xref: /llvm-project/llvm/test/CodeGen/ARM/load_store_opt_clobber_cpsr.mir (revision fae05692a36f9ebbd201d93c2a6b0f927564d7e6) 
1# RUN: llc -mtriple=thumbv6m--eabi -verify-machineinstrs -run-pass=arm-ldst-opt %s -o - | FileCheck %s
2
3# Make sure bb.0 isn't transformed: it would incorrectly clobber CPSR.
4#
5# Make sure bb.1 is transformed, so the test doesn't accidentally break.
6
7# CHECK-LABEL: bb.0:
8# CHECK: renamable $r0 = tLDRi renamable $r4, 0, 14 /* CC::al */, $noreg :: (load (s32))
9# CHECK: renamable $r1 = tLDRi renamable $r4, 1, 14 /* CC::al */, $noreg :: (load (s32))
10
11# CHECK-LABEL: bb.1:
12# CHECK: $r4 = tLDMIA_UPD $r4, 14 /* CC::al */, $noreg, def $r0, def $r1
13# CHECK: $r4, dead $cpsr = tSUBi8 $r4, 8, 14 /* CC::al */, $noreg
14
15name: foo
16tracksRegLiveness: true
17body: |
18  bb.0:
19    liveins: $r2, $r4
20    renamable $r0 = tLDRi renamable $r2, 4, 14, $noreg :: (load (s32))
21    dead renamable $r0, $cpsr = tADDi3 killed renamable $r0, 1, 14, $noreg
22    renamable $r0 = tLDRi renamable $r4, 0, 14, $noreg :: (load (s32))
23    renamable $r1 = tLDRi renamable $r4, 1, 14, $noreg :: (load (s32))
24    tBcc %bb.1, 0, killed $cpsr
25  bb.1:
26    liveins: $r2, $r4
27    renamable $r0 = tLDRi renamable $r2, 4, 14, $noreg :: (load (s32))
28    dead renamable $r0, $cpsr = tADDi3 killed renamable $r0, 1, 14, $noreg
29    renamable $r0 = tLDRi renamable $r4, 0, 14, $noreg :: (load (s32))
30    renamable $r1 = tLDRi renamable $r4, 1, 14, $noreg :: (load (s32))
31  bb.2:
32    liveins: $r4
33    tTRAP
34