1 # RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
2 # RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues \
3 # RUN: | FileCheck %s --check-prefix=CHECK
5 # Copy of dbg-phis-merging-in-ldv.mir, where I've added a loop in between the
6 # DBG_PHI "definitions" of values, and the DBG_INSTR_REFs where they're used.
7 # We should be able to traverse this obstacle.
9 ; ModuleID = 'before.mir'
10 source_filename = "test.c"
11 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-unknown-linux-gnu"
14 define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
16 call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13
17 call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13
18 call void @ext(i64 %bar), !dbg !15
19 %add = add nsw i64 %bar, 12, !dbg !16
20 call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13
21 call void @ext(i64 %add), !dbg !17
22 %add1 = add nsw i64 %baz, 1, !dbg !18
23 call void @llvm.dbg.value(metadata i64 %add1, metadata !14, metadata !DIExpression()), !dbg !13
24 %call = call i64 @getlong(), !dbg !19
25 %tobool = icmp ne i64 %call, 0, !dbg !19
26 br i1 %tobool, label %if.then, label %if.else, !dbg !21
28 if.then: ; preds = %entry
29 %add2 = add nsw i64 %add, 1, !dbg !22
30 call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13
31 br label %if.end, !dbg !24
33 if.else: ; preds = %entry
34 %add3 = add nsw i64 %add, 2, !dbg !25
35 call void @llvm.dbg.value(metadata i64 %add3, metadata !12, metadata !DIExpression()), !dbg !13
38 if.end: ; preds = %if.else, %if.then
39 %bar.addr.0 = phi i64 [ %add2, %if.then ], [ %add3, %if.else ], !dbg !27
40 call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13
41 %add4 = add nsw i64 %bar.addr.0, %add1, !dbg !28
42 call void @llvm.dbg.value(metadata i64 %add4, metadata !12, metadata !DIExpression()), !dbg !13
43 call void @ext(i64 %add4), !dbg !29
44 %conv = trunc i64 %add4 to i32, !dbg !30
45 ret i32 %conv, !dbg !31
48 ; Function Attrs: nounwind readnone speculatable willreturn
49 declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
51 declare dso_local void @ext(i64)
53 declare dso_local i64 @getlong()
55 ; Function Attrs: nounwind readnone speculatable willreturn
56 declare void @llvm.dbg.value(metadata, metadata, metadata) #0
58 attributes #0 = { nounwind readnone speculatable willreturn }
61 !llvm.module.flags = !{!3, !4, !5}
64 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
65 !1 = !DIFile(filename: "test.c", directory: ".")
67 !3 = !{i32 7, !"Dwarf Version", i32 4}
68 !4 = !{i32 2, !"Debug Info Version", i32 3}
69 !5 = !{i32 1, !"wchar_size", i32 4}
71 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
72 !8 = !DISubroutineType(types: !9)
74 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
75 !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
76 !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
77 !13 = !DILocation(line: 0, scope: !7)
78 !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
79 !15 = !DILocation(line: 4, column: 3, scope: !7)
80 !16 = !DILocation(line: 5, column: 7, scope: !7)
81 !17 = !DILocation(line: 6, column: 3, scope: !7)
82 !18 = !DILocation(line: 7, column: 7, scope: !7)
83 !19 = !DILocation(line: 9, column: 7, scope: !20)
84 !20 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 7)
85 !21 = !DILocation(line: 9, column: 7, scope: !7)
86 !22 = !DILocation(line: 10, column: 9, scope: !23)
87 !23 = distinct !DILexicalBlock(scope: !20, file: !1, line: 9, column: 18)
88 !24 = !DILocation(line: 11, column: 3, scope: !23)
89 !25 = !DILocation(line: 12, column: 9, scope: !26)
90 !26 = distinct !DILexicalBlock(scope: !20, file: !1, line: 11, column: 10)
91 !27 = !DILocation(line: 0, scope: !20)
92 !28 = !DILocation(line: 15, column: 7, scope: !7)
93 !29 = !DILocation(line: 16, column: 3, scope: !7)
94 !30 = !DILocation(line: 17, column: 10, scope: !7)
95 !31 = !DILocation(line: 17, column: 3, scope: !7)
101 tracksRegLiveness: true
107 offsetAdjustment: -24
112 cvBytesOfCalleeSavedRegisters: 16
114 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
115 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$r14' }
116 machineFunctionInfo: {}
119 successors: %bb.2, %bb.1
120 liveins: $rdi, $rsi, $r14, $rbx
122 frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
123 CFI_INSTRUCTION def_cfa_offset 16
124 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
125 CFI_INSTRUCTION def_cfa_offset 24
126 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
127 CFI_INSTRUCTION def_cfa_offset 32
128 CFI_INSTRUCTION offset $rbx, -24
129 CFI_INSTRUCTION offset $r14, -16
132 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !15
133 renamable $rbx = ADD64ri32 killed renamable $rbx, 12, implicit-def $eflags, debug-location !16
134 $rdi = MOV64rr $rbx, debug-location !17
135 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !17
136 renamable $r14 = ADD64ri32 killed renamable $r14, 1, implicit-def $eflags, debug-location !18
137 CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !19
138 CMP64ri8 killed renamable $rax, 0, implicit-def $eflags, debug-location !19
139 JCC_1 %bb.1, 5, implicit $eflags, debug-location !21
142 liveins: $rbx, $r14, $rax
144 renamable $rbx = ADD64ri32 killed renamable $rbx, 2, implicit-def $eflags, debug-location !25
152 liveins: $rbx, $r14, $rax
154 renamable $rbx = ADD64ri32 killed renamable $rbx, 1, implicit-def $eflags, debug-location !22
161 CMP64ri8 $r15, 0, implicit-def $eflags, debug-location !19
162 JCC_1 %bb.3, 5, implicit $eflags, debug-location !21
167 DBG_INSTR_REF 1, 0, !14, !DIExpression(), debug-location !13
168 DBG_INSTR_REF 2, 0, !12, !DIExpression(), debug-location !13
169 DBG_INSTR_REF 3, 0, !12, !DIExpression(), debug-location !13
171 ; Value number 1 is live-through the above control flow from the two
173 ; CHECK: DBG_INSTR_REF 1, 0
174 ; CHECK-NEXT: DBG_VALUE $r14
176 ; While value number 2 has different defs that merge on entry to bb.3.
177 ; These are both in $rbx though, and we should find its location:
178 ; CHECK: DBG_INSTR_REF 2, 0
179 ; CHECK-NEXT: DBG_VALUE $rbx
181 ; Value number 3 cannot be resolved because $rax is clobbered in bb.2,
182 ; meaning the merged value in bb.3 is incorrect. It should produce a
184 ; CHECK: DBG_INSTR_REF 3, 0
185 ; CHECK-NEXT: DBG_VALUE $noreg
187 renamable $rbx = ADD64rr killed renamable $rbx, killed renamable $r14, implicit-def $eflags, debug-location !28
188 DBG_INSTR_REF 2, 0, !12, !DIExpression(), debug-location !13
190 ; After clobbering rbx, the variable location should not be available.
191 ; CHECK: DBG_INSTR_REF 2, 0
192 ; CHECK-NEXT: DBG_VALUE $noreg
194 $rdi = MOV64rr $rbx, debug-location !29
195 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !29
196 $eax = MOV32rr $ebx, implicit killed $rbx, debug-location !31
197 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !31
198 CFI_INSTRUCTION def_cfa_offset 24, debug-location !31
199 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !31
200 CFI_INSTRUCTION def_cfa_offset 16, debug-location !31
201 $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !31
202 CFI_INSTRUCTION def_cfa_offset 8, debug-location !31
203 RETQ implicit $eax, debug-location !31