258 lines
11 KiB
Plaintext
258 lines
11 KiB
Plaintext
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# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
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# Test the extension of debug ranges from predecessors.
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# Generated from the source file LiveDebugValues.c:
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# #include <stdio.h>
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# int m;
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# extern int inc(int n);
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# extern int change(int n);
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# extern int modify(int n);
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# int main(int argc, char **argv) {
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# int n;
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# if (argc != 2)
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# n = 2;
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# else
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# n = atoi(argv[1]);
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# n = change(n);
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# if (n > 10) {
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# m = modify(n);
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# m = m + n; // var `m' doesn't has a dbg.value
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# }
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# else
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# m = inc(n); // var `m' doesn't has a dbg.value
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# printf("m(main): %d\n", m);
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# return 0;
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# }
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# with clang -g -O3 -c -emit-llvm LiveDebugValues.c -S -o live-debug-values.ll
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# then llc -stop-after stackmap-liveness live-debug-values.ll -o /dev/null > live-debug-values.mir
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# This case will also produce multiple locations but only the debug range
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# extension is tested here. This test case is tested with DWARF information under
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# llvm/test/DebugInfo/live-debug-values.ll and present here for testing under
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# MIR->MIR serialization.
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# DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3
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# and %bb.4.
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# CHECK: ![[N_VAR:[0-9]+]] = !DILocalVariable(name: "n",{{.*}})
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#
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# CHECK: bb.5.if.end.7:
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# CHECK: DBG_VALUE $ebx, $noreg, ![[N_VAR]], !DIExpression()
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--- |
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; ModuleID = 'live-debug-values.ll'
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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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@m = common global i32 0, align 4, !dbg !16
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@.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1
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; Function Attrs: nounwind uwtable
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define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !4 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !12, metadata !20), !dbg !21
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tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !13, metadata !20), !dbg !22
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%cmp = icmp eq i32 %argc, 2, !dbg !24
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br i1 %cmp, label %if.else, label %if.end, !dbg !26
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if.else: ; preds = %entry
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%arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27
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%0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28
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%call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #4, !dbg !32
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tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !33
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br label %if.end
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if.end: ; preds = %if.else, %entry
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%n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ]
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%call1 = tail call i32 @change(i32 %n.0) #4, !dbg !34
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tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !33
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%cmp2 = icmp sgt i32 %call1, 10, !dbg !35
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br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37
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if.then.3: ; preds = %if.end
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%call4 = tail call i32 @modify(i32 %call1) #4, !dbg !38
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%add = add nsw i32 %call4, %call1, !dbg !40
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br label %if.end.7, !dbg !41
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if.else.5: ; preds = %if.end
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%call6 = tail call i32 @inc(i32 %call1) #4, !dbg !42
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br label %if.end.7
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if.end.7: ; preds = %if.else.5, %if.then.3
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%storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ]
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store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44
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%call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #4, !dbg !46
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ret i32 0, !dbg !47
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}
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declare i32 @atoi(...) #1
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declare i32 @change(i32) #1
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declare i32 @modify(i32) #1
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declare i32 @inc(i32) #1
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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture readonly, ...) #2
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind }
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attributes #2 = { nounwind }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!17, !18}
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!llvm.ident = !{!19}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !15)
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!1 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 6, type: !5, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7, !7, !8}
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64)
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!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64)
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!10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!11 = !{!12, !13, !14}
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!12 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 6, type: !7)
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!13 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 6, type: !8)
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!14 = !DILocalVariable(name: "n", scope: !4, file: !1, line: 7, type: !7)
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!15 = !{!16}
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!16 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "m", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true), expr: !DIExpression())
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!17 = !{i32 2, !"Dwarf Version", i32 4}
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!18 = !{i32 2, !"Debug Info Version", i32 3}
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!19 = !{!"clang version 3.8.0 (trunk 253049)"}
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!20 = !DIExpression()
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!21 = !DILocation(line: 6, column: 14, scope: !4)
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!22 = !DILocation(line: 6, column: 27, scope: !23)
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!23 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1)
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!24 = !DILocation(line: 8, column: 12, scope: !25)
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!25 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7)
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!26 = !DILocation(line: 8, column: 7, scope: !4)
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!27 = !DILocation(line: 11, column: 14, scope: !25)
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!28 = !{!29, !29, i64 0}
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!29 = !{!"any pointer", !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: 11, column: 9, scope: !25)
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!33 = !DILocation(line: 7, column: 7, scope: !23)
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!34 = !DILocation(line: 12, column: 7, scope: !4)
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!35 = !DILocation(line: 13, column: 9, scope: !36)
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!36 = distinct !DILexicalBlock(scope: !4, file: !1, line: 13, column: 7)
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!37 = !DILocation(line: 13, column: 7, scope: !4)
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!38 = !DILocation(line: 14, column: 9, scope: !39)
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!39 = distinct !DILexicalBlock(scope: !36, file: !1, line: 13, column: 15)
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!40 = !DILocation(line: 15, column: 11, scope: !39)
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!41 = !DILocation(line: 16, column: 3, scope: !39)
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!42 = !DILocation(line: 18, column: 9, scope: !36)
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!43 = !DILocation(line: 15, column: 7, scope: !39)
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!44 = !{!45, !45, i64 0}
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!45 = !{!"int", !30, i64 0}
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!46 = !DILocation(line: 19, column: 3, scope: !4)
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!47 = !DILocation(line: 20, column: 3, scope: !4)
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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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tracksRegLiveness: true
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liveins:
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- { reg: '$edi' }
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- { reg: '$rsi' }
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calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx',
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'$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15',
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'$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d',
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'$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ]
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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: 8
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offsetAdjustment: 0
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maxAlignment: 0
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adjustsStack: true
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hasCalls: true
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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fixedStack:
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- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$rbx' }
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body: |
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bb.0.entry:
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successors: %bb.1.if.else(16), %bb.2.if.end(16)
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liveins: $edi, $rsi, $rbx
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 16
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CFI_INSTRUCTION offset $rbx, -16
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DBG_VALUE $edi, _, !12, !20, debug-location !21
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DBG_VALUE $rsi, _, !13, !20, debug-location !22
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$eax = MOV32rr $edi
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DBG_VALUE $eax, _, !12, !20, debug-location !21
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$edi = MOV32ri 2
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CMP32ri8 killed $eax, 2, implicit-def $eflags, debug-location !26
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JCC_1 %bb.2.if.end, 5, implicit $eflags
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bb.1.if.else:
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successors: %bb.2.if.end(0)
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liveins: $rsi
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DBG_VALUE $rsi, _, !13, !20, debug-location !22
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$rdi = MOV64rm killed $rsi, 1, _, 8, _, debug-location !27 :: (load 8 from %ir.arrayidx, !tbaa !28)
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dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
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CALL64pcrel32 @atoi, csr_64, implicit $rsp, implicit $rdi, implicit $al, implicit-def $rsp, implicit-def $eax, debug-location !32
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$edi = MOV32rr $eax, debug-location !32
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DBG_VALUE $edi, _, !14, !20, debug-location !33
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bb.2.if.end:
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successors: %bb.3.if.then.3(16), %bb.4.if.else.5(16)
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liveins: $edi
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CALL64pcrel32 @change, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !34
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$ebx = MOV32rr $eax, debug-location !34
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DBG_VALUE $ebx, _, !14, !20, debug-location !33
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CMP32ri8 $ebx, 11, implicit-def $eflags, debug-location !37
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JCC_1 %bb.4.if.else.5, 12, implicit killed $eflags, debug-location !37
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bb.3.if.then.3:
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successors: %bb.5.if.end.7(0)
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liveins: $ebx
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DBG_VALUE $ebx, _, !14, !20, debug-location !33
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$edi = MOV32rr $ebx, debug-location !38
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CALL64pcrel32 @modify, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !38
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$ecx = MOV32rr $eax, debug-location !38
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$ecx = ADD32rr killed $ecx, killed $ebx, implicit-def dead $eflags, debug-location !40
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JMP_1 %bb.5.if.end.7
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bb.4.if.else.5:
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successors: %bb.5.if.end.7(0)
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liveins: $ebx
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DBG_VALUE $ebx, _, !14, !20, debug-location !33
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$edi = MOV32rr killed $ebx, debug-location !42
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CALL64pcrel32 @inc, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !42
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$ecx = MOV32rr $eax, debug-location !42
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bb.5.if.end.7:
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liveins: $ecx
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MOV32mr $rip, 1, _, @m, _, $ecx, debug-location !43 :: (store 4 into @m, !tbaa !44)
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dead undef $edi = MOV32ri @.str, implicit-def $rdi, debug-location !46
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dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !47
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$esi = MOV32rr killed $ecx, debug-location !46
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CALL64pcrel32 @printf, csr_64, implicit $rsp, implicit $rdi, implicit $esi, implicit $al, implicit-def $rsp, implicit-def dead $eax, debug-location !46
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$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !47
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$rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !47
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RETQ $eax, debug-location !47
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...
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