| # RUN: llc -start-before=livedebugvalues %s -filetype=asm -o -| FileCheck %s |
| # |
| # DbgEntityHistoryCalculator should close variable's range at the end of |
| # the basic block when variable is referenced through non-changing frame |
| # pointer register. Having BB1 that branches to BB2 and BB3, where |
| # BB2 falls through to BB3, variable can have different locations at BB1 and BB2. |
| # Since input locations at BB3 for same variable are different LiveDebugValues |
| # wont generate DBG_VALUE for BB3. If last variable location at BB2 is |
| # non-changing register, DbgEntityHistoryCalculator will extend range of |
| # DBG_VALUE from BB2 to whole BB3 and thus produce incorrect range for |
| # case when we took branch BB3 from BB1. |
| # |
| # Verifies that "local1" stack location is ended at the end of the block (.Ltmp6). |
| # |
| # CHECK: .Ltmp4: |
| # CHECK-NEXT: #DEBUG_VALUE: foo:local1 <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $rbp |
| # CHECK: jmp .LBB0_2 |
| # CHECK-NEXT: .Ltmp6: |
| # CHECK: .Lfunc_end0: |
| # |
| # CHECK: .Ldebug_loc2: |
| # CHECK-NEXT: .quad .Ltmp1-.Lfunc_begin0 |
| # CHECK-NEXT: .quad .Ltmp4-.Lfunc_begin0 |
| # CHECK-NEXT: .short 1 # Loc expr size |
| # CHECK-NEXT: .byte 94 # super-register DW_OP_reg14 |
| # CHECK-NEXT: .quad .Ltmp4-.Lfunc_begin0 |
| # CHECK-NEXT: .quad .Ltmp6-.Lfunc_begin0 |
| # CHECK-NEXT: .short 2 # Loc expr size |
| # CHECK-NEXT: .byte 118 # DW_OP_breg6 |
| # CHECK-NEXT: .byte 124 # -4 |
| # |
| # CHECK: .long .Ldebug_loc2 # DW_AT_location |
| # CHECK-NEXT: .long .Linfo_string7 # DW_AT_name |
| # |
| # CHECK: .Linfo_string7: |
| # CHECK-NEXT: .asciz "local1" |
| --- | |
| ; ModuleID = 'dbg-stack-value-range.ll' |
| source_filename = "dbg-stack-value-range.c" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Function Attrs: nounwind uwtable |
| define dso_local i32 @foo(i32 %X) local_unnamed_addr #0 !dbg !7 { |
| entry: |
| %local1 = alloca i32, align 4 |
| call void @llvm.dbg.value(metadata i32 %X, 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 @llvm.dbg.value(metadata i32 5, metadata !14, metadata !DIExpression()), !dbg !15 |
| %call = tail call i32 (...) @check(), !dbg !15 |
| %tobool = icmp eq i32 %call, 0, !dbg !15 |
| br i1 %tobool, label %if.else, label %if.then, !dbg !15 |
| |
| if.then: ; preds = %entry |
| call void @llvm.dbg.value(metadata i32 4, metadata !13, metadata !DIExpression()), !dbg !15 |
| store i32 4, i32* %local1, align 4, !dbg !15, !tbaa !16 |
| call void @llvm.dbg.value(metadata i32* %local1, metadata !13, metadata !DIExpression(DW_OP_deref)), !dbg !15 |
| %call1 = call i32 @init(i32* nonnull %local1), !dbg !15 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15 |
| br label %if.end, !dbg !15 |
| |
| if.else: ; preds = %entry |
| call void @llvm.dbg.value(metadata i32 5, metadata !13, metadata !DIExpression()), !dbg !15 |
| store i32 5, i32* %local1, align 4, !dbg !15, !tbaa !16 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %if.then |
| %1 = bitcast i32* %local1 to i8*, !dbg !15 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15 |
| %call2 = call i32 (...) @init2(), !dbg !15 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15 |
| %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !16 |
| call void @llvm.dbg.value(metadata i32 %2, metadata !13, metadata !DIExpression()), !dbg !15 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %1), !dbg !15 |
| ret i32 %2, !dbg !15 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) |
| |
| declare dso_local i32 @check(...) local_unnamed_addr |
| |
| declare dso_local i32 @init(i32*) local_unnamed_addr |
| |
| declare dso_local i32 @init2(...) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) |
| |
| attributes #0 = { nounwind uwtable "frame-pointer"="non-leaf" } |
| |
| !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 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "dbg-stack-value-range.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 9.0.0"} |
| !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 11, type: !8, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !{!12, !13, !14} |
| !12 = !DILocalVariable(name: "X", arg: 1, scope: !7, file: !1, line: 11, type: !10) |
| !13 = !DILocalVariable(name: "local1", scope: !7, file: !1, line: 12, type: !10) |
| !14 = !DILocalVariable(name: "local2", scope: !7, file: !1, line: 12, type: !10) |
| !15 = !DILocation(line: 11, column: 13, scope: !7) |
| !16 = !{!17, !17, i64 0} |
| !17 = !{!"int", !18, i64 0} |
| !18 = !{!"omnipotent char", !19, i64 0} |
| !19 = !{!"Simple C/C++ TBAA"} |
| |
| ... |
| --- |
| name: foo |
| alignment: 16 |
| frameInfo: |
| stackSize: 24 |
| offsetAdjustment: -24 |
| maxAlignment: 4 |
| adjustsStack: true |
| hasCalls: true |
| fixedStack: |
| - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '$r14d', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| stack: |
| - { id: 0, name: local1, type: default, offset: -20, size: 4, alignment: 4, |
| stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| body: | |
| bb.0.entry: |
| successors: %bb.3(0x30000000), %bb.1(0x50000000) |
| |
| DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15 |
| frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| CFI_INSTRUCTION offset $rbp, -16 |
| $rbp = frame-setup MOV64rr $rsp |
| CFI_INSTRUCTION def_cfa_register $rbp |
| $rsp = frame-setup SUB64ri8 $rsp, 16, implicit-def dead $eflags |
| DBG_VALUE 5, $noreg, !14, !DIExpression(), debug-location !15 |
| $r14d = MOV32ri 4, implicit-def $r14 |
| DBG_VALUE $r14d, $noreg, !13, !DIExpression(), debug-location !15 |
| dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !15 |
| CALL64pcrel32 @check, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15 |
| TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !15 |
| JCC_1 %bb.3, 4, implicit killed $eflags, debug-location !15 |
| |
| bb.1.if.then: |
| successors: %bb.3(0x80000000) |
| |
| MOV32mr $rbp, 1, $noreg, -4, $noreg, $r14d, debug-location !15 :: (store 4 into %ir.local1, !tbaa !16) |
| DBG_VALUE $rbp, $noreg, !13, !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref), debug-location !15 |
| renamable $rdi = LEA64r $rbp, 1, $noreg, -4, $noreg |
| CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !15 |
| DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15 |
| JMP_1 %bb.3 |
| |
| bb.3.if.end: |
| DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15 |
| dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !15 |
| CALL64pcrel32 @init2, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !15 |
| DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15 |
| renamable $eax = MOV32rm $rbp, 1, $noreg, -4, $noreg, debug-location !15 :: (dereferenceable load 4 from %ir.local1, !tbaa !16) |
| $rsp = frame-destroy ADD64ri8 $rsp, 16, implicit-def dead $eflags, debug-location !15 |
| $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15 |
| CFI_INSTRUCTION def_cfa $rsp, 8, debug-location !15 |
| RETQ $eax, debug-location !15 |
| |
| ... |
