[llvm-bugs] [Bug 46441] New: Clang++ crash on AVX code

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46441

            Bug ID: 46441
           Summary: Clang++ crash on AVX code
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: matthijs at fb.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Created attachment 23644
  --> https://bugs.llvm.org/attachment.cgi?id=23644&action=edit
source file + 2 files generated by clang

clang++ version 8.0.20181009 crashes when compiling 

clang++ -mavx2 -O3  -g -std=c++11 matmul_18.cpp


The error output is 

fatal error: error in backend: Cannot select: 0x9ac1248: v16i16 =
X86ISD::VBROADCAST 0x9a8e460
  0x9a8e460: v4i16 = bitcast 0x9ac0958
    0x9ac0958: v4i64 = insert_subvector 0x9a88718, 0x9a88238, Constant:i64<2>
      0x9a88718: v4i64 = insert_subvector undef:v4i64, 0x9a88238,
Constant:i64<0>
        0x9ac0dd0: v4i64 = undef
        0x9a88238: v2i64 = bitcast 0x9abd3e0, matmul_18.cpp:117:33 @[
matmul_18.cpp:159:22 ]
          0x9abd3e0: v8i16 = X86ISD::VBROADCAST 0x9a88bf8, matmul_18.cpp:117:33
@[ matmul_18.cpp:159:22 ]
            0x9a88bf8: i16,ch = load<(load 2 from %ir.56, !tbaa !888)>
0x9946718, 0x9a88098, undef:i64, matmul_18.cpp:116:20 @[ matmul_18.cpp:159:22 ]
              0x9a88098: i64 = add nuw 0x9ac27d8, Constant:i64<16>,
matmul_18.cpp:116:35 @[ matmul_18.cpp:159:22 ]
                0x9ac27d8: i64 = add 0x9ac29e0, 0x9a88e68, matmul_18.cpp:159:37
                  0x9ac29e0: i64,ch = CopyFromReg 0x9946718, Register:i64 %32,
matmul_18.cpp:159:37

                  0x9a88e68: i64 = and 0x9ac4860, Constant:i64<4294967288>,
matmul_18.cpp:159:37


                0x9a885e0: i64 = Constant<16>
              0x9ac0f70: i64 = undef
        0x9abdc00: i64 = Constant<0>
      0x9a88238: v2i64 = bitcast 0x9abd3e0, matmul_18.cpp:117:33 @[
matmul_18.cpp:159:22 ]
        0x9abd3e0: v8i16 = X86ISD::VBROADCAST 0x9a88bf8, matmul_18.cpp:117:33
@[ matmul_18.cpp:159:22 ]
          0x9a88bf8: i16,ch = load<(load 2 from %ir.56, !tbaa !888)> 0x9946718,
0x9a88098, undef:i64, matmul_18.cpp:116:20 @[ matmul_18.cpp:159:22 ]
            0x9a88098: i64 = add nuw 0x9ac27d8, Constant:i64<16>,
matmul_18.cpp:116:35 @[ matmul_18.cpp:159:22 ]
              0x9ac27d8: i64 = add 0x9ac29e0, 0x9a88e68, matmul_18.cpp:159:37
                0x9ac29e0: i64,ch = CopyFromReg 0x9946718, Register:i64 %32,
matmul_18.cpp:159:37
                  0x9ac4c70: i64 = Register %32
                0x9a88e68: i64 = and 0x9ac4860, Constant:i64<4294967288>,
matmul_18.cpp:159:37
                  0x9ac4860: i64 = any_extend 0x9abe280, matmul_18.cpp:159:41

                  0x9ac0a90: i64 = Constant<4294967288>
              0x9a885e0: i64 = Constant<16>
            0x9ac0f70: i64 = undef
      0x9abdda0: i64 = Constant<2>
In function: _Z13matmul_CF_k18iiiPKaPKhPs
clang-8: error: clang frontend command failed with exit code 70 (use -v to see
invocation)
clang version 8.0.20181009 
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir:
/mnt/gvfs/third-party2/llvm-fb/52d450f21335df7a47d47f03d638e7ecbee6266f/20181009/platform007/9e92d53/bin
clang-8: note: diagnostic msg: PLEASE submit a bug report to
https://bugs.llvm.org/ and include the crash backtrace, preprocessed source,
and associated run script.
clang-8: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-8: note: diagnostic msg: /tmp/matmul_18-89d550.cpp
clang-8: note: diagnostic msg: /tmp/matmul_18-89d550.sh
clang-8: note: diagnostic msg: 

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

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