2 ; RUN: llc %s -march=x86-64 -run-pass=livedebugvalues -o - -experimental-debug-variable-locations -emulate-old-livedebugvalues=0 | FileCheck %s -implicit-check-not=DBG_VALUE
4 ; Sometimes, variables can have multiple locations, and when control flow
5 ; merges LiveDebugValues has a hard time picking which one the variable lives
6 ; in. Test two of these scenarios that old LiveDebugValues can't handle: when
7 ; a value is in two registers, and when a value is both in a register and
12 ; CHECK-LABEL: bb.0.entry:
13 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
14 ; CHECK-LABEL: bb.1.bb1:
15 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
16 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
17 ; CHECK-LABEL: bb.2.bb2:
18 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
19 ; CHECK-LABEL: bb.3.bb3:
20 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
22 ; On the stack: we move from $rbp to a stack slot in bb4, but join back on
26 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
27 ; CHECK: DBG_VALUE $rsp, 0, !16, !DIExpression()
29 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
31 ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
33 declare i64 @bees(i64 %arg);
35 define i32 @_Z8bb_to_bb(i64 %arg) local_unnamed_addr !dbg !12 {
37 br label %bb1, !dbg !17
39 br label %bb2, !dbg !17
41 br label %bb3, !dbg !17
47 !llvm.module.flags = !{!7, !8, !9, !10}
49 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, debugInfoForProfiling: true, nameTableKind: None)
50 !1 = !DIFile(filename: "main.cpp", directory: "F:\")
53 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
54 !5 = distinct !DIGlobalVariable(name: "start", scope: !0, file: !1, line: 4, type: !6, isLocal: false, isDefinition: true)
55 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
56 !7 = !{i32 2, !"Dwarf Version", i32 4}
57 !8 = !{i32 2, !"Debug Info Version", i32 3}
58 !9 = !{i32 1, !"wchar_size", i32 2}
59 !10 = !{i32 7, !"PIC Level", i32 2}
60 !11 = !{!"clang version 10.0.0"}
61 !12 = distinct !DISubprogram(name: "bb_to_bb", linkageName: "bb_to_bb", scope: !1, file: !1, line: 6, type: !13, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
62 !13 = !DISubroutineType(types: !14)
65 !16 = !DILocalVariable(name: "myVar", scope: !12, file: !1, line: 7, type: !6)
66 !17 = !DILocation(line: 10, scope: !12)
71 tracksRegLiveness: true
73 - { reg: '$rdi', virtual-reg: '' }
75 - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
76 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
77 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
81 successors: %bb.1, %bb.2
82 $rbp = MOV64rr $rdi, debug-location !17
83 DBG_VALUE $rbp, $noreg, !16, !DIExpression(), debug-location !17
84 dead $rcx = MOV64ri 0, debug-location !17
85 CALL64pcrel32 @bees, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $rax, debug-location !17
86 CMP64ri8 renamable $rax, 1, implicit-def $eflags, debug-location !17
87 JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !17
91 $rbp = MOV64ri 0, debug-location !17
92 DBG_VALUE $rbp, $noreg, !16, !DIExpression(), debug-location !17
97 $rax = MOV64ri 0, debug-location !17
100 $rdi = MOV64rr $rbp, debug-location !17
101 CALL64pcrel32 @bees, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $rax, debug-location !17
102 CMP64ri8 renamable $rax, 1, implicit-def $eflags, debug-location !17
103 JCC_1 %bb.5, 4, implicit killed $eflags, debug-location !17
106 MOV64mr $rsp, 1, $noreg, 8, $noreg, killed renamable $rbp :: (store (s64) into %stack.0)
112 RETQ $rax, debug-location !17