1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2 # RUN: llc -mtriple aarch64-apple-ios -run-pass=aarch64-prelegalizer-combiner %s -o - -verify-machineinstrs | FileCheck %s
4 # Check that we insert the divrem at the place of the G_UDIV, not the G_UREM.
6 name: divrem_use_before_def
8 tracksRegLiveness: true
12 ; CHECK-LABEL: name: divrem_use_before_def
14 ; CHECK-NEXT: successors: %bb.2(0x40000000), %bb.1(0x40000000)
15 ; CHECK-NEXT: liveins: $x0
17 ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
18 ; CHECK-NEXT: [[DEF:%[0-9]+]]:_(s1) = G_IMPLICIT_DEF
19 ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
20 ; CHECK-NEXT: G_BRCOND [[DEF]](s1), %bb.2
21 ; CHECK-NEXT: G_BR %bb.1
24 ; CHECK-NEXT: successors: %bb.2(0x80000000)
26 ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 -1
27 ; CHECK-NEXT: [[FREEZE:%[0-9]+]]:_(s64) = G_FREEZE [[C1]]
28 ; CHECK-NEXT: [[UDIV:%[0-9]+]]:_(s64) = G_UDIV [[FREEZE]], [[C]]
29 ; CHECK-NEXT: G_STORE [[UDIV]](s64), [[COPY]](p0) :: (store (s64))
36 %1:_(s1) = G_IMPLICIT_DEF
37 %2:_(s64) = G_IMPLICIT_DEF
38 %4:_(s64) = G_CONSTANT i64 0
39 %12:_(s64) = G_CONSTANT i64 32
40 G_BRCOND %1(s1), %bb.3
44 %3:_(s32) = G_TRUNC %2(s64)
45 %5:_(s32) = G_TRUNC %4(s64)
46 %6:_(s32) = G_UDIV %3, %5
47 %7:_(s64) = G_ZEXT %6(s32)
48 %8:_(s32) = COPY %3(s32)
49 %9:_(s32) = COPY %5(s32)
50 %10:_(s32) = G_UREM %8, %9
51 %11:_(s64) = G_ZEXT %10(s32)
52 %13:_(s64) = nuw G_SHL %11, %12(s64)
53 %14:_(s64) = G_OR %2, %13
54 %15:_(s64) = G_FREEZE %14
55 %16:_(s64) = G_UDIV %15, %4
56 %17:_(s64) = G_SHL %7, %12(s64)
57 %18:_(s64) = G_ADD %17, %16
58 G_STORE %18(s64), %0(p0) :: (store (s64))