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