[LLVMbugs] [Bug 19331] New: [ARM64] An Assertion failure about INSERT_SUBREG in EmitSubregNode()

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19331

            Bug ID: 19331
           Summary: [ARM64] An Assertion failure about INSERT_SUBREG in
                    EmitSubregNode()
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: Hao.Liu at arm.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Test case:
--------------------------------------------------------------
#include "arm_neon.h"

uint64x1_t dotest_insert_subreg(uint64x2_t in0) {
  return vdup_n_u64(vpaddd_u64(in0));
}
--------------------------------------------------------------

To run:
clang -O0 --target=arm64-linux-gnu -c test0.c

The error message is as following:
llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp:549: void
llvm::InstrEmitter::EmitSubregNode(llvm::SDNode*, llvm::DenseMap<llvm::SDValue,
unsigned int>&, bool, bool): Assertion `SRC && "No register class supports VT
and SubIdx for INSERT_SUBREG"' failed.

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