|
| 1 | +# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| 2 | +# RUN: llc -mtriple=aarch64-unknown-unknown -o - -verify-machineinstrs -run-pass=instruction-select %s | FileCheck %s |
| 3 | + |
| 4 | +# When we select the G_ZEXTLOAD, the SUBREG_TO_REG will initially land on a |
| 5 | +# gpr64sp register. |
| 6 | +# |
| 7 | +# This caused a test failure when selecting the G_BRJT, because it was not being |
| 8 | +# constrained. This test checks that the G_BRJT is actually being constrained. |
| 9 | +# As a result, the SUBREG_TO_REG should end up on a gpr64common. |
| 10 | + |
| 11 | +... |
| 12 | +--- |
| 13 | +name: check_constrain |
| 14 | +legalized: true |
| 15 | +regBankSelected: true |
| 16 | +tracksRegLiveness: true |
| 17 | +jumpTable: |
| 18 | + kind: block-address |
| 19 | + entries: |
| 20 | + - id: 0 |
| 21 | + blocks: [ '%bb.4' ] |
| 22 | +body: | |
| 23 | + ; CHECK-LABEL: name: check_constrain |
| 24 | + ; CHECK: bb.0: |
| 25 | + ; CHECK: successors: %bb.3(0x40000000), %bb.1(0x40000000) |
| 26 | + ; CHECK: [[DEF:%[0-9]+]]:gpr64common = IMPLICIT_DEF |
| 27 | + ; CHECK: [[LDRBBui:%[0-9]+]]:gpr32 = LDRBBui [[DEF]], 0 :: (load 1) |
| 28 | + ; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64common = SUBREG_TO_REG 0, [[LDRBBui]], %subreg.sub_32 |
| 29 | + ; CHECK: $xzr = SUBSXri [[SUBREG_TO_REG]], 8, 0, implicit-def $nzcv |
| 30 | + ; CHECK: Bcc 8, %bb.3, implicit $nzcv |
| 31 | + ; CHECK: bb.1: |
| 32 | + ; CHECK: successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| 33 | + ; CHECK: [[MOVaddrJT:%[0-9]+]]:gpr64 = MOVaddrJT target-flags(aarch64-page) %jump-table.0, target-flags(aarch64-pageoff, aarch64-nc) %jump-table.0 |
| 34 | + ; CHECK: early-clobber %6:gpr64, early-clobber %7:gpr64sp = JumpTableDest32 [[MOVaddrJT]], [[SUBREG_TO_REG]], %jump-table.0 |
| 35 | + ; CHECK: BR %6 |
| 36 | + ; CHECK: bb.2: |
| 37 | + ; CHECK: successors: %bb.3(0x80000000) |
| 38 | + ; CHECK: B %bb.3 |
| 39 | + ; CHECK: bb.3: |
| 40 | + ; CHECK: RET_ReallyLR |
| 41 | + bb.1: |
| 42 | + %1:gpr(p0) = G_IMPLICIT_DEF |
| 43 | + %5:gpr(s64) = G_ZEXTLOAD %1(p0) :: (load 1) |
| 44 | + %7:gpr(s64) = G_CONSTANT i64 8 |
| 45 | + %16:gpr(s32) = G_ICMP intpred(ugt), %5(s64), %7 |
| 46 | + %8:gpr(s1) = G_TRUNC %16(s32) |
| 47 | + G_BRCOND %8(s1), %bb.4 |
| 48 | +
|
| 49 | + bb.2: |
| 50 | + successors: %bb.3, %bb.4 |
| 51 | +
|
| 52 | + %9:gpr(p0) = G_JUMP_TABLE %jump-table.0 |
| 53 | + G_BRJT %9(p0), %jump-table.0, %5(s64) |
| 54 | +
|
| 55 | + bb.3: |
| 56 | + G_BR %bb.4 |
| 57 | +
|
| 58 | + bb.4: |
| 59 | + RET_ReallyLR |
| 60 | +
|
| 61 | +... |
0 commit comments