| # RUN: llc -O0 %s -o - -march=avr | FileCheck %s |
| |
| # This test checks the expansion of the 16-bit 'LDDWRdPtrQ' pseudo instruction. |
| # |
| # 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_lddwrdptrq() { |
| entry: |
| ret void |
| } |
| ... |
| |
| --- |
| name: test_lddwrdptrq |
| tracksRegLiveness: true |
| body: | |
| bb.0.entry: |
| |
| ; CHECK-LABEL: test_lddwrdptrq |
| |
| ; CHECK: ldd [[SCRATCH:r[0-9]+]], Z+10 |
| ; CHECK-NEXT: push [[SCRATCH]] |
| ; CHECK-NEXT: ldd [[SCRATCH]], Z+11 |
| ; CHECK-NEXT: mov r31, [[SCRATCH]] |
| ; CHECK-NEXT: pop r30 |
| |
| early-clobber $r31r30 = LDDWRdPtrQ undef $r31r30, 10 |
| ... |