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159 lines
6.9 KiB
159 lines
6.9 KiB
# RUN: llc -O1 -start-before=greedy -stop-after=virtregrewriter -o - %s | FileCheck -check-prefix=CHECKMIR %s
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# This test case was generated by using the following c program:
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# extern void foo(int, int);
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#
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# int bar[2] = {1, 2};
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#
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# int main(int argc, char** argv)
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# {
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# int a0 = bar[0];
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# int a1 = bar[1];
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# foo(a0, a1);
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# return 0;
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# }
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#
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# It was compiled with -g and -O1, and the mir was dumped before ra greedy.
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--- |
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; ModuleID = 'live-debug-vars-unused-arg.ll'
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source_filename = "live-debug-vars-unused-arg.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@bar = local_unnamed_addr global [2 x i32] [i32 1, i32 2], align 4, !dbg !0
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; Function Attrs: nounwind uwtable
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define i32 @main(i32 %argc, i8** nocapture readnone %argv) local_unnamed_addr #0 !dbg !14 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %argc, metadata !21, metadata !DIExpression()), !dbg !25
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tail call void @llvm.dbg.value(metadata i8** %argv, metadata !22, metadata !DIExpression()), !dbg !26
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%0 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 0), align 4, !dbg !27, !tbaa !28
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tail call void @llvm.dbg.value(metadata i32 %0, metadata !23, metadata !DIExpression()), !dbg !32
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%1 = load i32, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @bar, i64 0, i64 1), align 4, !dbg !33, !tbaa !28
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tail call void @llvm.dbg.value(metadata i32 %1, metadata !24, metadata !DIExpression()), !dbg !34
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tail call void @foo(i32 %0, i32 %1) #2, !dbg !35
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ret i32 0, !dbg !36
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}
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declare void @foo(i32, i32) local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #2
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind readnone speculatable }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!10, !11, !12}
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!llvm.ident = !{!13}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "bar", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)
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!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)
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!3 = !DIFile(filename: "live-debug-vars-unused-arg.c", directory: "/repo/uabbpet/master")
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!4 = !{}
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!5 = !{!0}
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!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 64, elements: !8)
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!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!8 = !{!9}
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!9 = !DISubrange(count: 2)
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!10 = !{i32 2, !"Dwarf Version", i32 4}
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!11 = !{i32 2, !"Debug Info Version", i32 3}
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!12 = !{i32 1, !"wchar_size", i32 4}
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!13 = !{!"clang version 6.0.0 (trunk 313866) (llvm/trunk 313875)"}
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!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)
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!15 = !DISubroutineType(types: !16)
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!16 = !{!7, !7, !17}
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!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)
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!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
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!19 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!20 = !{!21, !22, !23, !24}
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!21 = !DILocalVariable(name: "argc", arg: 1, scope: !14, file: !3, line: 5, type: !7)
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!22 = !DILocalVariable(name: "argv", arg: 2, scope: !14, file: !3, line: 5, type: !17)
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!23 = !DILocalVariable(name: "a0", scope: !14, file: !3, line: 7, type: !7)
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!24 = !DILocalVariable(name: "a1", scope: !14, file: !3, line: 8, type: !7)
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!25 = !DILocation(line: 5, column: 14, scope: !14)
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!26 = !DILocation(line: 5, column: 27, scope: !14)
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!27 = !DILocation(line: 7, column: 12, scope: !14)
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!28 = !{!29, !29, i64 0}
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!29 = !{!"int", !30, i64 0}
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!30 = !{!"omnipotent char", !31, i64 0}
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!31 = !{!"Simple C/C++ TBAA"}
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!32 = !DILocation(line: 7, column: 7, scope: !14)
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!33 = !DILocation(line: 8, column: 12, scope: !14)
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!34 = !DILocation(line: 8, column: 7, scope: !14)
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!35 = !DILocation(line: 9, column: 3, scope: !14)
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!36 = !DILocation(line: 10, column: 3, scope: !14)
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...
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---
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name: main
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alignment: 16
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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- { id: 0, class: gr32, preferred-register: '' }
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- { id: 1, class: gr64, preferred-register: '' }
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- { id: 2, class: gr32, preferred-register: '' }
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- { id: 3, class: gr32, preferred-register: '' }
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- { id: 4, class: gr32, preferred-register: '' }
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liveins:
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 0
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offsetAdjustment: 0
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maxAlignment: 0
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adjustsStack: false
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 4294967295
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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savePoint: ''
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restorePoint: ''
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fixedStack:
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stack:
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constants:
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body: |
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bb.0.entry:
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DBG_VALUE $edi, _, !21, !DIExpression(), debug-location !25
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DBG_VALUE $rsi, _, !22, !DIExpression(), debug-location !26
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%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)
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DBG_VALUE %2, _, !23, !DIExpression(), debug-location !32
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%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)
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DBG_VALUE %3, _, !24, !DIExpression(), debug-location !34
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ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35
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$edi = COPY %2, debug-location !35
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$esi = COPY %3, debug-location !35
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CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit killed $esi, implicit-def $rsp, debug-location !35
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ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !35
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$eax = MOV32r0 implicit-def dead $eflags, debug-location !36
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RET 0, killed $eax, debug-location !36
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...
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# Verify that we only get one DBG_VALUE for argc and one for argv.
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#
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# CHECKMIR: ![[ARGC:[0-9]+]] = !DILocalVariable(name: "argc", arg: 1
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# CHECKMIR: ![[ARGV:[0-9]+]] = !DILocalVariable(name: "argv", arg: 2
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# CHECKMIR: name: main
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# CHECKMIR: body:
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# CHECKMIR: DBG_VALUE $edi, $noreg, ![[ARGC]]
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# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGC]]
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# CHECKMIR: DBG_VALUE $rsi, $noreg, ![[ARGV]]
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# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGC]]
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# CHECKMIR-NOT: DBG_VALUE %{{.*}}, $noreg, ![[ARGV]]
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