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1# RUN: llc -O1 -start-before=greedy -stop-after=virtregrewriter -o - %s -experimental-debug-variable-locations=false | FileCheck -check-prefix=CHECKMIR %s2 3# This test case was generated by using the following c program:4# extern void foo(int, int);5#6# int bar[2] = {1, 2};7#8# int main(int argc, char** argv)9# {10# int a0 = bar[0];11# int a1 = bar[1];12# foo(a0, a1);13# return 0;14# }15#16# It was compiled with -g and -O1, and the mir was dumped before ra greedy.17 18--- |19 ; ModuleID = 'live-debug-vars-unused-arg.ll'20 source_filename = "live-debug-vars-unused-arg.c"21 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"22 target triple = "x86_64-unknown-linux-gnu"23 24 @bar = local_unnamed_addr global [2 x i32] [i32 1, i32 2], align 4, !dbg !025 26 ; Function Attrs: nounwind uwtable27 define i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 !dbg !14 {28 entry:29 tail call void @llvm.dbg.value(metadata i32 %argc, metadata !21, metadata !DIExpression()), !dbg !2530 tail call void @llvm.dbg.value(metadata i8** %argv, metadata !22, metadata !DIExpression()), !dbg !2631 %0 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 0), align 4, !dbg !27, !tbaa !2832 tail call void @llvm.dbg.value(metadata i32 %0, metadata !23, metadata !DIExpression()), !dbg !3233 %1 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 1), align 4, !dbg !33, !tbaa !2834 tail call void @llvm.dbg.value(metadata i32 %1, metadata !24, metadata !DIExpression()), !dbg !3435 tail call void @foo(i32 %0, i32 %1) #2, !dbg !3536 ret i32 0, !dbg !3637 }38 39 declare void @foo(i32, i32) local_unnamed_addr40 41 ; Function Attrs: nounwind readnone speculatable42 declare void @llvm.dbg.value(metadata, metadata, metadata) #143 44 ; Function Attrs: nounwind45 declare void @llvm.stackprotector(i8*, i8**) #246 47 attributes #0 = { nounwind uwtable }48 attributes #1 = { nounwind readnone speculatable }49 attributes #2 = { nounwind }50 51 !llvm.dbg.cu = !{!2}52 !llvm.module.flags = !{!10, !11, !12}53 !llvm.ident = !{!13}54 55 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())56 !1 = distinct !DIGlobalVariable(name: "bar", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)57 !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)58 !3 = !DIFile(filename: "live-debug-vars-unused-arg.c", directory: "/")59 !4 = !{}60 !5 = !{!0}61 !6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 64, elements: !8)62 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)63 !8 = !{!9}64 !9 = !DISubrange(count: 2)65 !10 = !{i32 2, !"Dwarf Version", i32 4}66 !11 = !{i32 2, !"Debug Info Version", i32 3}67 !12 = !{i32 1, !"wchar_size", i32 4}68 !13 = !{!"clang version 6.0.0 (trunk 313866) (llvm/trunk 313875)"}69 !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)70 !15 = !DISubroutineType(types: !16)71 !16 = !{!7, !7, !17}72 !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)73 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)74 !19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)75 !20 = !{!21, !22, !23, !24}76 !21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 5, type: !7)77 !22 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 5, type: !17)78 !23 = !DILocalVariable(name: "a0", scope: !14, file: !3, line: 7, type: !7)79 !24 = !DILocalVariable(name: "a1", scope: !14, file: !3, line: 8, type: !7)80 !25 = !DILocation(line: 5, column: 14, scope: !14)81 !26 = !DILocation(line: 5, column: 27, scope: !14)82 !27 = !DILocation(line: 7, column: 12, scope: !14)83 !28 = !{!29, !29, i64 0}84 !29 = !{!"int", !30, i64 0}85 !30 = !{!"omnipotent char", !31, i64 0}86 !31 = !{!"Simple C/C++ TBAA"}87 !32 = !DILocation(line: 7, column: 7, scope: !14)88 !33 = !DILocation(line: 8, column: 12, scope: !14)89 !34 = !DILocation(line: 8, column: 7, scope: !14)90 !35 = !DILocation(line: 9, column: 3, scope: !14)91 !36 = !DILocation(line: 10, column: 3, scope: !14)92 93...94---95name: main96alignment: 1697exposesReturnsTwice: false98legalized: false99regBankSelected: false100selected: false101tracksRegLiveness: true102registers:103 - { id: 0, class: gr32, preferred-register: '' }104 - { id: 1, class: gr64, preferred-register: '' }105 - { id: 2, class: gr32, preferred-register: '' }106 - { id: 3, class: gr32, preferred-register: '' }107 - { id: 4, class: gr32, preferred-register: '' }108liveins:109frameInfo:110 isFrameAddressTaken: false111 isReturnAddressTaken: false112 hasStackMap: false113 hasPatchPoint: false114 stackSize: 0115 offsetAdjustment: 0116 maxAlignment: 0117 adjustsStack: true118 hasCalls: true119 stackProtector: ''120 maxCallFrameSize: 4294967295121 hasOpaqueSPAdjustment: false122 hasVAStart: false123 hasMustTailInVarArgFunc: false124 savePoint: []125 restorePoint: []126fixedStack:127stack:128constants:129body: |130 bb.0.entry:131 DBG_VALUE $edi, _, !21, !DIExpression(), debug-location !25132 DBG_VALUE $rsi, _, !22, !DIExpression(), debug-location !26133 %2 = MOV32rm $rip, 1, _, @bar, _, debug-location !27 :: (dereferenceable load (s32) from `i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 0)`, !tbaa !28)134 DBG_VALUE %2, _, !23, !DIExpression(), debug-location !32135 %3 = MOV32rm $rip, 1, _, @bar + 4, _, debug-location !33 :: (dereferenceable load (s32) from `i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 1)`, !tbaa !28)136 DBG_VALUE %3, _, !24, !DIExpression(), debug-location !34137 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35138 $edi = COPY %2, debug-location !35139 $esi = COPY %3, debug-location !35140 CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit killed $esi, implicit-def $rsp, debug-location !35141 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35142 $eax = MOV32r0 implicit-def dead $eflags, debug-location !36143 RET 0, killed $eax, debug-location !36144 145...146 147# Verify that we only get one DBG_VALUE for argc and one for argv.148#149# CHECKMIR: ![[ARGC:[0-9]+]] = !DILocalVariable(name: "argc", arg: 1150# CHECKMIR: ![[ARGV:[0-9]+]] = !DILocalVariable(name: "argv", arg: 2151# CHECKMIR: name: main152# CHECKMIR: body:153# CHECKMIR: DBG_VALUE $edi, $noreg, ![[ARGC]]154# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGC]]155# CHECKMIR: DBG_VALUE $rsi, $noreg, ![[ARGV]]156# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGC]]157# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGV]]158 159