1 ; RUN: llc -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
3 ; PR22296: In this testcase the DBG_VALUE describing "p5" becomes unavailable
4 ; because the register its address is in is clobbered and we (currently) aren't
5 ; smart enough to realize that the value is rematerialized immediately after the
6 ; DBG_VALUE and/or is actually a stack slot.
8 ; Test that we handle this situation gracefully by omitting the DW_AT_location
10 ; Note that this check may XPASS in the future if DbgValueHistoryCalculator
11 ; becoms smarter. That would be fine, too.
13 ; CHECK: DW_TAG_subprogram
14 ; CHECK: linkage_name{{.*}}_Z2f21A
15 ; CHECK: DW_TAG_formal_parameter
16 ; CHECK-NOT: DW_AT_location
17 ; CHECK-NEXT: DW_AT_name {{.*}}"p5"
25 ; void f1(int *p1, int p2);
26 ; void __attribute__((always_inline)) f2(A p5) { f1(p5.m1, p5.m2); }
29 ; void func(const int &, const int&);
49 ; ModuleID = 'test.cpp'
50 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
51 target triple = "x86_64-apple-macosx10.10.0"
53 %struct.A = type { i32*, i32 }
55 ; Function Attrs: alwaysinline ssp uwtable
56 define void @_Z2f21A(i32* %p5.coerce0, i32 %p5.coerce1) #0 {
58 tail call void @llvm.dbg.value(metadata i32* %p5.coerce0, i64 0, metadata !16, metadata !33), !dbg !34
59 tail call void @llvm.dbg.value(metadata i32 %p5.coerce1, i64 0, metadata !16, metadata !35), !dbg !34
60 tail call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !16, metadata !36), !dbg !34
61 tail call void @_Z2f1Pii(i32* %p5.coerce0, i32 %p5.coerce1), !dbg !37
65 ; Function Attrs: nounwind readnone
66 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
68 declare void @_Z2f1Pii(i32*, i32) #2
70 ; Function Attrs: ssp uwtable
71 define void @_Z1fv() #3 {
73 %x = alloca i32, align 4
74 %ref.tmp = alloca i32, align 4
75 %y = alloca i8, align 1
76 %j = alloca i8, align 1
77 %I = alloca i8, align 1
78 %ref.tmp5 = alloca i32, align 4
79 %ref.tmp6 = alloca i32, align 4
80 %call11 = call i32 @_Z4condv(), !dbg !39
81 %tobool12 = icmp eq i32 %call11, 0, !dbg !39
82 br i1 %tobool12, label %while.end7, label %while.body, !dbg !40
84 while.cond.loopexit: ; preds = %while.body4, %while.body
85 %call = call i32 @_Z4condv(), !dbg !39
86 %tobool = icmp eq i32 %call, 0, !dbg !39
87 br i1 %tobool, label %while.end7, label %while.body, !dbg !40
89 while.body: ; preds = %entry, %while.cond.loopexit
90 store i32 0, i32* %ref.tmp, align 4, !dbg !41, !tbaa !42
91 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !21, metadata !36), !dbg !46
92 call void @_Z4funcRKiS0_(i32* dereferenceable(4) %x, i32* dereferenceable(4) %ref.tmp), !dbg !47
93 %call29 = call i32 @_Z4condv(), !dbg !48
94 %tobool310 = icmp eq i32 %call29, 0, !dbg !48
95 br i1 %tobool310, label %while.cond.loopexit, label %while.body4, !dbg !49
97 while.body4: ; preds = %while.body, %while.body4
98 call void @llvm.dbg.value(metadata i8* %y, i64 0, metadata !23, metadata !36), !dbg !50
99 call void @_Z4funcPv(i8* %y), !dbg !51
100 call void @llvm.dbg.value(metadata i8* %j, i64 0, metadata !26, metadata !36), !dbg !52
101 call void @_Z4funcPv(i8* %j), !dbg !53
102 call void @llvm.dbg.value(metadata i8* %I, i64 0, metadata !27, metadata !36), !dbg !54
103 call void @_Z4funcPv(i8* %I), !dbg !55
104 store i32 0, i32* %ref.tmp5, align 4, !dbg !56, !tbaa !42
105 store i32 0, i32* %ref.tmp6, align 4, !dbg !57, !tbaa !42
106 call void @_Z4funcRKiS0_(i32* dereferenceable(4) %ref.tmp5, i32* dereferenceable(4) %ref.tmp6), !dbg !58
107 call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !28, metadata !36), !dbg !59
108 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !28, metadata !33), !dbg !59
109 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !21, metadata !36), !dbg !46
110 call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !60, metadata !33), !dbg !62
111 call void @llvm.dbg.value(metadata i32 undef, i64 0, metadata !60, metadata !35), !dbg !62
112 call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !60, metadata !36), !dbg !62
113 call void @_Z2f1Pii(i32* %x, i32 undef), !dbg !63
114 %call2 = call i32 @_Z4condv(), !dbg !48
115 %tobool3 = icmp eq i32 %call2, 0, !dbg !48
116 br i1 %tobool3, label %while.cond.loopexit, label %while.body4, !dbg !49
118 while.end7: ; preds = %while.cond.loopexit, %entry
122 declare i32 @_Z4condv()
124 declare void @_Z4funcRKiS0_(i32* dereferenceable(4), i32* dereferenceable(4))
126 declare void @_Z4funcPv(i8*)
128 ; Function Attrs: nounwind readnone
129 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
131 attributes #0 = { alwaysinline ssp uwtable }
132 attributes #1 = { nounwind readnone }
133 attributes #3 = { ssp uwtable }
136 !llvm.module.flags = !{!29, !30, !31}
139 !0 = !{!"0x11\004\00clang version 3.7.0 (trunk 227088) (llvm/trunk 227091)\001\00\000\00\001", !1, !2, !3, !10, !2, !2} ; [ DW_TAG_compile_unit ] [/test.cpp] [DW_LANG_C_plus_plus]
140 !1 = !{!"test.cpp", !""}
143 !4 = !{!"0x13\00A\001\00128\0064\000\000\000", !1, null, null, !5, null, null, !"_ZTS1A"} ; [ DW_TAG_structure_type ] [A] [line 1, size 128, align 64, offset 0] [def] [from ]
145 !6 = !{!"0xd\00m1\002\0064\0064\000\000", !1, !"_ZTS1A", !7} ; [ DW_TAG_member ] [m1] [line 2, size 64, align 64, offset 0] [from ]
146 !7 = !{!"0xf\00\000\0064\0064\000\000", null, null, !8} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from int]
147 !8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
148 !9 = !{!"0xd\00m2\003\0032\0032\0064\000", !1, !"_ZTS1A", !8} ; [ DW_TAG_member ] [m2] [line 3, size 32, align 32, offset 64] [from int]
150 !11 = !{!"0x2e\00f2\00f2\00_Z2f21A\007\000\001\000\000\00256\001\007", !1, !12, !13, null, void (i32*, i32)* @_Z2f21A, null, null, !15} ; [ DW_TAG_subprogram ] [line 7] [def] [f2]
151 !12 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/test.cpp]
152 !13 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !14, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
153 !14 = !{null, !"_ZTS1A"}
155 !16 = !{!"0x101\00p5\0016777223\000", !11, !12, !"_ZTS1A"} ; [ DW_TAG_arg_variable ] [p5] [line 7]
156 !17 = !{!"0x2e\00f\00f\00_Z1fv\0012\000\001\000\000\00256\001\0012", !1, !12, !18, null, void ()* @_Z1fv, null, null, !20} ; [ DW_TAG_subprogram ] [line 12] [def] [f]
157 !18 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !19, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
159 !20 = !{!21, !23, !26, !27, !28}
160 !21 = !{!"0x100\00x\0014\000", !22, !12, !8} ; [ DW_TAG_auto_variable ] [x] [line 14]
161 !22 = !{!"0xb\0013\0018\000", !1, !17} ; [ DW_TAG_lexical_block ] [/test.cpp]
162 !23 = !{!"0x100\00y\0017\000", !24, !12, !25} ; [ DW_TAG_auto_variable ] [y] [line 17]
163 !24 = !{!"0xb\0016\0020\001", !1, !22} ; [ DW_TAG_lexical_block ] [/test.cpp]
164 !25 = !{!"0x24\00char\000\008\008\000\000\006", null, null} ; [ DW_TAG_base_type ] [char] [line 0, size 8, align 8, offset 0, enc DW_ATE_signed_char]
165 !26 = !{!"0x100\00j\0019\000", !24, !12, !25} ; [ DW_TAG_auto_variable ] [j] [line 19]
166 !27 = !{!"0x100\00I\0021\000", !24, !12, !25} ; [ DW_TAG_auto_variable ] [I] [line 21]
167 !28 = !{!"0x100\00g\0024\000", !24, !12, !"_ZTS1A"} ; [ DW_TAG_auto_variable ] [g] [line 24]
168 !29 = !{i32 2, !"Dwarf Version", i32 2}
169 !30 = !{i32 2, !"Debug Info Version", i32 2}
170 !31 = !{i32 1, !"PIC Level", i32 2}
171 !32 = !{!"clang version 3.7.0 (trunk 227088) (llvm/trunk 227091)"}
172 !33 = !{!"0x102\00147\000\008"} ; [ DW_TAG_expression ] [DW_OP_piece offset=0, size=8]
173 !34 = !MDLocation(line: 7, column: 42, scope: !11)
174 !35 = !{!"0x102\00147\008\004"} ; [ DW_TAG_expression ] [DW_OP_piece offset=8, size=4]
175 !36 = !{!"0x102"} ; [ DW_TAG_expression ]
176 !37 = !MDLocation(line: 7, column: 48, scope: !11)
177 !38 = !MDLocation(line: 7, column: 66, scope: !11)
178 !39 = !MDLocation(line: 13, column: 10, scope: !17)
179 !40 = !MDLocation(line: 13, column: 3, scope: !17)
180 !41 = !MDLocation(line: 15, column: 13, scope: !22)
181 !42 = !{!43, !43, i64 0}
182 !43 = !{!"int", !44, i64 0}
183 !44 = !{!"omnipotent char", !45, i64 0}
184 !45 = !{!"Simple C/C++ TBAA"}
185 !46 = !MDLocation(line: 14, column: 9, scope: !22)
186 !47 = !MDLocation(line: 15, column: 5, scope: !22)
187 !48 = !MDLocation(line: 16, column: 12, scope: !22)
188 !49 = !MDLocation(line: 16, column: 5, scope: !22)
189 !50 = !MDLocation(line: 17, column: 12, scope: !24)
190 !51 = !MDLocation(line: 18, column: 7, scope: !24)
191 !52 = !MDLocation(line: 19, column: 12, scope: !24)
192 !53 = !MDLocation(line: 20, column: 7, scope: !24)
193 !54 = !MDLocation(line: 21, column: 12, scope: !24)
194 !55 = !MDLocation(line: 22, column: 7, scope: !24)
195 !56 = !MDLocation(line: 23, column: 12, scope: !24)
196 !57 = !MDLocation(line: 23, column: 15, scope: !24)
197 !58 = !MDLocation(line: 23, column: 7, scope: !24)
198 !59 = !MDLocation(line: 24, column: 9, scope: !24)
199 !60 = !{!"0x101\00p5\0016777223\000", !11, !12, !"_ZTS1A", !61} ; [ DW_TAG_arg_variable ] [p5] [line 7]
200 !61 = distinct !MDLocation(line: 26, column: 7, scope: !24)
201 !62 = !MDLocation(line: 7, column: 42, scope: !11, inlinedAt: !61)
202 !63 = !MDLocation(line: 7, column: 48, scope: !11, inlinedAt: !61)
203 !64 = !MDLocation(line: 29, column: 1, scope: !17)