| # 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 | |
| ... |