xref: /llvm-project/llvm/test/DebugInfo/MIR/X86/dvl-livedebugvalues-join.mir (revision d53425e2a33a0ff7336c86d3f668b1855c47a6de)
1# RUN: llc -mtriple=x86_64-- -run-pass livedebugvalues -o - %s -experimental-debug-variable-locations=false | FileCheck %s --implicit-check-not=DBG_VALUE_LIST
2#
3# Test a series of joins, where:
4#  * The locations agree, although registers have changed,
5#  * A register down one of the predecessors has been def'd,
6#  * The register operands to DBG_VALUE_LIST have been swapped,
7#  * A spurious additional operand has been added to one path,
8#  * The expressions are not the same (plus -> minus).
9#
10# Each join block below checks for one DBG_VALUE_LIST: either we re-state the var
11# location in a block for the next test, or it's created as a live-in and we
12# use that for the next test. Two DBG_VALUE_LISTs in a block would represent
13# a live-in that we didn't expect, and a test failure.
14#
15# Each conditional block should have at least one, possibly two.
16#
17# CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c"
18#
19# CHECK-LABEL: bb.0.entry:
20# CHECK:       DBG_VALUE_LIST ![[VAR]],
21# CHECK-LABEL: bb.1:
22# CHECK:       DBG_VALUE_LIST ![[VAR]],
23# CHECK:       DBG_VALUE_LIST ![[VAR]],
24# CHECK-LABEL: bb.2:
25# CHECK:       DBG_VALUE_LIST ![[VAR]], !DIExpression(DW_OP_LLVM_arg, 0,
26# CHECK-SAME:                        DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi
27# CHECK-LABEL: bb.3:
28# CHECK:       DBG_VALUE_LIST ![[VAR]],
29# CHECK-LABEL: bb.4:
30# CHECK:       DBG_VALUE_LIST ![[VAR]],
31# CHECK-SAME:        $rdi, $rsi
32# CHECK-LABEL: bb.5:
33# CHECK:       DBG_VALUE_LIST ![[VAR]],
34# CHECK:       DBG_VALUE_LIST ![[VAR]],
35# CHECK-SAME:        $rsi, $rdi
36# CHECK-LABEL: bb.6:
37# CHECK:       DBG_VALUE_LIST ![[VAR]],
38# CHECK-LABEL: bb.7:
39# CHECK:       DBG_VALUE_LIST ![[VAR]],
40# CHECK:       DBG_VALUE_LIST ![[VAR]],
41# CHECK-SAME:        $rdi, $rsi, $rax
42# CHECK-LABEL: bb.8:
43# CHECK:       DBG_VALUE_LIST ![[VAR]],
44# CHECK-LABEL: bb.9:
45# CHECK:       DBG_VALUE_LIST ![[VAR]],
46# CHECK:       DBG_VALUE_LIST ![[VAR]],
47# CHECK-SAME:        DW_OP_minus
48# CHECK-LABEL: bb.10:
49--- |
50  ; ModuleID = 'test.cpp'
51  source_filename = "test.cpp"
52  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
53  target triple = "x86_64-unknown-linux-gnu"
54
55  ; Function Attrs: norecurse nounwind readnone uwtable
56  define dso_local i32 @_Z3fooii(i32 %a, i32 %b) local_unnamed_addr !dbg !7 {
57  entry:
58    ret i32 0, !dbg !17
59  }
60
61  ; Function Attrs: nounwind readnone speculatable willreturn
62  declare void @llvm.dbg.value(metadata, metadata, metadata)
63
64  !llvm.dbg.cu = !{!0}
65  !llvm.module.flags = !{!3, !4, !5}
66  !llvm.ident = !{!6}
67
68  !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
69  !1 = !DIFile(filename: "test.cpp", directory: "/")
70  !2 = !{}
71  !3 = !{i32 7, !"Dwarf Version", i32 4}
72  !4 = !{i32 2, !"Debug Info Version", i32 3}
73  !5 = !{i32 1, !"wchar_size", i32 4}
74  !6 = !{!"clang version 11.0.0"}
75  !7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooii", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
76  !8 = !DISubroutineType(types: !9)
77  !9 = !{!10, !10, !10}
78  !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
79  !11 = !{!12, !13, !14}
80  !12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 2, type: !10)
81  !13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 2, type: !10)
82  !14 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 3, type: !10)
83  !15 = !DILocation(line: 0, scope: !7)
84  !16 = !DILocation(line: 4, column: 12, scope: !7)
85  !17 = !DILocation(line: 4, column: 3, scope: !7)
86
87...
88---
89name:            _Z3fooii
90body:             |
91  bb.0.entry:
92    liveins: $rdi, $rsi
93
94    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
95    CMP64ri8 $rdi, 0, implicit-def $eflags
96    JCC_1 %bb.2, 4, implicit $eflags
97
98  bb.1:
99    liveins: $rdi, $rsi
100    $rdi = MOV64ri 0
101    $rsi = MOV64ri 0
102    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
103
104  bb.2:
105    liveins: $rdi, $rsi
106    ; Should be a live-in loc here,
107    CMP64ri8 $rdi, 0, implicit-def $eflags
108    JCC_1 %bb.4, 4, implicit $eflags
109
110  bb.3:
111    liveins: $rdi, $rsi
112    $rsi = MOV64ri 0
113
114  bb.4:
115    liveins: $rdi, $rsi
116    ; Should _not_ be a live-in loc here.
117    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
118    CMP64ri8 $rdi, 0, implicit-def $eflags
119    JCC_1 %bb.6, 4, implicit $eflags
120
121  bb.5:
122    liveins: $rdi, $rsi
123    ; Flip some args,
124    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rsi, $rdi, debug-location !15
125
126  bb.6:
127    liveins: $rdi, $rsi
128    ; Should _not_ be a live-in loc here.
129    $rax = MOV64ri 0
130    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
131    CMP64ri8 $rdi, 0, implicit-def $eflags
132    JCC_1 %bb.8, 4, implicit $eflags
133
134  bb.7:
135    liveins: $rdi, $rsi
136    ; Add an extra, spurious, unused argument
137    $rax = MOV64ri 1
138    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, $rax, debug-location !15
139
140  bb.8:
141    liveins: $rdi, $rsi
142    ; Should _not_ be a live-in loc here.
143    $rax = MOV64ri 0
144    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rdi, $rsi, debug-location !15
145    CMP64ri8 $rdi, 0, implicit-def $eflags
146    JCC_1 %bb.10, 4, implicit $eflags
147
148  bb.9:
149    liveins: $rdi, $rsi
150    ; Replace add with sub in the expr
151    $rax = MOV64ri 1
152    DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_minus), $rdi, $rsi, debug-location !15
153
154  bb.10:
155    liveins: $rdi, $rsi
156    ; Should _not_ be a live-in loc here.
157    RET64
158
159...
160
161