| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -mtriple=aarch64-unknown-unknown -o - -verify-machineinstrs -run-pass=instruction-select %s | FileCheck %s |
| |
| # When we select the G_ZEXTLOAD, the SUBREG_TO_REG will initially land on a |
| # gpr64sp register. |
| # |
| # This caused a test failure when selecting the G_BRJT, because it was not being |
| # constrained. This test checks that the G_BRJT is actually being constrained. |
| # As a result, the SUBREG_TO_REG should end up on a gpr64common. |
| |
| ... |
| --- |
| name: check_constrain |
| legalized: true |
| regBankSelected: true |
| tracksRegLiveness: true |
| jumpTable: |
| kind: block-address |
| entries: |
| - id: 0 |
| blocks: [ '%bb.4' ] |
| body: | |
| ; CHECK-LABEL: name: check_constrain |
| ; CHECK: bb.0: |
| ; CHECK: successors: %bb.3(0x40000000), %bb.1(0x40000000) |
| ; CHECK: [[DEF:%[0-9]+]]:gpr64common = IMPLICIT_DEF |
| ; CHECK: [[LDRBBui:%[0-9]+]]:gpr32 = LDRBBui [[DEF]], 0 :: (load (s8)) |
| ; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64common = SUBREG_TO_REG 0, [[LDRBBui]], %subreg.sub_32 |
| ; CHECK: [[SUBSXri:%[0-9]+]]:gpr64 = SUBSXri [[SUBREG_TO_REG]], 8, 0, implicit-def $nzcv |
| ; CHECK: Bcc 8, %bb.3, implicit $nzcv |
| ; CHECK: bb.1: |
| ; CHECK: successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| ; CHECK: [[MOVaddrJT:%[0-9]+]]:gpr64common = MOVaddrJT target-flags(aarch64-page) %jump-table.0, target-flags(aarch64-pageoff, aarch64-nc) %jump-table.0 |
| ; CHECK: early-clobber %6:gpr64, early-clobber %7:gpr64sp = JumpTableDest32 [[MOVaddrJT]], [[SUBREG_TO_REG]], %jump-table.0 |
| ; CHECK: BR %6 |
| ; CHECK: bb.2: |
| ; CHECK: successors: %bb.3(0x80000000) |
| ; CHECK: B %bb.3 |
| ; CHECK: bb.3: |
| ; CHECK: RET_ReallyLR |
| bb.1: |
| %1:gpr(p0) = G_IMPLICIT_DEF |
| %5:gpr(s64) = G_ZEXTLOAD %1(p0) :: (load (s8)) |
| %7:gpr(s64) = G_CONSTANT i64 8 |
| %16:gpr(s32) = G_ICMP intpred(ugt), %5(s64), %7 |
| %8:gpr(s1) = G_TRUNC %16(s32) |
| G_BRCOND %8(s1), %bb.4 |
| |
| bb.2: |
| successors: %bb.3, %bb.4 |
| |
| %9:gpr(p0) = G_JUMP_TABLE %jump-table.0 |
| G_BRJT %9(p0), %jump-table.0, %5(s64) |
| |
| bb.3: |
| G_BR %bb.4 |
| |
| bb.4: |
| RET_ReallyLR |
| |
| ... |