1 # RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \
2 # RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues\
5 # Test that a DBG_INSTR_REF that refers to a DBG_PHI, will be translated into a
6 # DBG_VALUE of the value read at that DBG_PHI. Same original code as
10 ; ModuleID = 'phi-coalescing.mir'
11 source_filename = "test.c"
12 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
13 target triple = "x86_64-unknown-linux-gnu"
15 define dso_local i32 @foo(i64 %bar, i64 %baz) !dbg !7 {
17 call void @llvm.dbg.value(metadata i64 %bar, metadata !12, metadata !DIExpression()), !dbg !13
18 call void @llvm.dbg.value(metadata i64 %baz, metadata !14, metadata !DIExpression()), !dbg !13
19 call void @ext(i64 %bar), !dbg !15
20 %add = add nsw i64 %bar, 12, !dbg !16
21 call void @llvm.dbg.value(metadata i64 %add, metadata !12, metadata !DIExpression()), !dbg !13
22 call void @ext(i64 %add), !dbg !17
23 %call = call i64 @getlong(), !dbg !18
24 %tobool = icmp ne i64 %call, 0, !dbg !18
25 br i1 %tobool, label %if.then, label %if.end, !dbg !20
27 if.then: ; preds = %entry
28 %add1 = add nsw i64 %add, 1, !dbg !21
29 call void @llvm.dbg.value(metadata i64 %add1, metadata !12, metadata !DIExpression()), !dbg !13
30 br label %if.end, !dbg !22
32 if.end: ; preds = %if.then, %entry
33 %bar.addr.0 = phi i64 [ %add1, %if.then ], [ %add, %entry ], !dbg !13
34 call void @llvm.dbg.value(metadata i64 %bar.addr.0, metadata !12, metadata !DIExpression()), !dbg !13
35 %add2 = add nsw i64 %bar.addr.0, %baz, !dbg !23
36 call void @llvm.dbg.value(metadata i64 %add2, metadata !12, metadata !DIExpression()), !dbg !13
37 call void @ext(i64 %add2), !dbg !24
38 %conv = trunc i64 %add2 to i32, !dbg !25
39 ret i32 %conv, !dbg !26
42 ; Function Attrs: nounwind readnone speculatable willreturn
43 declare void @llvm.dbg.declare(metadata, metadata, metadata)
45 declare dso_local void @ext(i64)
47 declare dso_local i64 @getlong()
49 ; Function Attrs: nounwind readnone speculatable willreturn
50 declare void @llvm.dbg.value(metadata, metadata, metadata)
53 !llvm.module.flags = !{!3, !4, !5}
56 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
57 !1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
59 !3 = !{i32 7, !"Dwarf Version", i32 4}
60 !4 = !{i32 2, !"Debug Info Version", i32 3}
61 !5 = !{i32 1, !"wchar_size", i32 4}
63 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
64 !8 = !DISubroutineType(types: !9)
66 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
67 !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
68 !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
69 !13 = !DILocation(line: 0, scope: !7)
70 !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
71 !15 = !DILocation(line: 4, column: 3, scope: !7)
72 !16 = !DILocation(line: 5, column: 7, scope: !7)
73 !17 = !DILocation(line: 6, column: 3, scope: !7)
74 !18 = !DILocation(line: 8, column: 7, scope: !19)
75 !19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
76 !20 = !DILocation(line: 8, column: 7, scope: !7)
77 !21 = !DILocation(line: 9, column: 9, scope: !19)
78 !22 = !DILocation(line: 9, column: 5, scope: !19)
79 !23 = !DILocation(line: 11, column: 7, scope: !7)
80 !24 = !DILocation(line: 12, column: 3, scope: !7)
81 !25 = !DILocation(line: 13, column: 10, scope: !7)
82 !26 = !DILocation(line: 13, column: 3, scope: !7)
88 tracksRegLiveness: true
99 cvBytesOfCalleeSavedRegisters: 16
101 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
102 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$r14' }
103 machineFunctionInfo: {}
106 liveins: $rdi, $rsi, $r14, $rbx
108 frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
109 CFI_INSTRUCTION def_cfa_offset 16
110 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
111 CFI_INSTRUCTION def_cfa_offset 24
112 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
113 CFI_INSTRUCTION def_cfa_offset 32
114 CFI_INSTRUCTION offset $rbx, -24
115 CFI_INSTRUCTION offset $r14, -16
118 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !15
119 renamable $rbx = ADD64ri32 killed renamable $rbx, 12, implicit-def $eflags, debug-location !16
120 $rdi = MOV64rr $rbx, debug-location !17
121 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !17
122 CALL64pcrel32 @getlong, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax, debug-location !18
123 CMP64ri8 killed renamable $rax, 0, implicit-def $eflags, debug-location !18
124 JCC_1 %bb.2, 4, implicit $eflags, debug-location !20
129 renamable $rbx = ADD64ri32 killed renamable $rbx, 1, implicit-def $eflags, debug-location !21
137 DBG_INSTR_REF 1, 0, !12, !DIExpression(), debug-location !13
139 ; This sequence should mark the contents of rbx on block entry as being the
140 ; value for the variable at this DBG_INSTR_REF. We've force it to be in
141 ; $rax now, so we should see a DBG_VALUE for rax:
142 ; CHECK: DBG_PHI $rbx, 1
143 ; CHECK-NEXT: $rax = COPY $rbx
144 ; CHECK-NEXT: $rbx = MOV64ri 0
145 ; CHECK-NEXT: DBG_INSTR_REF 1, 0
146 ; CHECK-NEXT: DBG_VALUE $rax, $noreg
149 renamable $rbx = ADD64rr killed renamable $rbx, killed renamable $r14, implicit-def $eflags, debug-location !23
150 DBG_VALUE $rbx, $noreg, !12, !DIExpression(), debug-location !13
151 $rdi = MOV64rr $rbx, debug-location !24
152 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, debug-location !24
153 $eax = MOV32rr $ebx, implicit killed $rbx, debug-location !26
154 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !26
155 CFI_INSTRUCTION def_cfa_offset 24, debug-location !26
156 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26
157 CFI_INSTRUCTION def_cfa_offset 16, debug-location !26
158 $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !26
159 CFI_INSTRUCTION def_cfa_offset 8, debug-location !26
160 RET64 implicit $eax, debug-location !26