# 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
hasEHCatchret: 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 */, $noreg
...
---
name: test_live_in
alignment: 2
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHCatchret: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: false
failsVerification: false
tracksDebugUserValues: false
registers: []
liveins:
- { reg: '$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 */, $noreg
...
---
name: test_live_out
alignment: 2
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHCatchret: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: false
failsVerification: false
tracksDebugUserValues: false
registers: []
liveins:
- { reg: '$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 */, $noreg
...
---
name: test_live_out_def_after_mov
alignment: 2
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
callsEHReturn: false
callsUnwindInit: false
hasEHCatchret: false
hasEHScopes: false
hasEHFunclets: false
isOutlined: false
debugInstrRef: false
failsVerification: false
tracksDebugUserValues: false
registers: []
liveins:
- { reg: '$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
...
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