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
4 # When we select the G_ZEXTLOAD, the SUBREG_TO_REG will initially land on a
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.
16 tracksRegLiveness: true
23 ; CHECK-LABEL: name: check_constrain
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 (s8))
28 ; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64common = SUBREG_TO_REG 0, [[LDRBBui]], %subreg.sub_32
29 ; CHECK: [[SUBSXri:%[0-9]+]]:gpr64 = SUBSXri [[SUBREG_TO_REG]], 8, 0, implicit-def $nzcv
30 ; CHECK: Bcc 8, %bb.3, implicit $nzcv
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
37 ; CHECK: successors: %bb.3(0x80000000)
42 %1:gpr(p0) = G_IMPLICIT_DEF
43 %5:gpr(s64) = G_ZEXTLOAD %1(p0) :: (load (s8))
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
50 successors: %bb.3, %bb.4
52 %9:gpr(p0) = G_JUMP_TABLE %jump-table.0
53 G_BRJT %9(p0), %jump-table.0, %5(s64)