1 # RUN: llc -start-before=livedebugvalues %s -filetype=asm -o -| FileCheck %s
3 # DbgEntityHistoryCalculator should close variable's range at the end of
4 # the basic block when variable is referenced through non-changing frame
5 # pointer register. Having BB1 that branches to BB2 and BB3, where
6 # BB2 falls through to BB3, variable can have different locations at BB1 and BB2.
7 # Since input locations at BB3 for same variable are different LiveDebugValues
8 # wont generate DBG_VALUE for BB3. If last variable location at BB2 is
9 # non-changing register, DbgEntityHistoryCalculator will extend range of
10 # DBG_VALUE from BB2 to whole BB3 and thus produce incorrect range for
11 # case when we took branch BB3 from BB1.
13 # Verifies that "local1" stack location is ended at the end of the block (.Ltmp6).
16 # CHECK-NEXT: #DEBUG_VALUE: foo:local1 <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $rbp
21 # CHECK: .Ldebug_loc2:
22 # CHECK-NEXT: .quad .Ltmp1-.Lfunc_begin0
23 # CHECK-NEXT: .quad .Ltmp4-.Lfunc_begin0
24 # CHECK-NEXT: .short 1 # Loc expr size
25 # CHECK-NEXT: .byte 94 # super-register DW_OP_reg14
26 # CHECK-NEXT: .quad .Ltmp4-.Lfunc_begin0
27 # CHECK-NEXT: .quad .Ltmp6-.Lfunc_begin0
28 # CHECK-NEXT: .short 2 # Loc expr size
29 # CHECK-NEXT: .byte 118 # DW_OP_breg6
30 # CHECK-NEXT: .byte 124 # -4
32 # CHECK: .long .Ldebug_loc2 # DW_AT_location
33 # CHECK-NEXT: .long .Linfo_string7 # DW_AT_name
35 # CHECK: .Linfo_string7:
36 # CHECK-NEXT: .asciz "local1"
38 ; ModuleID = 'dbg-stack-value-range.ll'
39 source_filename = "dbg-stack-value-range.c"
40 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
41 target triple = "x86_64-unknown-linux-gnu"
43 ; Function Attrs: nounwind uwtable
44 define dso_local i32 @foo(i32 %X) local_unnamed_addr #0 !dbg !7 {
46 %local1 = alloca i32, align 4
47 call void @llvm.dbg.value(metadata i32 %X, metadata !12, metadata !DIExpression()), !dbg !15
48 %0 = bitcast i32* %local1 to i8*, !dbg !15
49 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15
50 call void @llvm.dbg.value(metadata i32 5, metadata !14, metadata !DIExpression()), !dbg !15
51 %call = tail call i32 (...) @check(), !dbg !15
52 %tobool = icmp eq i32 %call, 0, !dbg !15
53 br i1 %tobool, label %if.else, label %if.then, !dbg !15
55 if.then: ; preds = %entry
56 call void @llvm.dbg.value(metadata i32 4, metadata !13, metadata !DIExpression()), !dbg !15
57 store i32 4, i32* %local1, align 4, !dbg !15, !tbaa !16
58 call void @llvm.dbg.value(metadata i32* %local1, metadata !13, metadata !DIExpression(DW_OP_deref)), !dbg !15
59 %call1 = call i32 @init(i32* nonnull %local1), !dbg !15
60 call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15
61 br label %if.end, !dbg !15
63 if.else: ; preds = %entry
64 call void @llvm.dbg.value(metadata i32 5, metadata !13, metadata !DIExpression()), !dbg !15
65 store i32 5, i32* %local1, align 4, !dbg !15, !tbaa !16
68 if.end: ; preds = %if.else, %if.then
69 %1 = bitcast i32* %local1 to i8*, !dbg !15
70 call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15
71 %call2 = call i32 (...) @init2(), !dbg !15
72 call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !15
73 %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !16
74 call void @llvm.dbg.value(metadata i32 %2, metadata !13, metadata !DIExpression()), !dbg !15
75 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %1), !dbg !15
79 ; Function Attrs: argmemonly nounwind
80 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
82 declare dso_local i32 @check(...) local_unnamed_addr
84 declare dso_local i32 @init(i32*) local_unnamed_addr
86 declare dso_local i32 @init2(...) local_unnamed_addr
88 ; Function Attrs: argmemonly nounwind
89 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
91 ; Function Attrs: nounwind readnone speculatable
92 declare void @llvm.dbg.value(metadata, metadata, metadata)
94 ; Function Attrs: nounwind
95 declare void @llvm.stackprotector(i8*, i8**)
97 attributes #0 = { nounwind uwtable "frame-pointer"="non-leaf" }
100 !llvm.module.flags = !{!3, !4, !5}
103 !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)
104 !1 = !DIFile(filename: "dbg-stack-value-range.c", directory: "/")
106 !3 = !{i32 2, !"Dwarf Version", i32 4}
107 !4 = !{i32 2, !"Debug Info Version", i32 3}
108 !5 = !{i32 1, !"wchar_size", i32 4}
109 !6 = !{!"clang version 9.0.0"}
110 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 11, type: !8, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
111 !8 = !DISubroutineType(types: !9)
113 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
114 !11 = !{!12, !13, !14}
115 !12 = !DILocalVariable(name: "X", arg: 1, scope: !7, file: !1, line: 11, type: !10)
116 !13 = !DILocalVariable(name: "local1", scope: !7, file: !1, line: 12, type: !10)
117 !14 = !DILocalVariable(name: "local2", scope: !7, file: !1, line: 12, type: !10)
118 !15 = !DILocation(line: 11, column: 13, scope: !7)
119 !16 = !{!17, !17, i64 0}
120 !17 = !{!"int", !18, i64 0}
121 !18 = !{!"omnipotent char", !19, i64 0}
122 !19 = !{!"Simple C/C++ TBAA"}
130 offsetAdjustment: -24
135 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
136 callee-saved-register: '$r14d', callee-saved-restored: true, debug-info-variable: '',
137 debug-info-expression: '', debug-info-location: '' }
139 - { id: 0, name: local1, type: default, offset: -20, size: 4, alignment: 4,
140 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
141 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
144 successors: %bb.3(0x30000000), %bb.1(0x50000000)
146 DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15
147 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
148 CFI_INSTRUCTION def_cfa_offset 16
149 CFI_INSTRUCTION offset $rbp, -16
150 $rbp = frame-setup MOV64rr $rsp
151 CFI_INSTRUCTION def_cfa_register $rbp
152 $rsp = frame-setup SUB64ri8 $rsp, 16, implicit-def dead $eflags
153 DBG_VALUE 5, $noreg, !14, !DIExpression(), debug-location !15
154 $r14d = MOV32ri 4, implicit-def $r14
155 DBG_VALUE $r14d, $noreg, !13, !DIExpression(), debug-location !15
156 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !15
157 CALL64pcrel32 @check, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
158 TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !15
159 JCC_1 %bb.3, 4, implicit killed $eflags, debug-location !15
162 successors: %bb.3(0x80000000)
164 MOV32mr $rbp, 1, $noreg, -4, $noreg, $r14d, debug-location !15 :: (store (s32) into %ir.local1, !tbaa !16)
165 DBG_VALUE $rbp, $noreg, !13, !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref), debug-location !15
166 renamable $rdi = LEA64r $rbp, 1, $noreg, -4, $noreg
167 CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !15
168 DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15
172 DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15
173 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !15
174 CALL64pcrel32 @init2, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !15
175 DBG_VALUE $noreg, $noreg, !14, !DIExpression(), debug-location !15
176 renamable $eax = MOV32rm $rbp, 1, $noreg, -4, $noreg, debug-location !15 :: (dereferenceable load (s32) from %ir.local1, !tbaa !16)
177 $rsp = frame-destroy ADD64ri8 $rsp, 16, implicit-def dead $eflags, debug-location !15
178 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
179 CFI_INSTRUCTION def_cfa $rsp, 8, debug-location !15
180 RETQ $eax, debug-location !15