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      1 # RUN: llc -O0  %s -o - -march=avr | FileCheck %s
      2 
      3 # This test checks the expansion of the 16-bit 'LDDWRdPtrQ' pseudo instruction.
      4 #
      5 # This test ensures that the pseudo expander can correctly handle the case
      6 # where we are expanding a 16-bit LDD instruction where the source and
      7 # destination registers are the same.
      8 #
      9 # The instruction itself is earlyclobber and so ISel will never produce an
     10 # instruction like this, but the stack slot loading can and will.
     11 
     12 --- |
     13   target triple = "avr--"
     14   define void @test_lddwrdptrq() {
     15   entry:
     16     ret void
     17   }
     18 ...
     19 
     20 ---
     21 name:            test_lddwrdptrq
     22 tracksRegLiveness: true
     23 body: |
     24   bb.0.entry:
     25 
     26     ; CHECK-LABEL: test_lddwrdptrq
     27 
     28     ; CHECK:      ldd [[SCRATCH:r[0-9]+]], Z+10
     29     ; CHECK-NEXT: push [[SCRATCH]]
     30     ; CHECK-NEXT: ldd [[SCRATCH]], Z+11
     31     ; CHECK-NEXT: mov r31, [[SCRATCH]]
     32     ; CHECK-NEXT: pop r30
     33 
     34     early-clobber $r31r30 = LDDWRdPtrQ undef $r31r30, 10
     35 ...
     36