| # RUN: llc -run-pass=prologepilog %s -o - | FileCheck %s |
| # Tests to check that CPSR is saved and restored if live when we emit tMOVi32imm |
| # to resolve a frame offset. |
| |
| --- | |
| target triple = "thumbv6m-arm-none-eabi" |
| |
| define void @test_def_in_block(i32 %x) #0 { |
| entry: |
| %var = alloca i32, align 4 |
| %dummy = alloca [2048 x i8], align 1 |
| %cmp = icmp eq i32 %x, 0 |
| store i32 %x, ptr %var, align 4 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: |
| br label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| define void @test_live_in(i32 %x) #0 { |
| entry: |
| %var = alloca i32, align 4 |
| %dummy = alloca [2048 x i8], align 1 |
| %cmp = icmp eq i32 %x, 0 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: |
| store i32 %x, ptr %var, align 4 |
| %cmp1 = icmp slt i32 %x, 0 |
| br i1 %cmp1, label %if.then2, label %if.end |
| |
| if.then2: |
| br label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| define void @test_live_out(i32 %x) #0 { |
| entry: |
| %var = alloca i32, align 4 |
| %dummy = alloca [2048 x i8], align 1 |
| %cmp = icmp eq i32 %x, 0 |
| store i32 %x, ptr %var, align 4 |
| br label %if.then |
| |
| if.then: |
| br i1 %cmp, label %if.then2, label %if.end |
| |
| if.then2: |
| br label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| define void @test_live_out_def_after_mov(i32 %x) #0 { |
| entry: |
| %var = alloca i32, align 4 |
| %dummy = alloca [2048 x i8], align 1 |
| store i32 %x, ptr %var, align 4 |
| %cmp = icmp eq i32 %x, 0 |
| br label %if.then |
| |
| if.then: |
| br i1 %cmp, label %if.then2, label %if.end |
| |
| if.then2: |
| br label %if.end |
| |
| if.end: |
| ret void |
| } |
| |
| attributes #0 = { "target-features"="+execute-only" } |
| ... |
| --- |
| name: test_def_in_block |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: 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: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 2052 |
| savePoint: [] |
| restorePoint: [] |
| fixedStack: [] |
| stack: |
| - { id: 0, name: var, type: default, offset: 0, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -4, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 1, name: dummy, type: default, offset: 0, size: 2048, alignment: 1, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -2052, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| entry_values: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000), %bb.2(0x40000000) |
| liveins: $r0 |
| |
| ; CHECK-LABEL: name: test_def_in_block |
| ; CHECK-LABEL: bb.0.entry: |
| ; CHECK: tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| ; CHECK-NEXT: $r2 = t2MRS_M 2048, 14 /* CC::al */, $noreg, implicit $cpsr |
| ; CHECK-NEXT: $r1 = tMOVi32imm 2048, implicit-def $cpsr |
| ; CHECK-NEXT: t2MSR_M 2048, killed $r2, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| ; CHECK-NEXT: $r1 = tADDhirr $r1, killed $sp, 14 /* CC::al */, $noreg |
| ; CHECK-NEXT: tSTRi renamable $r0, killed $r1, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| |
| tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| tSTRspi renamable $r0, %stack.0.var, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| tBcc %bb.1, 1 /* CC::ne */, killed $cpsr |
| tB %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.1.if.then: |
| successors: %bb.2(0x80000000) |
| |
| tB %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.2.if.end: |
| tBX_RET 14 /* CC::al */, $noreg |
| |
| ... |
| --- |
| name: test_live_in |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| callsEHReturn: false |
| callsUnwindInit: false |
| hasEHContTarget: false |
| hasEHScopes: false |
| hasEHFunclets: false |
| isOutlined: false |
| debugInstrRef: false |
| failsVerification: false |
| tracksDebugUserValues: false |
| registers: [] |
| liveins: |
| - { reg: '$r0', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 2052 |
| savePoint: [] |
| restorePoint: [] |
| fixedStack: [] |
| stack: |
| - { id: 0, name: var, type: default, offset: 0, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -4, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 1, name: dummy, type: default, offset: 0, size: 2048, alignment: 1, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -2052, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| entry_values: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000), %bb.3(0x40000000) |
| liveins: $r0 |
| |
| tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| tBcc %bb.3, 1 /* CC::ne */, $cpsr |
| tB %bb.1, 14 /* CC::al */, $noreg |
| |
| bb.1.if.then: |
| successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| liveins: $r0, $cpsr |
| |
| ; CHECK-LABEL: name: test_live_in |
| ; CHECK-LABEL: bb.1.if.then: |
| ; CHECK: $r2 = t2MRS_M 2048, 14 /* CC::al */, $noreg, implicit $cpsr |
| ; CHECK-NEXT: $r1 = tMOVi32imm 2048, implicit-def $cpsr |
| ; CHECK-NEXT: t2MSR_M 2048, killed $r2, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| ; CHECK-NEXT: $r1 = tADDhirr $r1, killed $sp, 14 /* CC::al */, $noreg |
| ; CHECK-NEXT: tSTRi renamable $r0, killed $r1, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| |
| tSTRspi renamable $r0, %stack.0.var, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| tBcc %bb.3, 5 /* CC::pl */, killed $cpsr |
| tB %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.2.if.then2: |
| successors: %bb.3(0x80000000) |
| |
| tB %bb.3, 14 /* CC::al */, $noreg |
| |
| bb.3.if.end: |
| tBX_RET 14 /* CC::al */, $noreg |
| |
| ... |
| --- |
| name: test_live_out |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| callsEHReturn: false |
| callsUnwindInit: false |
| hasEHContTarget: false |
| hasEHScopes: false |
| hasEHFunclets: false |
| isOutlined: false |
| debugInstrRef: false |
| failsVerification: false |
| tracksDebugUserValues: false |
| registers: [] |
| liveins: |
| - { reg: '$r0', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 2052 |
| savePoint: [] |
| restorePoint: [] |
| fixedStack: [] |
| stack: |
| - { id: 0, name: var, type: default, offset: 0, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -4, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 1, name: dummy, type: default, offset: 0, size: 2048, alignment: 1, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -2052, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| entry_values: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000) |
| liveins: $r0 |
| |
| ; CHECK-LABEL: name: test_live_out |
| ; CHECK-LABEL: bb.0.entry: |
| ; CHECK: tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| ; CHECK-NEXT: $r2 = t2MRS_M 2048, 14 /* CC::al */, $noreg, implicit $cpsr |
| ; CHECK-NEXT: $r1 = tMOVi32imm 2048, implicit-def $cpsr |
| ; CHECK-NEXT: t2MSR_M 2048, killed $r2, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| ; CHECK-NEXT: $r1 = tADDhirr $r1, killed $sp, 14 /* CC::al */, $noreg |
| ; CHECK-NEXT: tSTRi renamable $r0, killed $r1, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| |
| tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| tSTRspi renamable $r0, %stack.0.var, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| tB %bb.1, 14 /* CC::al */, $noreg |
| |
| bb.1.if.then: |
| successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| liveins: $cpsr |
| |
| tBcc %bb.3, 5 /* CC::pl */, killed $cpsr |
| tB %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.2.if.then2: |
| successors: %bb.3(0x80000000) |
| |
| tB %bb.3, 14 /* CC::al */, $noreg |
| |
| bb.3.if.end: |
| tBX_RET 14 /* CC::al */, $noreg |
| |
| ... |
| --- |
| name: test_live_out_def_after_mov |
| alignment: 2 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| callsEHReturn: false |
| callsUnwindInit: false |
| hasEHContTarget: false |
| hasEHScopes: false |
| hasEHFunclets: false |
| isOutlined: false |
| debugInstrRef: false |
| failsVerification: false |
| tracksDebugUserValues: false |
| registers: [] |
| liveins: |
| - { reg: '$r0', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 2052 |
| savePoint: [] |
| restorePoint: [] |
| fixedStack: [] |
| stack: |
| - { id: 0, name: var, type: default, offset: 0, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -4, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| - { id: 1, name: dummy, type: default, offset: 0, size: 2048, alignment: 1, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| local-offset: -2052, debug-info-variable: '', debug-info-expression: '', |
| debug-info-location: '' } |
| entry_values: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000) |
| liveins: $r0 |
| |
| ; Here the live-out cpsr is defined after the tMOVi32imm, so cpsr doesn't |
| ; need to be saved. |
| ; CHECK-LABEL: name: test_live_out |
| ; CHECK-LABEL: bb.0.entry: |
| ; CHECK: $r1 = tMOVi32imm 2048, implicit-def $cpsr |
| ; CHECK-NEXT: $r1 = tADDhirr $r1, killed $sp, 14 /* CC::al */, $noreg |
| ; CHECK-NEXT: tSTRi renamable $r0, killed $r1, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| ; CHECK-NEXT: tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| |
| tSTRspi renamable $r0, %stack.0.var, 0, 14 /* CC::al */, $noreg :: (store (s32) into %ir.var) |
| tCMPi8 renamable $r0, 0, 14 /* CC::al */, $noreg, implicit-def $cpsr |
| tB %bb.1, 14 /* CC::al */, $noreg |
| |
| bb.1.if.then: |
| successors: %bb.2(0x40000000), %bb.3(0x40000000) |
| liveins: $cpsr |
| |
| tBcc %bb.3, 5 /* CC::pl */, killed $cpsr |
| tB %bb.2, 14 /* CC::al */, $noreg |
| |
| bb.2.if.then2: |
| successors: %bb.3(0x80000000) |
| |
| tB %bb.3, 14 /* CC::al */, $noreg |
| |
| bb.3.if.end: |
| tBX_RET 14 /* CC::al */, $noreg |
| |
| ... |
