[LLVMbugs] [Bug 19332] New: [ARM64] Unrecognized MLA in DAG selection phase

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19332

            Bug ID: 19332
           Summary: [ARM64] Unrecognized MLA in DAG selection phase
           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 test1.c:
--------------------------------------------------------------
#include "arm_neon.h"

int32x4_t dotest_mla(int32x4_t in0) {
  return vmlaq_lane_s32(in0,
                        in0,
                        vget_high_s32(in0),
                        1);
}
--------------------------------------------------------------

To run under -O0
TO RUN: clang -O0 --target=arm64-linux-gnu -c test1.c

The error message is as following:
Unrecognized MLA.
UNREACHABLE executed at
/home/haoliu01/src/always-clean/lib/Target/ARM6/ARM64ISelDAGToDAG.cpp:462!

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