| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple aarch64-apple-ios -run-pass=aarch64-prelegalizer-combiner %s -o - -verify-machineinstrs | FileCheck %s |
| |
| # Check that we insert the divrem at the place of the G_UDIV, not the G_UREM. |
| --- |
| name: divrem_use_before_def |
| alignment: 4 |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$x0' } |
| body: | |
| ; CHECK-LABEL: name: divrem_use_before_def |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000) |
| ; CHECK: liveins: $x0 |
| ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $x0 |
| ; CHECK: [[DEF:%[0-9]+]]:_(s1) = G_IMPLICIT_DEF |
| ; CHECK: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 0 |
| ; CHECK: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 32 |
| ; CHECK: G_BRCOND [[DEF]](s1), %bb.2 |
| ; CHECK: G_BR %bb.1 |
| ; CHECK: bb.1: |
| ; CHECK: successors: %bb.2(0x80000000) |
| ; CHECK: [[DEF1:%[0-9]+]]:_(s32) = G_IMPLICIT_DEF |
| ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[C]](s64) |
| ; CHECK: [[UDIVREM:%[0-9]+]]:_(s32), [[UDIVREM1:%[0-9]+]]:_ = G_UDIVREM [[DEF1]], [[TRUNC]] |
| ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[UDIVREM]](s32) |
| ; CHECK: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 -1 |
| ; CHECK: [[FREEZE:%[0-9]+]]:_(s64) = G_FREEZE [[C2]] |
| ; CHECK: [[UDIV:%[0-9]+]]:_(s64) = G_UDIV [[FREEZE]], [[C]] |
| ; CHECK: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[ZEXT]], [[C1]](s64) |
| ; CHECK: [[ADD:%[0-9]+]]:_(s64) = G_ADD [[SHL]], [[UDIV]] |
| ; CHECK: G_STORE [[ADD]](s64), [[COPY]](p0) :: (store (s64)) |
| ; CHECK: bb.2: |
| bb.1: |
| liveins: $x0 |
| |
| %0:_(p0) = COPY $x0 |
| %1:_(s1) = G_IMPLICIT_DEF |
| %2:_(s64) = G_IMPLICIT_DEF |
| %4:_(s64) = G_CONSTANT i64 0 |
| %12:_(s64) = G_CONSTANT i64 32 |
| G_BRCOND %1(s1), %bb.3 |
| G_BR %bb.2 |
| |
| bb.2: |
| %3:_(s32) = G_TRUNC %2(s64) |
| %5:_(s32) = G_TRUNC %4(s64) |
| %6:_(s32) = G_UDIV %3, %5 |
| %7:_(s64) = G_ZEXT %6(s32) |
| %8:_(s32) = COPY %3(s32) |
| %9:_(s32) = COPY %5(s32) |
| %10:_(s32) = G_UREM %8, %9 |
| %11:_(s64) = G_ZEXT %10(s32) |
| %13:_(s64) = nuw G_SHL %11, %12(s64) |
| %14:_(s64) = G_OR %2, %13 |
| %15:_(s64) = G_FREEZE %14 |
| %16:_(s64) = G_UDIV %15, %4 |
| %17:_(s64) = G_SHL %7, %12(s64) |
| %18:_(s64) = G_ADD %17, %16 |
| G_STORE %18(s64), %0(p0) :: (store (s64)) |
| |
| bb.3: |
| |
| ... |