4 x i8 u/srem causes internal compiler error in nvptx instruction selection

[abadams]

The failures below are with commit 546c3d7

I believe this started happening last week (Oct 9-13) . The obvious commit to suspect is cbafb6f

The following .ll:

target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
target triple = "nvptx64--"

define void @f(ptr %a, ptr %b, ptr %c) {
entry:
  %t57 = load <4 x i8>, ptr %a, align 1
  %t59 = load <4 x i8>, ptr %b, align 1
  %x = srem <4 x i8> %t57, %t59
  store <4 x i8> %x, ptr %c, align 1
  ret void
}

When compiled with llc with no args, produces the crash dump below:

LLVM ERROR: Cannot select: t21: v4i8,v4i8 = sdivrem t28, t25
  t28: v4i8 = bitcast t36
    t36: i32 = or t117, t83
      t117: i32 = or t115, t116
        t115: i32 = shl t75, Constant:i32<24>
          t75: i32,ch = load<(load (s8) from %ir.a + 3), zext from i8> t0, t88, undef:i64
            t88: i64 = add t18, Constant:i64<3>
              t18: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
                t1: i64 = TargetExternalSymbol'f_param_0'
                t3: i64 = undef
              t87: i64 = Constant<3>
            t3: i64 = undef
          t106: i32 = Constant<24>
        t116: i32 = shl t73, Constant:i32<16>
          t73: i32,ch = load<(load (s8) from %ir.a + 2), zext from i8> t0, t32, undef:i64
            t32: i64 = add nuw t18, Constant:i64<2>
              t18: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
                t1: i64 = TargetExternalSymbol'f_param_0'
                t3: i64 = undef
              t31: i64 = Constant<2>
            t3: i64 = undef
          t34: i32 = Constant<16>
      t83: i32 = or t82, t79
        t82: i32 = shl t81, Constant:i32<8>
          t81: i32,ch = load<(load (s8) from %ir.a + 1), zext from i8> t0, t80, undef:i64
            t80: i64 = add nuw t18, Constant:i64<1>
              t18: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
                t1: i64 = TargetExternalSymbol'f_param_0'
                t3: i64 = undef
              t52: i64 = Constant<1>
            t3: i64 = undef
          t49: i32 = Constant<8>
        t79: i32,ch = load<(load (s8) from %ir.a), zext from i8> t0, t18, undef:i64
          t18: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
            t1: i64 = TargetExternalSymbol'f_param_0'
            t3: i64 = undef
          t3: i64 = undef
  t25: v4i8 = bitcast t42
    t42: i32 = or t112, t71
      t112: i32 = or t110, t111
        t110: i32 = shl t63, Constant:i32<24>
          t63: i32,ch = load<(load (s8) from %ir.b + 3), zext from i8> t0, t91, undef:i64
            t91: i64 = add t19, Constant:i64<3>
              t19: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
                t6: i64 = TargetExternalSymbol'f_param_1'
                t3: i64 = undef
              t87: i64 = Constant<3>
            t3: i64 = undef
          t106: i32 = Constant<24>
        t111: i32 = shl t61, Constant:i32<16>
          t61: i32,ch = load<(load (s8) from %ir.b + 2), zext from i8> t0, t39, undef:i64
            t39: i64 = add nuw t19, Constant:i64<2>
              t19: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
                t6: i64 = TargetExternalSymbol'f_param_1'
                t3: i64 = undef
              t31: i64 = Constant<2>
            t3: i64 = undef
          t34: i32 = Constant<16>
      t71: i32 = or t70, t67
        t70: i32 = shl t69, Constant:i32<8>
          t69: i32,ch = load<(load (s8) from %ir.b + 1), zext from i8> t0, t68, undef:i64
            t68: i64 = add nuw t19, Constant:i64<1>
              t19: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
                t6: i64 = TargetExternalSymbol'f_param_1'
                t3: i64 = undef
              t52: i64 = Constant<1>
            t3: i64 = undef
          t49: i32 = Constant<8>
        t67: i32,ch = load<(load (s8) from %ir.b), zext from i8> t0, t19, undef:i64
          t19: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
            t6: i64 = TargetExternalSymbol'f_param_1'
            t3: i64 = undef
          t3: i64 = undef
In function: f
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/abadams/projects/llvm-main/install/bin/llc test2.ll
1.	Running pass 'Function Pass Manager' on module 'test2.ll'.
2.	Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@f'
 #0 0x00000000026d3fb7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/abadams/projects/llvm-main/install/bin/llc+0x26d3fb7)
 #1 0x00000000026d18ae llvm::sys::RunSignalHandlers() (/home/abadams/projects/llvm-main/install/bin/llc+0x26d18ae)
 #2 0x00000000026d47da SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f04f843d520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f04f84919fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f04f84919fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f04f84919fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f04f843d476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f04f84237f3 abort ./stdlib/abort.c:81:7
 #9 0x00000000026419ec llvm::report_fatal_error(llvm::Twine const&, bool) (/home/abadams/projects/llvm-main/install/bin/llc+0x26419ec)
#10 0x00000000024cc48a llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cc48a)
#11 0x00000000024cad3e llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cad3e)
#12 0x00000000024bf575 llvm::SelectionDAGISel::DoInstructionSelection() (/home/abadams/projects/llvm-main/install/bin/llc+0x24bf575)
#13 0x00000000024be06e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/home/abadams/projects/llvm-main/install/bin/llc+0x24be06e)
#14 0x00000000024bb88e llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24bb88e)
#15 0x00000000024b820b llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24b820b)
#16 0x0000000001a2b0a8 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1a2b0a8)
#17 0x0000000001f763bc llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f763bc)
#18 0x0000000001f7dbc1 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f7dbc1)
#19 0x0000000001f76cd8 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f76cd8)
#20 0x000000000070fbf4 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x000000000070dbcd main (/home/abadams/projects/llvm-main/install/bin/llc+0x70dbcd)
#22 0x00007f04f8424d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#23 0x00007f04f8424e40 call_init ./csu/../csu/libc-start.c:128:20
#24 0x00007f04f8424e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#25 0x000000000070ab15 _start (/home/abadams/projects/llvm-main/install/bin/llc+0x70ab15)
Aborted (core dumped)

Trying out some variants, I found that:

• Changing it to <2 x i8> produces no error.
• Changing it to <4 x i16> also produces no error.
• Changing the srem to a urem produces the same error (but with udivrem instead of sdivrem).
• Increasing the vector size above 4 produces the same error.
• Changing it to <3 x i8> produces a different error:

LLVM ERROR: Cannot select: t35: v2i16 = scalar_to_vector t115
  t115: i16 = or t114, t111
    t114: i16 = shl t113, Constant:i32<8>
      t113: i16,ch = load<(load (s8) from %ir.b + 1), zext from i8> t0, t112, undef:i64
        t112: i64 = add nuw t30, Constant:i64<1>
          t30: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
            t6: i64 = TargetExternalSymbol'f_param_1'
            t3: i64 = undef
          t23: i64 = Constant<1>
        t3: i64 = undef
      t86: i32 = Constant<8>
    t111: i16,ch = load<(load (s8) from %ir.b), zext from i8> t0, t30, undef:i64
      t30: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
        t6: i64 = TargetExternalSymbol'f_param_1'
        t3: i64 = undef
      t3: i64 = undef
In function: f
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/abadams/projects/llvm-main/install/bin/llc test2.ll
1.	Running pass 'Function Pass Manager' on module 'test2.ll'.
2.	Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@f'
 #0 0x00000000026d3fb7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/abadams/projects/llvm-main/install/bin/llc+0x26d3fb7)
 #1 0x00000000026d18ae llvm::sys::RunSignalHandlers() (/home/abadams/projects/llvm-main/install/bin/llc+0x26d18ae)
 #2 0x00000000026d47da SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f43ccf4b520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f43ccf9f9fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f43ccf9f9fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f43ccf9f9fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f43ccf4b476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f43ccf317f3 abort ./stdlib/abort.c:81:7
 #9 0x00000000026419ec llvm::report_fatal_error(llvm::Twine const&, bool) (/home/abadams/projects/llvm-main/install/bin/llc+0x26419ec)
#10 0x00000000024cc48a llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cc48a)
#11 0x00000000024cad3e llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cad3e)
#12 0x00000000024bf575 llvm::SelectionDAGISel::DoInstructionSelection() (/home/abadams/projects/llvm-main/install/bin/llc+0x24bf575)
#13 0x00000000024be06e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/home/abadams/projects/llvm-main/install/bin/llc+0x24be06e)
#14 0x00000000024bb88e llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24bb88e)
#15 0x00000000024b820b llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24b820b)
#16 0x0000000001a2b0a8 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1a2b0a8)
#17 0x0000000001f763bc llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f763bc)
#18 0x0000000001f7dbc1 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f7dbc1)
#19 0x0000000001f76cd8 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f76cd8)
#20 0x000000000070fbf4 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x000000000070dbcd main (/home/abadams/projects/llvm-main/install/bin/llc+0x70dbcd)
#22 0x00007f43ccf32d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#23 0x00007f43ccf32e40 call_init ./csu/../csu/libc-start.c:128:20
#24 0x00007f43ccf32e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#25 0x000000000070ab15 _start (/home/abadams/projects/llvm-main/install/bin/llc+0x70ab15)
Aborted (core dumped)

Increasing the alignment on the loads and store to 4 produces a simpler error:

LLVM ERROR: Cannot select: t21: v4i8,v4i8 = udivrem t12, t13
  t12: v4i8,ch = load<(load (s32) from %ir.a)> t0, t18, undef:i64
    t18: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
      t1: i64 = TargetExternalSymbol'f_param_0'
      t3: i64 = undef
    t3: i64 = undef
  t13: v4i8,ch = load<(load (s32) from %ir.b)> t0, t19, undef:i64
    t19: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
      t6: i64 = TargetExternalSymbol'f_param_1'
      t3: i64 = undef
    t3: i64 = undef
In function: f
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/abadams/projects/llvm-main/install/bin/llc test2.ll
1.	Running pass 'Function Pass Manager' on module 'test2.ll'.
2.	Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@f'
 #0 0x00000000026d3fb7 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/abadams/projects/llvm-main/install/bin/llc+0x26d3fb7)
 #1 0x00000000026d18ae llvm::sys::RunSignalHandlers() (/home/abadams/projects/llvm-main/install/bin/llc+0x26d18ae)
 #2 0x00000000026d47da SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f5eabd6c520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f5eabdc09fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f5eabdc09fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f5eabdc09fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f5eabd6c476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f5eabd527f3 abort ./stdlib/abort.c:81:7
 #9 0x00000000026419ec llvm::report_fatal_error(llvm::Twine const&, bool) (/home/abadams/projects/llvm-main/install/bin/llc+0x26419ec)
#10 0x00000000024cc48a llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cc48a)
#11 0x00000000024cad3e llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cad3e)
#12 0x00000000024bf575 llvm::SelectionDAGISel::DoInstructionSelection() (/home/abadams/projects/llvm-main/install/bin/llc+0x24bf575)
#13 0x00000000024be06e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/home/abadams/projects/llvm-main/install/bin/llc+0x24be06e)
#14 0x00000000024bb88e llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24bb88e)
#15 0x00000000024b820b llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24b820b)
#16 0x0000000001a2b0a8 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1a2b0a8)
#17 0x0000000001f763bc llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f763bc)
#18 0x0000000001f7dbc1 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f7dbc1)
#19 0x0000000001f76cd8 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f76cd8)
#20 0x000000000070fbf4 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x000000000070dbcd main (/home/abadams/projects/llvm-main/install/bin/llc+0x70dbcd)
#22 0x00007f5eabd53d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#23 0x00007f5eabd53e40 call_init ./csu/../csu/libc-start.c:128:20
#24 0x00007f5eabd53e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#25 0x000000000070ab15 _start (/home/abadams/projects/llvm-main/install/bin/llc+0x70ab15)
Aborted (core dumped)

[abadams]

Also, sign-extending the result of a <4 x i8> comparison fails in a similar way:

target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
target triple = "nvptx64--"

define void @f(ptr %a, ptr %b, ptr %c) {
entry:
  %t1 = load <4 x i8>, ptr %a, align 4
  %t2 = load <4 x i8>, ptr %b, align 4
  %t5 = icmp ugt <4 x i8> %t1, %t2
  %t6 = sext <4 x i1> %t5 to <4 x i8>
  store <4 x i8> %t6, ptr %c, align 4
  ret void
}

LLVM ERROR: Cannot select: t20: v4i8 = setcc t12, t13, setugt:ch
  t12: v4i8,ch = load<(load (s32) from %ir.a)> t0, t21, undef:i64
    t21: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_0', undef:i64
      t1: i64 = TargetExternalSymbol'f_param_0'
      t3: i64 = undef
    t3: i64 = undef
  t13: v4i8,ch = load<(load (s32) from %ir.b)> t0, t22, undef:i64
    t22: i64,ch = load<(dereferenceable invariant load (s64) from `ptr addrspace(101) null`, addrspace 101)> t0, TargetExternalSymbol:i64'f_param_1', undef:i64
      t6: i64 = TargetExternalSymbol'f_param_1'
      t3: i64 = undef
    t3: i64 = undef
In function: f
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/abadams/projects/llvm-main/install/bin/llc test2.ll
1.	Running pass 'Function Pass Manager' on module 'test2.ll'.
2.	Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@f'
 #0 0x00000000026d4677 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/abadams/projects/llvm-main/install/bin/llc+0x26d4677)
 #1 0x00000000026d1f6e llvm::sys::RunSignalHandlers() (/home/abadams/projects/llvm-main/install/bin/llc+0x26d1f6e)
 #2 0x00000000026d4e9a SignalHandler(int) Signals.cpp:0:0
 #3 0x00007f9cf867b520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f9cf86cf9fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f9cf86cf9fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f9cf86cf9fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f9cf867b476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f9cf86617f3 abort ./stdlib/abort.c:81:7
 #9 0x00000000026420ac llvm::report_fatal_error(llvm::Twine const&, bool) (/home/abadams/projects/llvm-main/install/bin/llc+0x26420ac)
#10 0x00000000024ccada llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/home/abadams/projects/llvm-main/install/bin/llc+0x24ccada)
#11 0x00000000024cb38e llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/home/abadams/projects/llvm-main/install/bin/llc+0x24cb38e)
#12 0x00000000024bfbc5 llvm::SelectionDAGISel::DoInstructionSelection() (/home/abadams/projects/llvm-main/install/bin/llc+0x24bfbc5)
#13 0x00000000024be6be llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/home/abadams/projects/llvm-main/install/bin/llc+0x24be6be)
#14 0x00000000024bbede llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24bbede)
#15 0x00000000024b885b llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/home/abadams/projects/llvm-main/install/bin/llc+0x24b885b)
#16 0x0000000001a2b388 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1a2b388)
#17 0x0000000001f7669c llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f7669c)
#18 0x0000000001f7dea1 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f7dea1)
#19 0x0000000001f76fb8 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/abadams/projects/llvm-main/install/bin/llc+0x1f76fb8)
#20 0x000000000070fc24 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x000000000070dbfd main (/home/abadams/projects/llvm-main/install/bin/llc+0x70dbfd)
#22 0x00007f9cf8662d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#23 0x00007f9cf8662e40 call_init ./csu/../csu/libc-start.c:128:20
#24 0x00007f9cf8662e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#25 0x000000000070ab45 _start (/home/abadams/projects/llvm-main/install/bin/llc+0x70ab45)
Aborted (core dumped)

[Artem-B]

We should've expanded those ops into individual elements. I'll fix it shortly.

[abadams]

Thanks!

[Artem-B]

Let me know if you see any other corner cases. introduction of v2i16 support uncovered disturbingly many corner cases in how we handle v4i8 (and i8 in general), so I'm not completely sure we've covered all of them.