| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple aarch64 -run-pass=aarch64-postlegalizer-lowering -verify-machineinstrs %s -o - | FileCheck %s |
| # |
| # Test producing a G_REV from an appropriate G_SHUFFLE_VECTOR. |
| |
| ... |
| --- |
| name: rev64_mask_1_0 |
| alignment: 4 |
| legalized: true |
| tracksRegLiveness: true |
| body: | |
| bb.1.entry: |
| liveins: $d0, $d1 |
| ; CHECK-LABEL: name: rev64_mask_1_0 |
| ; CHECK: liveins: $d0, $d1 |
| ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0 |
| ; CHECK: [[REV64_:%[0-9]+]]:_(<2 x s32>) = G_REV64 [[COPY]] |
| ; CHECK: $d0 = COPY [[REV64_]](<2 x s32>) |
| ; CHECK: RET_ReallyLR implicit $d0 |
| %0:_(<2 x s32>) = COPY $d0 |
| %1:_(<2 x s32>) = COPY $d1 |
| %2:_(<2 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1, shufflemask(1, 0) |
| $d0 = COPY %2(<2 x s32>) |
| RET_ReallyLR implicit $d0 |
| |
| ... |
| --- |
| name: rev64_mask_1_undef |
| alignment: 4 |
| legalized: true |
| tracksRegLiveness: true |
| body: | |
| bb.1.entry: |
| liveins: $d0, $d1 |
| ; CHECK-LABEL: name: rev64_mask_1_undef |
| ; CHECK: liveins: $d0, $d1 |
| ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0 |
| ; CHECK: [[REV64_:%[0-9]+]]:_(<2 x s32>) = G_REV64 [[COPY]] |
| ; CHECK: $d0 = COPY [[REV64_]](<2 x s32>) |
| ; CHECK: RET_ReallyLR implicit $d0 |
| %0:_(<2 x s32>) = COPY $d0 |
| %1:_(<2 x s32>) = COPY $d1 |
| %2:_(<2 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1, shufflemask(1, undef) |
| $d0 = COPY %2(<2 x s32>) |
| RET_ReallyLR implicit $d0 |
| |
| ... |
| --- |
| name: no_rev64_mask_1 |
| alignment: 4 |
| legalized: true |
| tracksRegLiveness: true |
| body: | |
| bb.1.entry: |
| liveins: $d0, $d1 |
| |
| ; Verify that we don't produce a G_REV64 when |
| ; |
| ; M[i] != (i - i % BlockElts) + (BlockElts - 1 - i % BlockElts) |
| ; In this example, BlockElts = 2 |
| ; |
| ; At i = 1 |
| ; M[i] = 3 |
| ; i % BlockElts = i % 2 = 1 |
| ; |
| ; So |
| ; |
| ; 3 != (1 - 1) + (2 - 1 - 1) |
| ; 3 != 0 |
| ; |
| ; And so we should not produce a G_REV64. |
| ; |
| ; CHECK-LABEL: name: no_rev64_mask_1 |
| ; CHECK: liveins: $d0, $d1 |
| ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $d0 |
| ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $d1 |
| ; CHECK: [[ZIP2_:%[0-9]+]]:_(<2 x s32>) = G_ZIP2 [[COPY]], [[COPY1]] |
| ; CHECK: $d0 = COPY [[ZIP2_]](<2 x s32>) |
| ; CHECK: RET_ReallyLR implicit $d0 |
| %0:_(<2 x s32>) = COPY $d0 |
| %1:_(<2 x s32>) = COPY $d1 |
| %2:_(<2 x s32>) = G_SHUFFLE_VECTOR %0(<2 x s32>), %1, shufflemask(1, 3) |
| $d0 = COPY %2(<2 x s32>) |
| RET_ReallyLR implicit $d0 |