1--- |
2  ; RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
3  ; Created from:
4  ; void sink(int a);
5  ; void __attribute((always_inline)) f(int a) { sink(a); }
6  ; void foo(int i) {
7  ;   f(i);
8  ;   if (i)
9  ;     f(i);
10  ;   f(i);
11  ; }
12  ;
13  ; This test verifies that LiveDebugValues doesn't propagate DBG_VALUEs into
14  ; basic blocks that are beyond the scope of the source variable.
15  ;
16  ; CHECK: ![[F_SP:[0-9]+]] = distinct !DISubprogram(name: "f", {{.*}})
17  ; CHECK: ![[A_VAR:[0-9]+]] = !DILocalVariable(name: "a",{{.*}})
18  ; CHECK: ![[I_VAR:[0-9]+]] = !DILocalVariable(name: "i",{{.*}})
19  ; CHECK: ![[I_LOC:[0-9]+]] = !DILocation(line: 4, column: 14, scope: !{{[0-9]+}})
20  ; CHECK: ![[INLCS1:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS1:[0-9]+]])
21  ; CHECK: ![[CS1]] = distinct !DILocation(line: 5, column: 3, scope: !{{[0-9]+}})
22  ; CHECK: ![[INLCS2:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS2:[0-9]+]])
23  ; CHECK: ![[CS2]] = distinct !DILocation(line: 7, column: 5, scope: !{{[0-9]+}})
24  ; CHECK: ![[INLCS3:[0-9]+]] = !DILocation(line: 3, column: 41, scope: ![[F_SP]], inlinedAt: ![[CS3:[0-9]+]])
25  ; CHECK: ![[CS3]] = distinct !DILocation(line: 8, column: 3, scope: !{{[0-9]+}})
26  ;
27  ; CHECK:  bb.1.if.then:
28  ; CHECK:      DBG_VALUE $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
29  ; CHECK-NOT:  DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
30  ; CHECK:      DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS2]]
31  ; CHECK: bb.2.if.end:
32  ; CHECK:     DBG_VALUE $ebx, $noreg, ![[I_VAR]], !DIExpression(), debug-location ![[I_LOC]]
33  ; CHECK-NOT: DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location
34  ; CHECK:     DBG_VALUE $ebx, $noreg, ![[A_VAR]], !DIExpression(), debug-location ![[INLCS3]]
35  ;
36  ; ModuleID = 'livedebugvalues-limit.ll'
37  source_filename = "livedebugvalues-limit.c"
38  target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
39  target triple = "x86_64-apple-macosx"
40
41  ; Function Attrs: alwaysinline nounwind ssp uwtable
42  define void @f(i32 %a) local_unnamed_addr #0 !dbg !7 {
43  entry:
44    tail call void @llvm.dbg.value(metadata i32 %a, i64 0, metadata !12, metadata !13), !dbg !14
45    tail call void @sink(i32 %a) #4, !dbg !15
46    ret void, !dbg !16
47  }
48
49  declare void @sink(i32) local_unnamed_addr
50
51  ; Function Attrs: nounwind ssp uwtable
52  define void @foo(i32 %i) local_unnamed_addr #2 !dbg !17 {
53  entry:
54    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !19, metadata !13), !dbg !20
55    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !21
56    tail call void @sink(i32 %i) #4, !dbg !23
57    %tobool = icmp eq i32 %i, 0, !dbg !24
58    br i1 %tobool, label %if.end, label %if.then, !dbg !26
59
60  if.then:                                          ; preds = %entry
61    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !27
62    tail call void @sink(i32 %i) #4, !dbg !29
63    br label %if.end, !dbg !30
64
65  if.end:                                           ; preds = %if.then, %entry
66    tail call void @llvm.dbg.value(metadata i32 %i, i64 0, metadata !12, metadata !13) #4, !dbg !31
67    tail call void @sink(i32 %i) #4, !dbg !33
68    ret void, !dbg !34
69  }
70
71  ; Function Attrs: nounwind readnone
72  declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
73
74  ; Function Attrs: nounwind
75  declare void @llvm.stackprotector(i8*, i8**) #4
76
77  attributes #0 = { alwaysinline nounwind ssp uwtable }
78  attributes #2 = { nounwind ssp uwtable }
79  attributes #3 = { nounwind readnone }
80  attributes #4 = { nounwind }
81
82  !llvm.dbg.cu = !{!0}
83  !llvm.module.flags = !{!3, !4, !5}
84  !llvm.ident = !{!6}
85
86  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
87  !1 = !DIFile(filename: "livedebugvalues-limit.c", directory: "/Volumes/Fusion/Data/llvm")
88  !2 = !{}
89  !3 = !{i32 2, !"Dwarf Version", i32 4}
90  !4 = !{i32 2, !"Debug Info Version", i32 3}
91  !5 = !{i32 1, !"PIC Level", i32 2}
92  !6 = !{!"clang version 4.0.0 (trunk 281923) (llvm/trunk 281916)"}
93  !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
94  !8 = !DISubroutineType(types: !9)
95  !9 = !{null, !10}
96  !10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
97  !11 = !{!12}
98  !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10)
99  !13 = !DIExpression()
100  !14 = !DILocation(line: 3, column: 41, scope: !7)
101  !15 = !DILocation(line: 3, column: 46, scope: !7)
102  !16 = !DILocation(line: 3, column: 55, scope: !7)
103  !17 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !18)
104  !18 = !{!19}
105  !19 = !DILocalVariable(name: "i", arg: 1, scope: !17, file: !1, line: 4, type: !10)
106  !20 = !DILocation(line: 4, column: 14, scope: !17)
107  !21 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !22)
108  !22 = distinct !DILocation(line: 5, column: 3, scope: !17)
109  !23 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !22)
110  !24 = !DILocation(line: 6, column: 7, scope: !25)
111  !25 = distinct !DILexicalBlock(scope: !17, file: !1, line: 6, column: 7)
112  !26 = !DILocation(line: 6, column: 7, scope: !17)
113  !27 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !28)
114  !28 = distinct !DILocation(line: 7, column: 5, scope: !25)
115  !29 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !28)
116  !30 = !DILocation(line: 7, column: 5, scope: !25)
117  !31 = !DILocation(line: 3, column: 41, scope: !7, inlinedAt: !32)
118  !32 = distinct !DILocation(line: 8, column: 3, scope: !17)
119  !33 = !DILocation(line: 3, column: 46, scope: !7, inlinedAt: !32)
120  !34 = !DILocation(line: 9, column: 1, scope: !17)
121
122...
123---
124name:            f
125alignment:       16
126exposesReturnsTwice: false
127legalized:       false
128regBankSelected: false
129selected:        false
130tracksRegLiveness: true
131liveins:
132  - { reg: '$edi' }
133calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
134                        '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
135                        '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
136                        '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
137frameInfo:
138  isFrameAddressTaken: false
139  isReturnAddressTaken: false
140  hasStackMap:     false
141  hasPatchPoint:   false
142  stackSize:       8
143  offsetAdjustment: 0
144  maxAlignment:    0
145  adjustsStack:    false
146  hasCalls:        false
147  maxCallFrameSize: 0
148  hasOpaqueSPAdjustment: false
149  hasVAStart:      false
150  hasMustTailInVarArgFunc: false
151fixedStack:
152  - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16 }
153body:             |
154  bb.0.entry:
155    liveins: $edi, $rbp
156
157    frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
158    CFI_INSTRUCTION def_cfa_offset 16
159    CFI_INSTRUCTION offset $rbp, -16
160    $rbp = frame-setup MOV64rr $rsp
161    CFI_INSTRUCTION def_cfa_register $rbp
162    DBG_VALUE $edi, _, !12, !13, debug-location !14
163    $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !15
164    TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !15
165
166...
167---
168name:            foo
169alignment:       16
170exposesReturnsTwice: false
171legalized:       false
172regBankSelected: false
173selected:        false
174tracksRegLiveness: true
175liveins:
176  - { reg: '$edi' }
177calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
178                        '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
179                        '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
180                        '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
181frameInfo:
182  isFrameAddressTaken: false
183  isReturnAddressTaken: false
184  hasStackMap:     false
185  hasPatchPoint:   false
186  stackSize:       24
187  offsetAdjustment: -8
188  maxAlignment:    0
189  adjustsStack:    true
190  hasCalls:        true
191  maxCallFrameSize: 0
192  hasOpaqueSPAdjustment: false
193  hasVAStart:      false
194  hasMustTailInVarArgFunc: false
195fixedStack:
196  - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
197  - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16 }
198body:             |
199  bb.0.entry:
200    successors: %bb.2.if.end, %bb.1.if.then
201    liveins: $edi, $rbx, $rbp
202
203    frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
204    CFI_INSTRUCTION def_cfa_offset 16
205    CFI_INSTRUCTION offset $rbp, -16
206    $rbp = frame-setup MOV64rr $rsp
207    CFI_INSTRUCTION def_cfa_register $rbp
208    frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
209    frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
210    CFI_INSTRUCTION offset $rbx, -24
211    DBG_VALUE $edi, _, !19, !13, debug-location !20
212    $ebx = MOV32rr $edi
213    DBG_VALUE $ebx, _, !12, !13, debug-location !21
214    DBG_VALUE $ebx, _, !19, !13, debug-location !20
215    CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !23
216    TEST32rr $ebx, $ebx, implicit-def $eflags, debug-location !24
217    JCC_1 %bb.2.if.end, 4, implicit $eflags
218
219  bb.1.if.then:
220    successors: %bb.2.if.end
221    liveins: $ebx, $rbp
222
223    DBG_VALUE $ebx, _, !19, !13, debug-location !20
224    DBG_VALUE $ebx, _, !12, !13, debug-location !27
225    $edi = MOV32rr $ebx, debug-location !29
226    CALL64pcrel32 @sink, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, debug-location !29
227
228  bb.2.if.end:
229    liveins: $ebx, $rbp
230
231    DBG_VALUE $ebx, _, !19, !13, debug-location !20
232    $edi = MOV32rr killed $ebx, debug-location !33
233    $rsp = ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !33
234    DBG_VALUE $ebx, _, !12, !13, debug-location !31
235    $rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !33
236    $rbp = POP64r implicit-def $rsp, implicit $rsp, debug-location !33
237    TAILJMPd64 @sink, csr_64, implicit $rsp, implicit $rsp, implicit $edi, debug-location !33
238
239...
240