| # RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s |
| # |
| # This test tests tracking variables value transferring from one register to another. |
| # This example is altered additionally in order to test transferring from one float register |
| # to another. The altered instructions are labeled below. |
| # |
| # CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1" |
| # CHECK: DBG_VALUE $r4, $noreg, ![[ARG1]], !DIExpression(), debug-location |
| # CHECK: $r5 = MOVr killed $r4, 14 /* CC::al */, $noreg, $noreg, debug-location |
| # CHECK-NEXT: DBG_VALUE $r5, $noreg, ![[ARG1]], !DIExpression(), debug-location |
| --- | |
| ; ModuleID = 'live-debug-values-reg-copy.ll' |
| source_filename = "live-debug-values-reg-copy.c" |
| target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" |
| target triple = "armv4t--" |
| |
| define dso_local arm_aapcscc i32 @foo(i32 %arg1) local_unnamed_addr !dbg !8 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %arg1, metadata !13, metadata !DIExpression()), !dbg !16 |
| %cmp = icmp sgt i32 %arg1, 10, !dbg !16 |
| br i1 %cmp, label %if.end, label %if.else, !dbg !16 |
| |
| if.else: ; preds = %entry |
| %add5 = add nsw i32 %arg1, 10, !dbg !16 |
| call void @llvm.dbg.value(metadata i32 %add5, metadata !13, metadata !DIExpression()), !dbg !16 |
| %call6 = tail call arm_aapcscc i32 @externFunc2(i32 %add5), !dbg !16 |
| %call8 = tail call arm_aapcscc i32 @externFunc(i32 %add5), !dbg !16 |
| ret i32 %call6, !dbg !16 |
| |
| if.end: ; preds = %entry |
| %call = tail call arm_aapcscc i32 @externFunc(i32 %arg1), !dbg !16 |
| ret i32 1, !dbg !16 |
| } |
| |
| declare dso_local arm_aapcscc i32 @externFunc(i32) local_unnamed_addr |
| |
| declare dso_local arm_aapcscc i32 @externFunc2(i32) local_unnamed_addr |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #0 |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) #1 |
| |
| attributes #0 = { nounwind readnone speculatable } |
| attributes #1 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{i32 1, !"min_enum_size", i32 4} |
| !7 = !{!"clang version 7.0.0"} |
| !8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !9, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12) |
| !9 = !DISubroutineType(types: !10) |
| !10 = !{!11, !11} |
| !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !12 = !{!13} |
| !13 = !DILocalVariable(name: "arg1", arg: 1, scope: !8, file: !1, line: 4, type: !11) |
| !16 = !DILocation(line: 4, column: 13, scope: !8) |
| |
| ... |
| --- |
| name: foo |
| alignment: 4 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| tracksRegLiveness: 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: '' |
| maxCallFrameSize: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$r11', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 2, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$r5', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 3, name: '', type: spill-slot, offset: -16, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| constants: |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000), %bb.2(0x40000000) |
| |
| $sp = frame-setup STMDB_UPD $sp, 14, $noreg, killed $r4, killed $r5, killed $r11, killed $lr |
| frame-setup CFI_INSTRUCTION def_cfa_offset 16 |
| frame-setup CFI_INSTRUCTION offset $lr, -4 |
| frame-setup CFI_INSTRUCTION offset $r11, -8 |
| frame-setup CFI_INSTRUCTION offset $r5, -12 |
| frame-setup CFI_INSTRUCTION offset $r4, -16 |
| DBG_VALUE $r0, $noreg, !13, !DIExpression(), debug-location !16 |
| DBG_VALUE $r0, $noreg, !13, !DIExpression(), debug-location !16 |
| CMPri renamable $r0, 10, 14, $noreg, implicit-def $cpsr, debug-location !16 |
| Bcc %bb.2, 13, killed $cpsr, debug-location !16 |
| |
| bb.1.if.end: |
| BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16 |
| $r0 = MOVi 1, 14, $noreg, $noreg, debug-location !16 |
| $sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16 |
| BX_RET 14, $noreg, implicit killed $r0, debug-location !16 |
| |
| bb.2.if.else: |
| renamable $r4 = ADDri killed renamable $r0, 10, 14, $noreg, $noreg, debug-location !16 |
| DBG_VALUE $r4, $noreg, !13, !DIExpression(), debug-location !16 |
| $r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16 |
| BL @externFunc2, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def $r0, debug-location !16 |
| $r5 = MOVr killed $r0, 14, $noreg, $noreg, debug-location !16 |
| $r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16 |
| BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16 |
| $r0 = MOVr killed $r5, 14, $noreg, $noreg, debug-location !16 |
| ; Instruction below is added in order to test moving variable's value from one register to another. |
| $r5 = MOVr killed $r4, 14, $noreg, $noreg, debug-location !16 |
| $sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16 |
| BX_RET 14, $noreg, implicit killed $r0, debug-location !16 |
| |
| ... |
