1 # RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s 2 # 3 # This test tests tracking variables value transferring from one register to another. 4 # This example is altered additionally in order to test transferring from one float register 5 # to another. The altered instructions are labeled below. 6 # 7 # CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1" 8 # CHECK: DBG_VALUE debug-use $r4, debug-use $noreg, ![[ARG1]], !DIExpression(), debug-location 9 # CHECK: $r5 = MOVr killed $r4, 14, $noreg, $noreg, debug-location 10 # CHECK-NEXT: DBG_VALUE debug-use $r5, debug-use $noreg, ![[ARG1]], !DIExpression(), debug-location 11 --- | 12 ; ModuleID = 'live-debug-values-reg-copy.ll' 13 source_filename = "live-debug-values-reg-copy.c" 14 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" 15 target triple = "armv4t--" 16 17 define dso_local arm_aapcscc i32 @foo(i32 %arg1) local_unnamed_addr !dbg !8 { 18 entry: 19 call void @llvm.dbg.value(metadata i32 %arg1, metadata !13, metadata !DIExpression()), !dbg !16 20 %cmp = icmp sgt i32 %arg1, 10, !dbg !16 21 br i1 %cmp, label %if.end, label %if.else, !dbg !16 22 23 if.else: ; preds = %entry 24 %add5 = add nsw i32 %arg1, 10, !dbg !16 25 call void @llvm.dbg.value(metadata i32 %add5, metadata !13, metadata !DIExpression()), !dbg !16 26 %call6 = tail call arm_aapcscc i32 @externFunc2(i32 %add5), !dbg !16 27 %call8 = tail call arm_aapcscc i32 @externFunc(i32 %add5), !dbg !16 28 ret i32 %call6, !dbg !16 29 30 if.end: ; preds = %entry 31 %call = tail call arm_aapcscc i32 @externFunc(i32 %arg1), !dbg !16 32 ret i32 1, !dbg !16 33 } 34 35 declare dso_local arm_aapcscc i32 @externFunc(i32) local_unnamed_addr 36 37 declare dso_local arm_aapcscc i32 @externFunc2(i32) local_unnamed_addr 38 39 ; Function Attrs: nounwind readnone speculatable 40 declare void @llvm.dbg.value(metadata, metadata, metadata) #0 41 42 ; Function Attrs: nounwind 43 declare void @llvm.stackprotector(i8*, i8**) #1 44 45 attributes #0 = { nounwind readnone speculatable } 46 attributes #1 = { nounwind } 47 48 !llvm.dbg.cu = !{!0} 49 !llvm.module.flags = !{!3, !4, !5, !6} 50 !llvm.ident = !{!7} 51 52 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 53 !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/") 54 !2 = !{} 55 !3 = !{i32 2, !"Dwarf Version", i32 4} 56 !4 = !{i32 2, !"Debug Info Version", i32 3} 57 !5 = !{i32 1, !"wchar_size", i32 4} 58 !6 = !{i32 1, !"min_enum_size", i32 4} 59 !7 = !{!"clang version 7.0.0"} 60 !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) 61 !9 = !DISubroutineType(types: !10) 62 !10 = !{!11, !11} 63 !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 64 !12 = !{!13} 65 !13 = !DILocalVariable(name: "arg1", arg: 1, scope: !8, file: !1, line: 4, type: !11) 66 !16 = !DILocation(line: 4, column: 13, scope: !8) 67 68 ... 69 --- 70 name: foo 71 alignment: 2 72 exposesReturnsTwice: false 73 legalized: false 74 regBankSelected: false 75 selected: false 76 tracksRegLiveness: false 77 registers: 78 liveins: 79 - { reg: '$r0', virtual-reg: '' } 80 frameInfo: 81 isFrameAddressTaken: false 82 isReturnAddressTaken: false 83 hasStackMap: false 84 hasPatchPoint: false 85 stackSize: 16 86 offsetAdjustment: 0 87 maxAlignment: 4 88 adjustsStack: true 89 hasCalls: true 90 stackProtector: '' 91 maxCallFrameSize: 0 92 hasOpaqueSPAdjustment: false 93 hasVAStart: false 94 hasMustTailInVarArgFunc: false 95 savePoint: '' 96 restorePoint: '' 97 fixedStack: 98 stack: 99 - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, 100 stack-id: 0, callee-saved-register: '$lr', callee-saved-restored: true, 101 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 102 - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, 103 stack-id: 0, callee-saved-register: '$r11', callee-saved-restored: true, 104 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 105 - { id: 2, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4, 106 stack-id: 0, callee-saved-register: '$r5', callee-saved-restored: true, 107 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 108 - { id: 3, name: '', type: spill-slot, offset: -16, size: 4, alignment: 4, 109 stack-id: 0, callee-saved-register: '$r4', callee-saved-restored: true, 110 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 111 constants: 112 body: | 113 bb.0.entry: 114 successors: %bb.1(0x40000000), %bb.2(0x40000000) 115 116 $sp = frame-setup STMDB_UPD $sp, 14, $noreg, killed $r4, killed $r5, killed $r11, killed $lr 117 frame-setup CFI_INSTRUCTION def_cfa_offset 16 118 frame-setup CFI_INSTRUCTION offset $lr, -4 119 frame-setup CFI_INSTRUCTION offset $r11, -8 120 frame-setup CFI_INSTRUCTION offset $r5, -12 121 frame-setup CFI_INSTRUCTION offset $r4, -16 122 DBG_VALUE debug-use $r0, debug-use $noreg, !13, !DIExpression(), debug-location !16 123 DBG_VALUE debug-use $r0, debug-use $noreg, !13, !DIExpression(), debug-location !16 124 CMPri renamable $r0, 10, 14, $noreg, implicit-def $cpsr, debug-location !16 125 Bcc %bb.2, 13, killed $cpsr, debug-location !16 126 127 bb.1.if.end: 128 BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16 129 $r0 = MOVi 1, 14, $noreg, $noreg, debug-location !16 130 $sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16 131 BX_RET 14, $noreg, implicit killed $r0, debug-location !16 132 133 bb.2.if.else: 134 renamable $r4 = ADDri killed renamable $r0, 10, 14, $noreg, $noreg, debug-location !16 135 DBG_VALUE debug-use $r4, debug-use $noreg, !13, !DIExpression(), debug-location !16 136 $r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16 137 BL @externFunc2, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def $r0, debug-location !16 138 $r5 = MOVr killed $r0, 14, $noreg, $noreg, debug-location !16 139 $r0 = MOVr $r4, 14, $noreg, $noreg, debug-location !16 140 BL @externFunc, csr_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit-def $sp, implicit-def dead $r0, debug-location !16 141 $r0 = MOVr killed $r5, 14, $noreg, $noreg, debug-location !16 142 ; Instruction below is added in order to test moving variable's value from one register to another. 143 $r5 = MOVr killed $r4, 14, $noreg, $noreg, debug-location !16 144 $sp = LDMIA_UPD $sp, 14, $noreg, def $r4, def $r5, def $r11, def $lr, debug-location !16 145 BX_RET 14, $noreg, implicit killed $r0, debug-location !16 146 147 ... 148
