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      1 # RUN: llc -march=mips -mcpu=mips32r6 -mattr=+micromips %s -start-after=xray-instrumentation -o - -show-mc-encoding | FileCheck %s
      2 
      3 # Test that the 'sll $zero, $zero, 0' is correctly recognized as a real
      4 # instruction rather than some unimplemented opcode for the purposes of
      5 # encoding an instruction.
      6 
      7 # CHECK-LABEL: a:
      8 # CHECK:  nop                           # encoding: [0x00,0x00,0x00,0x00]
      9 # CHECK:  jrc   $ra                     # encoding: [0x45,0xbf]
     10 ---
     11 name:            a
     12 alignment:       2
     13 exposesReturnsTwice: false
     14 legalized:       false
     15 regBankSelected: false
     16 selected:        false
     17 tracksRegLiveness: false
     18 registers:
     19 liveins:
     20   - { reg: '$a0', virtual-reg: '' }
     21 frameInfo:
     22   isFrameAddressTaken: false
     23   isReturnAddressTaken: false
     24   hasStackMap:     false
     25   hasPatchPoint:   false
     26   stackSize:       0
     27   offsetAdjustment: 0
     28   maxAlignment:    1
     29   adjustsStack:    false
     30   hasCalls:        false
     31   stackProtector:  ''
     32   maxCallFrameSize: 0
     33   hasOpaqueSPAdjustment: false
     34   hasVAStart:      false
     35   hasMustTailInVarArgFunc: false
     36   savePoint:       ''
     37   restorePoint:    ''
     38 fixedStack:
     39 stack:
     40 constants:
     41 body:             |
     42   bb.0.entry:
     43     $zero = SLL_MMR6 killed $zero, 0
     44     JRC16_MM undef $ra, implicit $v0
     45 
     46 ...
     47