| # RUN: llc -O0 %s -o - 2>&1 -march=avr | FileCheck %s |
| |
| # This test ensures that the pseudo expander can correctly handle the case |
| # where we are expanding a 16-bit LDD instruction where the source and |
| # destination registers are the same. |
| # |
| # The instruction itself is earlyclobber and so ISel will never produce an |
| # instruction like this, but the stack slot loading can and will. |
| |
| --- | |
| target triple = "avr--" |
| |
| define void @test_lddw() { |
| entry: |
| ret void |
| } |
| |
| ... |
| --- |
| name: test_lddw |
| stack: |
| - { id: 0, type: spill-slot, offset: -4, size: 1, alignment: 1, callee-saved-register: '%r28' } |
| body: | |
| bb.0.entry: |
| liveins: %r28, %r29 |
| |
| ; CHECK-LABEL: test_lddw |
| |
| ; CHECK: ldd [[TMPREG:r[0-9]+]], Y+0 |
| ; CHECK-NEXT: mov r28, [[TMPREG]] |
| ; CHECK-NEXT: ldd [[TMPREG]], Y+1 |
| ; CHECK-NEXT: mov r29, [[TMPREG]] |
| dead early-clobber %r29r28 = LDDWRdYQ killed %r29r28, 0 |
| ... |
