1 # RUN: llc -O1 -start-before=greedy -stop-after=virtregrewriter -o /dev/null %s -debug-only=livedebugvars 2>&1 | FileCheck -check-prefix=CHECKDBG %s
5 # This test case was generated by using the following c program:
6 # extern void foo(int, int);
10 # int main(int argc, char** argv)
18 # It was compiled with -g and -O1, and the mir was dumped before ra greedy.
21 ; ModuleID = 'live-debug-vars-unused-arg.ll'
22 source_filename = "live-debug-vars-unused-arg.c"
23 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
24 target triple = "x86_64-unknown-linux-gnu"
26 @bar = local_unnamed_addr global [2 x i32] [i32 1, i32 2], align 4, !dbg !0
28 ; Function Attrs: nounwind uwtable
29 define i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 !dbg !14 {
31 tail call void @llvm.dbg.value(metadata i32 %argc, metadata !21, metadata !DIExpression()), !dbg !25
32 tail call void @llvm.dbg.value(metadata i8** %argv, metadata !22, metadata !DIExpression()), !dbg !26
33 %0 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 0), align 4, !dbg !27, !tbaa !28
34 tail call void @llvm.dbg.value(metadata i32 %0, metadata !23, metadata !DIExpression()), !dbg !32
35 %1 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 1), align 4, !dbg !33, !tbaa !28
36 tail call void @llvm.dbg.value(metadata i32 %1, metadata !24, metadata !DIExpression()), !dbg !34
37 tail call void @foo(i32 %0, i32 %1) #2, !dbg !35
41 declare void @foo(i32, i32) local_unnamed_addr
43 ; Function Attrs: nounwind readnone speculatable
44 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
46 ; Function Attrs: nounwind
47 declare void @llvm.stackprotector(i8*, i8**) #2
49 attributes #0 = { nounwind uwtable }
50 attributes #1 = { nounwind readnone speculatable }
51 attributes #2 = { nounwind }
54 !llvm.module.flags = !{!10, !11, !12}
57 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
58 !1 = distinct !DIGlobalVariable(name: "bar", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)
59 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0 (trunk 313866) (llvm/trunk 313875)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
60 !3 = !DIFile(filename: "live-debug-vars-unused-arg.c", directory: "/repo/uabbpet/master")
63 !6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 64, elements: !8)
64 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
66 !9 = !DISubrange(count: 2)
67 !10 = !{i32 2, !"Dwarf Version", i32 4}
68 !11 = !{i32 2, !"Debug Info Version", i32 3}
69 !12 = !{i32 1, !"wchar_size", i32 4}
70 !13 = !{!"clang version 6.0.0 (trunk 313866) (llvm/trunk 313875)"}
71 !14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 5, type: !15, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !20)
72 !15 = !DISubroutineType(types: !16)
74 !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)
75 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
76 !19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
77 !20 = !{!21, !22, !23, !24}
78 !21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 5, type: !7)
79 !22 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 5, type: !17)
80 !23 = !DILocalVariable(name: "a0", scope: !14, file: !3, line: 7, type: !7)
81 !24 = !DILocalVariable(name: "a1", scope: !14, file: !3, line: 8, type: !7)
82 !25 = !DILocation(line: 5, column: 14, scope: !14)
83 !26 = !DILocation(line: 5, column: 27, scope: !14)
84 !27 = !DILocation(line: 7, column: 12, scope: !14)
85 !28 = !{!29, !29, i64 0}
86 !29 = !{!"int", !30, i64 0}
87 !30 = !{!"omnipotent char", !31, i64 0}
88 !31 = !{!"Simple C/C++ TBAA"}
89 !32 = !DILocation(line: 7, column: 7, scope: !14)
90 !33 = !DILocation(line: 8, column: 12, scope: !14)
91 !34 = !DILocation(line: 8, column: 7, scope: !14)
92 !35 = !DILocation(line: 9, column: 3, scope: !14)
93 !36 = !DILocation(line: 10, column: 3, scope: !14)
99 exposesReturnsTwice: false
101 regBankSelected: false
103 tracksRegLiveness: true
105 - { id: 0, class: gr32, preferred-register: '' }
106 - { id: 1, class: gr64, preferred-register: '' }
107 - { id: 2, class: gr32, preferred-register: '' }
108 - { id: 3, class: gr32, preferred-register: '' }
109 - { id: 4, class: gr32, preferred-register: '' }
112 isFrameAddressTaken: false
113 isReturnAddressTaken: false
122 maxCallFrameSize: 4294967295
123 hasOpaqueSPAdjustment: false
125 hasMustTailInVarArgFunc: false
133 DBG_VALUE $edi, _, !21, !DIExpression(), debug-location !25
134 DBG_VALUE $rsi, _, !22, !DIExpression(), debug-location !26
135 %2 = MOV32rm $rip, 1, _, @bar, _, debug-location !27 :: (dereferenceable load 4 from `i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 0)`, !tbaa !28)
136 DBG_VALUE %2, _, !23, !DIExpression(), debug-location !32
137 %3 = MOV32rm $rip, 1, _, @bar + 4, _, debug-location !33 :: (dereferenceable load 4 from `i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 1)`, !tbaa !28)
138 DBG_VALUE %3, _, !24, !DIExpression(), debug-location !34
139 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35
140 $edi = COPY %2, debug-location !35
141 $esi = COPY %3, debug-location !35
142 CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit killed $esi, implicit-def $rsp, debug-location !35
143 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35
144 $eax = MOV32r0 implicit-def dead $eflags, debug-location !36
145 RET 0, killed $eax, debug-location !36
149 # Let's verify that the slot index ranges for the unused variables argc/argv,
150 # connected to physical regs $edi and $rsi, does not overlap with the ranges
151 # for %2 and %3. The register allocator is actually allocating the
152 # virtual registers # to $edi and $esi, so the ranges for argc/argv should
153 # not cover the whole BB.
155 # CHECKDBG-LABEL: ********** EMITTING LIVE DEBUG VARIABLES **********
156 # CHECKDBG-NEXT: !"argc,5" [0B;0e):0 Loc0=$edi
157 # CHECKDBG-NEXT: [0B;0e):0 %bb.0-160B
158 # CHECKDBG-NEXT: !"argv,5" [0B;0e):0 Loc0=$rsi
159 # CHECKDBG-NEXT: [0B;0e):0 %bb.0-160B
160 # CHECKDBG-NEXT: !"a0,7" [16r;64r):0 Loc0=%2
161 # CHECKDBG-NEXT: [16r;64r):0 %bb.0-160B
162 # CHECKDBG-NEXT: !"a1,8" [32r;80r):0 Loc0=%3
163 # CHECKDBG-NEXT: [32r;80r):0 %bb.0-160B