[LLVMbugs] [Bug 22484] New: Attempt to use AVX2 intrinsic crashes clang on macOS X

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=22484

            Bug ID: 22484
           Summary: Attempt to use AVX2 intrinsic crashes clang on macOS X
           Product: clang
           Version: 3.5
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: gbuella at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 13815
  --> http://llvm.org/bugs/attachment.cgi?id=13815&action=edit
C source file for reproducing the issue

The following code:

// compiler feature test used in a cmake makefile
#include <stdint.h>

typedef uint8_t vector32 __attribute__ ((vector_size (32)));

static const vector32 key32 = { 7,  6,  5,  4,  3,  2,  1,  0,
                               15, 14, 13, 12, 11, 10,  9,  8,
                               23, 22, 21, 20, 19, 18, 17, 16,
                               31, 30, 29, 28, 27, 26, 25, 24};


vector32 test_permute(vector32 v)
{
  return __builtin_ia32_pshufb256(v, key32);
}




results in the following output:

fatal error: error in backend: Cannot select: 0x1028f7510: v32i8 =
X86ISD::PSHUFB 0x1028f3f10, 0x1028f4210 [ORD=2] [ID=10]
  0x1028f3f10: v32i8,ch = CopyFromReg 0x10253b708, 0x1028f3e10 [ORD=1] [ID=6]
    0x1028f3e10: v32i8 = Register %vreg0 [ID=1]
  0x1028f4210: v32i8 = bitcast 0x1028f4110 [ORD=2] [ID=9]
    0x1028f4110: v4i64,ch = load 0x10253b708, 0x1028f4310,
0x1028f7010<LD32[ConstantPool]> [ORD=2] [ID=8]
      0x1028f4310: i64 = X86ISD::WrapperRIP 0x1028f7610 [ID=7]
        0x1028f7610: i64 = TargetConstantPool<<32 x i8> <i8 7, i8 6, i8 5, i8
4, i8 3, i8 2, i8 1, i8 0, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8
8, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 31, i8 30, i8 29,
i8 28, i8 27, i8 26, i8 25, i8 24>> 0 [ID=5]
      0x1028f7010: i64 = undef [ID=4]
In function: test_permute
clang: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
Target: x86_64-apple-darwin14.0.0
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to
http://developer.apple.com/bugreporter/ and include the crash backtrace,
preprocessed source, and associated run script.
clang: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang: note: diagnostic msg:
/var/folders/d8/m9xrbkrs2tj3x6xw_h0nmkn40000gn/T/vector32_test-594dbd.c
clang: note: diagnostic msg:
/var/folders/d8/m9xrbkrs2tj3x6xw_h0nmkn40000gn/T/vector32_test-594dbd.sh
clang: note: diagnostic msg:

********************

I'm not sure if this is only Apple specific, so I posted here. If it is, I can
send it to Apple.

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