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 $ebx, debug-use $noreg, ![[ARG1]], !DIExpression(), debug-location 9# CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12 10# CHECK-NEXT: DBG_VALUE debug-use $r12d, 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-i64:64-f80:128-n8:16:32:64-S128" 15 target triple = "x86_64-unknown-linux-gnu" 16 17 define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 { 18 entry: 19 %local1 = alloca i32, align 4 20 call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15 21 %0 = bitcast i32* %local1 to i8*, !dbg !15 22 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15 23 call void @init(i32* nonnull %local1), !dbg !15 24 %1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 25 %add = add nsw i32 %1, %arg1, !dbg !15 26 %call = call i32 @coeficient(i32 %add), !dbg !15 27 %cmp = icmp sgt i32 %call, 32, !dbg !15 28 br i1 %cmp, label %if.then, label %if.else, !dbg !15 29 30 if.then: ; preds = %entry 31 %call1 = call i32 @externFunc(i32 %arg1), !dbg !15 32 %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 33 %add2 = add nsw i32 %2, %call1, !dbg !15 34 br label %if.end, !dbg !15 35 36 if.else: ; preds = %entry 37 %call3 = call i32 @externFunc2(i32 %arg1), !dbg !15 38 %3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 39 %add4 = add nsw i32 %3, %call3, !dbg !15 40 br label %if.end 41 42 if.end: ; preds = %if.else, %if.then 43 %storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ] 44 %4 = bitcast i32* %local1 to i8* 45 %mul = shl nsw i32 %arg1, 2, !dbg !15 46 %add5 = add nsw i32 %storemerge, %mul, !dbg !15 47 %mul6 = mul nsw i32 %add5, %call, !dbg !15 48 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15 49 ret i32 %mul6, !dbg !15 50 } 51 52 ; Function Attrs: argmemonly nounwind 53 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0 54 55 declare dso_local void @init(i32*) local_unnamed_addr 56 57 declare dso_local i32 @coeficient(i32) local_unnamed_addr 58 59 declare dso_local i32 @externFunc(i32) local_unnamed_addr 60 61 declare dso_local i32 @externFunc2(i32) local_unnamed_addr 62 63 ; Function Attrs: argmemonly nounwind 64 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0 65 66 ; Function Attrs: nounwind readnone speculatable 67 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 68 69 ; Function Attrs: nounwind 70 declare void @llvm.stackprotector(i8*, i8**) #2 71 72 attributes #0 = { argmemonly nounwind } 73 attributes #1 = { nounwind readnone speculatable } 74 attributes #2 = { nounwind } 75 76 !llvm.dbg.cu = !{!0} 77 !llvm.module.flags = !{!3, !4, !5} 78 !llvm.ident = !{!6} 79 80 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 81 !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/") 82 !2 = !{} 83 !3 = !{i32 2, !"Dwarf Version", i32 4} 84 !4 = !{i32 2, !"Debug Info Version", i32 3} 85 !5 = !{i32 1, !"wchar_size", i32 4} 86 !6 = !{!"clang version 7.0.0 "} 87 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) 88 !8 = !DISubroutineType(types: !9) 89 !9 = !{!10, !10} 90 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 91 !11 = !{!12} 92 !12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10) 93 !15 = !DILocation(line: 6, column: 13, scope: !7) 94 !20 = !{!21, !21, i64 0} 95 !21 = !{!"int", !22, i64 0} 96 !22 = !{!"omnipotent char", !23, i64 0} 97 !23 = !{!"Simple C/C++ TBAA"} 98 99... 100--- 101name: foo 102alignment: 4 103exposesReturnsTwice: false 104legalized: false 105regBankSelected: false 106selected: false 107tracksRegLiveness: true 108registers: 109liveins: 110 - { reg: '$edi', virtual-reg: '' } 111frameInfo: 112 isFrameAddressTaken: false 113 isReturnAddressTaken: false 114 hasStackMap: false 115 hasPatchPoint: false 116 stackSize: 24 117 offsetAdjustment: 0 118 maxAlignment: 4 119 adjustsStack: true 120 hasCalls: true 121 stackProtector: '' 122 maxCallFrameSize: 0 123 hasOpaqueSPAdjustment: false 124 hasVAStart: false 125 hasMustTailInVarArgFunc: false 126 savePoint: '' 127 restorePoint: '' 128fixedStack: 129 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: 0, 130 callee-saved-register: '$rbx', callee-saved-restored: true } 131 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: 0, 132 callee-saved-register: '$rbp', callee-saved-restored: true } 133stack: 134 - { id: 0, name: local1, type: default, offset: -28, size: 4, alignment: 4, 135 stack-id: 0, callee-saved-register: '', callee-saved-restored: true, 136 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 137constants: 138body: | 139 bb.0.entry: 140 successors: %bb.1(0x40000000), %bb.2(0x40000000) 141 liveins: $edi, $rbp, $rbx 142 143 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp 144 CFI_INSTRUCTION def_cfa_offset 16 145 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 146 CFI_INSTRUCTION def_cfa_offset 24 147 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp 148 CFI_INSTRUCTION def_cfa_offset 32 149 CFI_INSTRUCTION offset $rbx, -24 150 CFI_INSTRUCTION offset $rbp, -16 151 DBG_VALUE debug-use $edi, debug-use $noreg, !12, !DIExpression(), debug-location !15 152 $ebx = MOV32rr $edi, implicit-def $rbx 153 DBG_VALUE debug-use $ebx, debug-use $noreg, !12, !DIExpression(), debug-location !15 154 renamable $rdi = LEA64r $rsp, 1, $noreg, 4, $noreg 155 CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15 156 renamable $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20) 157 renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15 158 CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 159 $ebp = MOV32rr $eax, debug-location !15 160 $edi = MOV32rr $ebx, debug-location !15 161 CMP32ri8 renamable $ebp, 33, implicit-def $eflags, debug-location !15 162 JL_1 %bb.2, implicit killed $eflags, debug-location !15 163 164 bb.1.if.then: 165 successors: %bb.3(0x80000000) 166 liveins: $ebp, $edi 167 168 CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 169 JMP_1 %bb.3 170 171 bb.2.if.else: 172 successors: %bb.3(0x80000000) 173 liveins: $ebp, $edi 174 175 CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 176 177 bb.3.if.end: 178 liveins: $ebp, $ebx, $eax 179 ; Instruction below is added in order to test moving variable's value from one register to another. 180 $r12d = MOV32rr killed $ebx, implicit-def $r12 181 renamable $eax = KILL $eax, implicit-def $rax 182 renamable $eax = ADD32rm renamable $eax, $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax :: (dereferenceable load 4 from %ir.local1, !tbaa !20) 183 renamable $eax = LEA64_32r killed renamable $rax, 4, killed renamable $r12, 0, $noreg, debug-location !15 184 renamable $eax = IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15 185 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !15 186 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15 187 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15 188 RETQ $eax, debug-location !15 189 190... 191