| # RUN: llc -mtriple=thumbv7-linux-gnueabihf -run-pass=arm-cp-islands -arm-constant-island-max-iteration=1 %s -o - | FileCheck %s |
| --- | |
| ; ModuleID = 'constant-islands-new-island.ll' |
| source_filename = "constant-islands-new-island.ll" |
| target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "thumbv7-unknown-linux-gnueabihf" |
| |
| define void @test(i1 %tst) { |
| entry: |
| %0 = call i32 @llvm.arm.space(i32 2000, i32 undef) |
| br label %smallbb |
| |
| smallbb: ; preds = %entry |
| br i1 %tst, label %true, label %false |
| |
| true: ; preds = %false, %smallbb |
| %val = phi float [ 1.234500e+04, %smallbb ], [ undef, %false ] |
| %1 = call i32 @llvm.arm.space(i32 2000, i32 undef) |
| call void @bar(float %val) |
| ret void |
| |
| false: ; preds = %smallbb |
| br label %true |
| } |
| |
| declare void @bar(float) |
| |
| ; Function Attrs: nounwind |
| declare i32 @llvm.arm.space(i32 immarg, i32) #0 |
| |
| attributes #0 = { nounwind } |
| |
| ... |
| --- |
| name: test |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| noPhis: true |
| isSSA: false |
| noVRegs: true |
| hasFakeUses: false |
| callsEHReturn: false |
| callsUnwindInit: false |
| hasEHContTarget: false |
| hasEHScopes: false |
| hasEHFunclets: false |
| isOutlined: false |
| debugInstrRef: false |
| failsVerification: false |
| tracksDebugUserValues: false |
| registers: [] |
| liveins: |
| - { reg: '$r0', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 16 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| isCalleeSavedInfoValid: true |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: [] |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, name: '', type: spill-slot, offset: -16, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 2, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 3, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| entry_values: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: |
| - id: 0 |
| value: 'float 1.234500e+04' |
| alignment: 4 |
| isTargetSpecific: false |
| machineFunctionInfo: |
| isLRSpilled: true |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x80000000) |
| liveins: $r0, $r7, $lr |
| |
| frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp |
| frame-setup CFI_INSTRUCTION def_cfa_offset 8 |
| frame-setup CFI_INSTRUCTION offset $lr, -4 |
| frame-setup CFI_INSTRUCTION offset $r7, -8 |
| $sp = frame-setup tSUBspi $sp, 2, 14 /* CC::al */, $noreg |
| frame-setup CFI_INSTRUCTION def_cfa_offset 16 |
| tSTRspi killed $r0, $sp, 1, 14 /* CC::al */, $noreg :: (store (s32) into %stack.0) |
| renamable $r0 = IMPLICIT_DEF |
| dead renamable $r0 = SPACE 2000, killed renamable $r0 |
| t2B %bb.1, 14 /* CC::al */, $noreg |
| |
| bb.1.smallbb: |
| successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| |
| $r0 = tLDRspi $sp, 1, 14 /* CC::al */, $noreg :: (load (s32) from %stack.0) |
| renamable $s0 = VLDRS %const.0, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool) |
| renamable $r0, dead $cpsr = tLSLri renamable $r0, 31, 14 /* CC::al */, $noreg |
| tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| VSTRS killed $s0, $sp, 0, 14 /* CC::al */, $noreg :: (store (s32) into %stack.1) |
| t2Bcc %bb.3, 0 /* CC::eq */, killed $cpsr |
| t2B %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.2.true: |
| $s0 = VLDRS $sp, 0, 14 /* CC::al */, $noreg :: (load (s32) from %stack.1) |
| renamable $r0 = IMPLICIT_DEF |
| dead renamable $r0 = SPACE 2000, killed renamable $r0 |
| tBL 14 /* CC::al */, $noreg, @bar, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $s0, implicit-def $sp |
| $sp = frame-destroy tADDspi $sp, 2, 14 /* CC::al */, $noreg |
| frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc |
| |
| bb.3.false: |
| successors: %bb.2(0x80000000) |
| |
| renamable $s0 = IMPLICIT_DEF |
| t2B %bb.2, 14 /* CC::al */, $noreg |
| |
| ... |
| # Check that smallbb is not split by the constant islands pass. Previously, |
| # smallbb was split due to incorrect calculation of MinNoSplitDisp. |
| # |
| # CHECK: bb.1.smallbb: |
| # CHECK-NEXT: successors: %bb.3(0x40000000), %bb.4(0x40000000) |
| # CHECK-NEXT: {{^ $}} |
| # CHECK-NEXT: $r0 = tLDRspi $sp, 1, 14 /* CC::al */, $noreg :: (load (s32) from %stack.0) |
| # CHECK-NEXT: renamable $s0 = VLDRS %const.1, 0, 14 /* CC::al */, $noreg :: (load (s32) from constant-pool) |
| # CHECK-NEXT: renamable $r0, dead $cpsr = tLSLri renamable $r0, 31, 14 /* CC::al */, $noreg |
| # CHECK-NEXT: tCMPi8 killed renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| # CHECK-NEXT: VSTRS killed $s0, $sp, 0, 14 /* CC::al */, $noreg :: (store (s32) into %stack.1) |
| # CHECK-NEXT: t2Bcc %bb.4, 0 /* CC::eq */, killed $cpsr |
| # CHECK-NEXT: tB %bb.3, 14 /* CC::al */, $noreg |
| # CHECK-NEXT: {{^ $}} |
| # CHECK-NEXT: bb.2 (align 4): |
| # CHECK-NEXT: successors: |
| # CHECK-NEXT: {{^ $}} |
| # CHECK-NEXT: CONSTPOOL_ENTRY 1, %const.0, 4 |
