1 # RUN: llc -debug-entry-values -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s --check-prefixes=CHECK,VARLOCLDV
2 # RUN: llc -debug-entry-values -force-instr-ref-livedebugvalues=1 -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s --check-prefixes=CHECK,INSTRREFLDV
4 # The test case was artificially adjusted, in order to make proper diamond basic
5 # block structure relevant to the debug entry values clobbering.
7 # CHECK: ![[ARG_B:.*]] = !DILocalVariable(name: "b"
9 # CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
11 # CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
12 # CHECK: $ebx = MOV32rr $esi
13 # CHECK-NEXT: DBG_VALUE $ebx, $noreg, ![[ARG_B]], !DIExpression()
14 # CHECK-NEXT: $esi = MOV32ri 5
15 # CHECK-NEXT: $ebx = MOV32ri 1
16 # CHECK-NEXT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
18 # CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
19 # CHECK: $ebp = MOV32rr $esi
20 # CHECK: DBG_VALUE $ebp, $noreg, ![[ARG_B]], !DIExpression()
21 # CHECK-NEXT: $esi = MOV32ri 1
22 # CHECK-NEXT: $ebp = MOV32ri 2
23 # CHECK-NEXT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
25 # VARLOCLDV-NOT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
26 # INSTRREFLDV: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
28 ## Final two lines: VarLoc LiveDebugValues cannot determine that the DBG_VALUEs
29 ## down either path of the diamond set the variable to be its original value,
30 ## wheras instruction referencing LiveDebugValues can.
34 source_filename = "test.c"
35 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
36 target triple = "x86_64-unknown-linux-gnu"
38 ; Function Attrs: noinline nounwind uwtable
39 define dso_local i32 @fn2(i32 %a, i32 %b, i32 %c) local_unnamed_addr !dbg !12 {
41 call void @llvm.dbg.value(metadata i32 %a, metadata !16, metadata !DIExpression()), !dbg !20
42 call void @llvm.dbg.value(metadata i32 %b, metadata !17, metadata !DIExpression()), !dbg !20
43 call void @llvm.dbg.value(metadata i32 %c, metadata !18, metadata !DIExpression()), !dbg !20
44 %add = add nsw i32 %a, 2, !dbg !21
45 call void @llvm.dbg.value(metadata i32 %add, metadata !19, metadata !DIExpression()), !dbg !20
46 tail call void @fn1(i32 5, i32 6, i32 %add), !dbg !22
47 %cmp = icmp slt i32 %b, 17, !dbg !23
48 br i1 %cmp, label %if.then, label %if.else, !dbg !25
50 if.then: ; preds = %entry
51 %add1 = add nsw i32 %b, 7, !dbg !26
52 call void @llvm.dbg.value(metadata i32 %add1, metadata !17, metadata !DIExpression()), !dbg !20
53 tail call void @fn1(i32 5, i32 %add1, i32 %c), !dbg !28
54 br label %if.end, !dbg !29
56 if.else: ; preds = %entry
57 %add2 = add nuw nsw i32 %b, 1, !dbg !30
58 call void @llvm.dbg.value(metadata i32 %add2, metadata !17, metadata !DIExpression()), !dbg !20
59 tail call void @fn1(i32 1, i32 %add2, i32 %c), !dbg !32
62 if.end: ; preds = %if.else, %if.then
63 %b.addr.0 = phi i32 [ %add1, %if.then ], [ %add2, %if.else ], !dbg !33
64 call void @llvm.dbg.value(metadata i32 %b.addr.0, metadata !17, metadata !DIExpression()), !dbg !20
65 ret i32 %b.addr.0, !dbg !34
68 declare !dbg !4 dso_local void @fn1(i32, i32, i32) local_unnamed_addr
70 ; Function Attrs: nounwind readnone speculatable willreturn
71 declare void @llvm.dbg.value(metadata, metadata, metadata)
74 !llvm.module.flags = !{!8, !9, !10}
77 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
78 !1 = !DIFile(filename: "test.c", directory: "/dir")
81 !4 = !DISubprogram(name: "fn1", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
82 !5 = !DISubroutineType(types: !6)
83 !6 = !{null, !7, !7, !7}
84 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
85 !8 = !{i32 2, !"Dwarf Version", i32 4}
86 !9 = !{i32 2, !"Debug Info Version", i32 3}
87 !10 = !{i32 1, !"wchar_size", i32 4}
88 !11 = !{!"clang version 10.0.0"}
89 !12 = distinct !DISubprogram(name: "fn2", scope: !1, file: !1, line: 5, type: !13, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
90 !13 = !DISubroutineType(types: !14)
91 !14 = !{!7, !7, !7, !7}
92 !15 = !{!16, !17, !18, !19}
93 !16 = !DILocalVariable(name: "a", arg: 1, scope: !12, file: !1, line: 5, type: !7)
94 !17 = !DILocalVariable(name: "b", arg: 2, scope: !12, file: !1, line: 5, type: !7)
95 !18 = !DILocalVariable(name: "c", arg: 3, scope: !12, file: !1, line: 5, type: !7)
96 !19 = !DILocalVariable(name: "q", scope: !12, file: !1, line: 7, type: !7)
97 !20 = !DILocation(line: 0, scope: !12)
98 !21 = !DILocation(line: 7, column: 15, scope: !12)
99 !22 = !DILocation(line: 9, column: 5, scope: !12)
100 !23 = !DILocation(line: 11, column: 11, scope: !24)
101 !24 = distinct !DILexicalBlock(scope: !12, file: !1, line: 11, column: 9)
102 !25 = !DILocation(line: 11, column: 9, scope: !12)
103 !26 = !DILocation(line: 12, column: 13, scope: !27)
104 !27 = distinct !DILexicalBlock(scope: !24, file: !1, line: 11, column: 17)
105 !28 = !DILocation(line: 13, column: 8, scope: !27)
106 !29 = !DILocation(line: 14, column: 5, scope: !27)
107 !30 = !DILocation(line: 15, column: 13, scope: !31)
108 !31 = distinct !DILexicalBlock(scope: !24, file: !1, line: 14, column: 12)
109 !32 = !DILocation(line: 16, column: 7, scope: !31)
110 !33 = !DILocation(line: 0, scope: !24)
111 !34 = !DILocation(line: 19, column: 5, scope: !12)
118 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
119 callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '',
120 debug-info-expression: '', debug-info-location: '' }
121 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
122 callee-saved-register: '$rbp', callee-saved-restored: true, debug-info-variable: '',
123 debug-info-expression: '', debug-info-location: '' }
126 successors: %bb.1(0x40000000), %bb.2(0x40000000)
127 liveins: $edi, $edx, $esi, $rbp, $rbx
129 DBG_VALUE $edi, $noreg, !16, !DIExpression(), debug-location !20
130 DBG_VALUE $esi, $noreg, !17, !DIExpression(), debug-location !20
131 DBG_VALUE $edx, $noreg, !18, !DIExpression(), debug-location !20
132 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
133 CFI_INSTRUCTION def_cfa_offset 16
134 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
135 CFI_INSTRUCTION def_cfa_offset 24
136 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
137 CFI_INSTRUCTION def_cfa_offset 32
138 CFI_INSTRUCTION offset $rbx, -24
139 CFI_INSTRUCTION offset $rbp, -16
141 DBG_VALUE $ebp, $noreg, !18, !DIExpression(), debug-location !20
142 renamable $edi = KILL $edi, implicit-def $rdi
143 DBG_VALUE $edi, $noreg, !16, !DIExpression(), debug-location !20
144 renamable $edx = LEA64_32r killed renamable $rdi, 1, $noreg, 2, $noreg, debug-location !21
145 DBG_VALUE $edx, $noreg, !19, !DIExpression(), debug-location !20
146 $edi = MOV32ri 5, debug-location !22
147 CMP32ri8 renamable $ebp, 16, implicit-def $eflags, debug-location !23
148 JCC_1 %bb.2, 15, implicit killed $eflags, debug-location !25
151 successors: %bb.3(0x80000000)
152 liveins: $ebp, $ebx, $esi
155 DBG_VALUE $ebx, $noreg, !17, !DIExpression(), debug-location !20
156 $esi = MOV32ri 5, debug-location !28
161 successors: %bb.3(0x80000000)
162 liveins: $ebp, $ebx, $esi
165 DBG_VALUE $ebp, $noreg, !17, !DIExpression(), debug-location !20
166 $esi = MOV32ri 1, debug-location !32
170 liveins: $ebx, $edi, $ebp
172 $esi = MOV32rr $ebx, debug-location !33
173 $edx = MOV32rr killed $ebp, debug-location !33
174 CALL64pcrel32 @fn1, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit $esi, implicit $edx, implicit-def $rsp, implicit-def $ssp, debug-location !33
175 DBG_VALUE $ebx, $noreg, !17, !DIExpression(), debug-location !20
176 $eax = MOV32rr killed $ebx, debug-location !34
177 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !34
178 CFI_INSTRUCTION def_cfa_offset 24, debug-location !34
179 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !34
180 CFI_INSTRUCTION def_cfa_offset 16, debug-location !34
181 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !34
182 CFI_INSTRUCTION def_cfa_offset 8, debug-location !34
183 RETQ killed $eax, debug-location !34