> cat largewords.ll
define i32 @main(i32 %argc, i8** %argv)
        %1 = zext i32 %argc to i256
        %2 = mul i256 123987129387892374987129837, %1
        %3 = add i256 5444517870735015415413993718908291383296, %2
        %4 = trunc i256 %3 to i32
        ret i32 %4

# rest is system information, attached is a the core file
[bulldozer] ~/np/proj/largewords> uname -a
FreeBSD bulldozer.local 9.1-RELEASE-p3 FreeBSD 9.1-RELEASE-p3 #0: Mon Apr 29
18:27:25 UTC 2013    
root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
[bulldozer] ~/np/proj/largewords> llc --version
LLVM (http://llvm.org/):
  LLVM version 3.4svn
  Optimized build.
  Built Jun  1 2013 (09:33:05).
  Default target: amd64-portbld-freebsd9.1
  Host CPU: bdver1

  Registered Targets:
    aarch64  - AArch64
    arm      - ARM
    cpp      - C++ backend
    hexagon  - Hexagon
    mblaze   - MBlaze
    mips     - Mips
    mips64   - Mips64 [experimental]
    mips64el - Mips64el [experimental]
    mipsel   - Mipsel
    msp430   - MSP430 [experimental]
    nvptx    - NVIDIA PTX 32-bit
    nvptx64  - NVIDIA PTX 64-bit
    ppc32    - PowerPC 32
    ppc64    - PowerPC 64
    sparc    - Sparc
    sparcv9  - Sparc V9
    systemz  - SystemZ
    thumb    - Thumb
    x86      - 32-bit X86: Pentium-Pro and above
    x86-64   - 64-bit X86: EM64T and AMD64
    xcore    - XCore

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