| blob | 83d61d71789969ae46ca9bb67832eebc18f08edf |
1 ; RUN: llc -O3 -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -print-after virtregrewriter < %s >%t 2>&1 && FileCheck <%t %s
3 ; This test checks that DBG_VALUE instruction placed correctly.
4 ; Specifically: if Register Allocator inserts additional instructions
5 ; in the beginning of basic block then it should not break placement
6 ; of DBG_VALUE for loop index variable. That DBG_VALUE instruction
7 ; for "i" variable should be placed before any real loop instruction.
8 ; https://reviews.llvm.org/D62650
10 ; Created from the following C source:
12 ; cat test_debug_val.cpp
13 ;
14 ; void func(int, ...);
15 ;
16 ; int array[0x100];
17 ;
18 ; int main( int argc, char **argv )
19 ; {
20 ; int var = 56;
21 ;
22 ; int a1 = array[1]; int a2 = array[2]; int a3 = array[3]; int a4 = array[4];
23 ; int a5 = array[5]; int a6 = array[6]; int a7 = array[7]; int a8 = array[8];
24 ; int a9 = array[9]; int a10 = array[10];
25 ;
26 ; for( int i = 0; i < 0x100; i++ ) {
27 ;
28 ; array[i] = var;
29 ;
30 ; func(0, i, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 );
31 ; }
32 ;
33 ; return 0;
34 ; }
35 ;
36 ;
37 ; clang -O3 -g -c --target=aarch64-unknown-linux -std=gnu++14 test_debug_val.cpp -emit-llvm -S -o -
40 ; CHECK: bb.2.for.body
41 ; CHECK-NEXT: predecessors
42 ; CHECK-NEXT: successors
43 ; CHECK-NEXT: liveins
44 ; CHECK-NOT: MOV
45 ; CHECK: DBG_VALUE $[[REG:[xw][0-9]+]], $noreg, !"i"
46 ; CHECK: MOV
48 ; ModuleID = 'test_debug_val.cpp'
49 source_filename = "test_debug_val.cpp"
50 target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
51 target triple = "aarch64-unknown-linux"
53 @array = dso_local local_unnamed_addr global [256 x i32] zeroinitializer, align 4, !dbg !0
55 ; Function Attrs: norecurse
56 define dso_local i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 !dbg !14 {
57 entry:
58 call void @llvm.dbg.value(metadata i32 %argc, metadata !21, metadata !DIExpression()), !dbg !36
59 call void @llvm.dbg.value(metadata i8** %argv, metadata !22, metadata !DIExpression()), !dbg !36
60 call void @llvm.dbg.value(metadata i32 56, metadata !23, metadata !DIExpression()), !dbg !36
61 %0 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 1), align 4, !dbg !37
62 call void @llvm.dbg.value(metadata i32 %0, metadata !24, metadata !DIExpression()), !dbg !36
63 %1 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 2), align 4, !dbg !42
64 call void @llvm.dbg.value(metadata i32 %1, metadata !25, metadata !DIExpression()), !dbg !36
65 %2 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 3), align 4, !dbg !43
66 call void @llvm.dbg.value(metadata i32 %2, metadata !26, metadata !DIExpression()), !dbg !36
67 %3 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 4), align 4, !dbg !44
68 call void @llvm.dbg.value(metadata i32 %3, metadata !27, metadata !DIExpression()), !dbg !36
69 %4 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 5), align 4, !dbg !45
70 call void @llvm.dbg.value(metadata i32 %4, metadata !28, metadata !DIExpression()), !dbg !36
71 %5 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 6), align 4, !dbg !46
72 call void @llvm.dbg.value(metadata i32 %5, metadata !29, metadata !DIExpression()), !dbg !36
73 %6 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 7), align 4, !dbg !47
74 call void @llvm.dbg.value(metadata i32 %6, metadata !30, metadata !DIExpression()), !dbg !36
75 %7 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 8), align 4, !dbg !48
76 call void @llvm.dbg.value(metadata i32 %7, metadata !31, metadata !DIExpression()), !dbg !36
77 %8 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 9), align 4, !dbg !49
78 call void @llvm.dbg.value(metadata i32 %8, metadata !32, metadata !DIExpression()), !dbg !36
79 %9 = load i32, i32* getelementptr inbounds ([256 x i32], [256 x i32]* @array, i64 0, i64 10), align 4, !dbg !50
80 call void @llvm.dbg.value(metadata i32 %9, metadata !33, metadata !DIExpression()), !dbg !36
81 call void @llvm.dbg.value(metadata i32 0, metadata !34, metadata !DIExpression()), !dbg !51
82 br label %for.body, !dbg !52
84 for.cond.cleanup: ; preds = %for.body
85 ret i32 0, !dbg !53
87 for.body: ; preds = %for.body, %entry
88 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
89 call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !34, metadata !DIExpression()), !dbg !51
90 %arrayidx = getelementptr inbounds [256 x i32], [256 x i32]* @array, i64 0, i64 %indvars.iv, !dbg !54
91 store i32 56, i32* %arrayidx, align 4, !dbg !57
92 %10 = trunc i64 %indvars.iv to i32, !dbg !58
93 tail call void (i32, ...) @_Z4funciz(i32 0, i32 %10, i32 %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %8, i32 %9), !dbg !58
94 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !59
95 call void @llvm.dbg.value(metadata i32 undef, metadata !34, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !51
96 %exitcond = icmp eq i64 %indvars.iv.next, 256, !dbg !60
97 br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !52, !llvm.loop !61
98 }
100 declare dso_local void @_Z4funciz(i32, ...) local_unnamed_addr #1
102 ; Function Attrs: nounwind readnone speculatable
103 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
105 attributes #0 = { nounwind uwtable }
106 attributes #1 = { nounwind uwtable }
107 attributes #2 = { nounwind readnone speculatable }
109 !llvm.dbg.cu = !{!2}
110 !llvm.module.flags = !{!10, !11, !12}
111 !llvm.ident = !{!13}
113 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
114 !1 = distinct !DIGlobalVariable(name: "array", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true)
115 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
116 !3 = !DIFile(filename: "test_debug_val.cpp", directory: "")
117 !4 = !{}
118 !5 = !{!0}
119 !6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 8192, elements: !8)
120 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
121 !8 = !{!9}
122 !9 = !DISubrange(count: 256)
123 !10 = !{i32 2, !"Dwarf Version", i32 4}
124 !11 = !{i32 2, !"Debug Info Version", i32 3}
125 !12 = !{i32 1, !"wchar_size", i32 4}
126 !13 = !{!"clang version 9.0.0 "}
127 !14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 6, type: !15, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !20)
128 !15 = !DISubroutineType(types: !16)
129 !16 = !{!7, !7, !17}
130 !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)
131 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
132 !19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char)
133 !20 = !{!21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31, !32, !33, !34}
134 !21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 6, type: !7)
135 !22 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 6, type: !17)
136 !23 = !DILocalVariable(name: "var", scope: !14, file: !3, line: 8, type: !7)
137 !24 = !DILocalVariable(name: "a1", scope: !14, file: !3, line: 10, type: !7)
138 !25 = !DILocalVariable(name: "a2", scope: !14, file: !3, line: 10, type: !7)
139 !26 = !DILocalVariable(name: "a3", scope: !14, file: !3, line: 10, type: !7)
140 !27 = !DILocalVariable(name: "a4", scope: !14, file: !3, line: 10, type: !7)
141 !28 = !DILocalVariable(name: "a5", scope: !14, file: !3, line: 11, type: !7)
142 !29 = !DILocalVariable(name: "a6", scope: !14, file: !3, line: 11, type: !7)
143 !30 = !DILocalVariable(name: "a7", scope: !14, file: !3, line: 11, type: !7)
144 !31 = !DILocalVariable(name: "a8", scope: !14, file: !3, line: 11, type: !7)
145 !32 = !DILocalVariable(name: "a9", scope: !14, file: !3, line: 12, type: !7)
146 !33 = !DILocalVariable(name: "a10", scope: !14, file: !3, line: 12, type: !7)
147 !34 = !DILocalVariable(name: "i", scope: !35, file: !3, line: 14, type: !7)
148 !35 = distinct !DILexicalBlock(scope: !14, file: !3, line: 14, column: 4)
149 !36 = !DILocation(line: 0, scope: !14)
150 !37 = !DILocation(line: 10, column: 13, scope: !14)
151 !42 = !DILocation(line: 10, column: 32, scope: !14)
152 !43 = !DILocation(line: 10, column: 51, scope: !14)
153 !44 = !DILocation(line: 10, column: 70, scope: !14)
154 !45 = !DILocation(line: 11, column: 13, scope: !14)
155 !46 = !DILocation(line: 11, column: 32, scope: !14)
156 !47 = !DILocation(line: 11, column: 51, scope: !14)
157 !48 = !DILocation(line: 11, column: 70, scope: !14)
158 !49 = !DILocation(line: 12, column: 13, scope: !14)
159 !50 = !DILocation(line: 12, column: 33, scope: !14)
160 !51 = !DILocation(line: 0, scope: !35)
161 !52 = !DILocation(line: 14, column: 4, scope: !35)
162 !53 = !DILocation(line: 21, column: 4, scope: !14)
163 !54 = !DILocation(line: 16, column: 8, scope: !55)
164 !55 = distinct !DILexicalBlock(scope: !56, file: !3, line: 14, column: 37)
165 !56 = distinct !DILexicalBlock(scope: !35, file: !3, line: 14, column: 4)
166 !57 = !DILocation(line: 16, column: 17, scope: !55)
167 !58 = !DILocation(line: 18, column: 8, scope: !55)
168 !59 = !DILocation(line: 14, column: 32, scope: !56)
169 !60 = !DILocation(line: 14, column: 22, scope: !56)
170 !61 = distinct !{!61, !52, !62}
171 !62 = !DILocation(line: 19, column: 4, scope: !35)