[LLVMbugs] [Bug 21944] New: clang segmentation fault slp-vectorize

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Dec 17 17:01:51 PST 2014


            Bug ID: 21944
           Summary: clang segmentation fault slp-vectorize
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: chh at google.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13559
  --> http://llvm.org/bugs/attachment.cgi?id=13559&action=edit
script and preprocessed source input to reproduce the bug

When compiling Android Open Source for aosp_fugu-userdebug target, clang has a
segmentation fault:

1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module
4.      Running pass 'X86 DAG->DAG Instruction Selection' on function
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
clang version 3.6 
Target: i686--linux-android
Thread model: posix

Attached p256.zip file contains the reproducible data p256_ec-872742.{c,sh}

I can avoid the segmentation fault by turning off slp-vectorize, compiled with

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