| # 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 $ebx, $noreg, ![[ARG1]], !DIExpression(), debug-location |
| # CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12 |
| # CHECK-NEXT: DBG_VALUE $r12d, $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-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 { |
| entry: |
| %local1 = alloca i32, align 4 |
| call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15 |
| %0 = bitcast i32* %local1 to i8*, !dbg !15 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15 |
| call void @init(i32* nonnull %local1), !dbg !15 |
| %1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 |
| %add = add nsw i32 %1, %arg1, !dbg !15 |
| %call = call i32 @coeficient(i32 %add), !dbg !15 |
| %cmp = icmp sgt i32 %call, 32, !dbg !15 |
| br i1 %cmp, label %if.then, label %if.else, !dbg !15 |
| |
| if.then: ; preds = %entry |
| %call1 = call i32 @externFunc(i32 %arg1), !dbg !15 |
| %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 |
| %add2 = add nsw i32 %2, %call1, !dbg !15 |
| br label %if.end, !dbg !15 |
| |
| if.else: ; preds = %entry |
| %call3 = call i32 @externFunc2(i32 %arg1), !dbg !15 |
| %3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20 |
| %add4 = add nsw i32 %3, %call3, !dbg !15 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %if.then |
| %storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ] |
| %4 = bitcast i32* %local1 to i8* |
| %mul = shl nsw i32 %arg1, 2, !dbg !15 |
| %add5 = add nsw i32 %storemerge, %mul, !dbg !15 |
| %mul6 = mul nsw i32 %add5, %call, !dbg !15 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15 |
| ret i32 %mul6, !dbg !15 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0 |
| |
| declare dso_local void @init(i32*) local_unnamed_addr |
| |
| declare dso_local i32 @coeficient(i32) local_unnamed_addr |
| |
| declare dso_local i32 @externFunc(i32) local_unnamed_addr |
| |
| declare dso_local i32 @externFunc2(i32) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #1 |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) #2 |
| |
| attributes #0 = { argmemonly nounwind } |
| attributes #1 = { nounwind readnone speculatable } |
| attributes #2 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !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 = !{!"clang version 7.0.0 "} |
| !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) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !{!12} |
| !12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10) |
| !15 = !DILocation(line: 6, column: 13, scope: !7) |
| !20 = !{!21, !21, i64 0} |
| !21 = !{!"int", !22, i64 0} |
| !22 = !{!"omnipotent char", !23, i64 0} |
| !23 = !{!"Simple C/C++ TBAA"} |
| |
| ... |
| --- |
| name: foo |
| alignment: 16 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| tracksRegLiveness: true |
| registers: |
| liveins: |
| - { reg: '$edi', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 24 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default, |
| callee-saved-register: '$rbx', callee-saved-restored: true } |
| - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '$rbp', callee-saved-restored: true } |
| stack: |
| - { id: 0, name: local1, type: default, offset: -28, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', 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) |
| liveins: $edi, $rbp, $rbx |
| |
| frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 24 |
| frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 32 |
| CFI_INSTRUCTION offset $rbx, -24 |
| CFI_INSTRUCTION offset $rbp, -16 |
| DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15 |
| $ebx = MOV32rr $edi, implicit-def $rbx |
| DBG_VALUE $ebx, $noreg, !12, !DIExpression(), debug-location !15 |
| renamable $rdi = LEA64r $rsp, 1, $noreg, 4, $noreg |
| CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15 |
| renamable $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20) |
| renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15 |
| CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 |
| $ebp = MOV32rr $eax, debug-location !15 |
| $edi = MOV32rr $ebx, debug-location !15 |
| CMP32ri8 renamable $ebp, 33, implicit-def $eflags, debug-location !15 |
| JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !15 |
| |
| bb.1.if.then: |
| successors: %bb.3(0x80000000) |
| liveins: $ebp, $edi |
| |
| CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 |
| JMP_1 %bb.3 |
| |
| bb.2.if.else: |
| successors: %bb.3(0x80000000) |
| liveins: $ebp, $edi |
| |
| CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 |
| |
| bb.3.if.end: |
| liveins: $ebp, $ebx, $eax |
| ; Instruction below is added in order to test moving variable's value from one register to another. |
| $r12d = MOV32rr killed $ebx, implicit-def $r12 |
| renamable $eax = KILL $eax, implicit-def $rax |
| 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) |
| renamable $eax = LEA64_32r killed renamable $rax, 4, killed renamable $r12, 0, $noreg, debug-location !15 |
| renamable $eax = IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15 |
| $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !15 |
| $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15 |
| $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15 |
| RETQ $eax, debug-location !15 |
| |
| ... |
