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1; FIXME: use -stop-after when MIR serialization output includes needed debug info.2; RUN: llc < %s -print-after=wasm-reg-stackify 2>&1 | FileCheck %s3 4; CHECK: {{.*}}After WebAssembly Register Stackify5; CHECK: bb.3.for.body.for.body_crit_edge:6; CHECK: [[REG:%[0-9]+]]:i32 = nsw ADD_I32 {{.*}} fib.c:7:77; CHECK-NEXT: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib.c:5:138 9; ModuleID = 'fib.bc'10; The test generated via: clang --target=wasm32-unknown-unknown-wasm fib.c -g -O211; All lifetime markers and attributes were removed.12source_filename = "fib.c"13; void swap(int* a, int* b);14;15; __attribute__ ((visibility ("default")))16; int fib(int n) {17; int i, t, a = 0, b = 1;18; for (i = 0; i < n; i++) {19; a += b;20; swap(&a, &b);21; }22; return b;23; }24target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"25target triple = "wasm32-unknown-unknown-wasm"26 27; Function Attrs: nounwind28define i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 {29entry:30 %a = alloca i32, align 431 %b = alloca i32, align 432 call void @llvm.dbg.value(metadata i32 %n, metadata !12, metadata !DIExpression()), !dbg !1733 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !1934 store i32 0, ptr %a, align 4, !dbg !19, !tbaa !2035 call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !2436 store i32 1, ptr %b, align 4, !dbg !24, !tbaa !2037 call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !2538 %cmp4 = icmp sgt i32 %n, 0, !dbg !2639 call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !2440 br i1 %cmp4, label %for.body.preheader, label %for.end, !dbg !2941 42for.body.preheader: ; preds = %entry43 call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !2544 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !1945 call void @llvm.dbg.value(metadata i32 1, metadata !15, metadata !DIExpression()), !dbg !1946 store i32 1, ptr %a, align 4, !dbg !30, !tbaa !2047 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !1948 call void @llvm.dbg.value(metadata ptr %b, metadata !16, metadata !DIExpression()), !dbg !2449 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !3250 call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !2551 %0 = load i32, ptr %b, align 4, !dbg !33, !tbaa !2052 call void @llvm.dbg.value(metadata i32 %0, metadata !16, metadata !DIExpression()), !dbg !2453 %exitcond9 = icmp eq i32 %n, 1, !dbg !2654 br i1 %exitcond9, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !3455 56for.body.for.body_crit_edge: ; preds = %for.body.preheader, %for.body.for.body_crit_edge57 %1 = phi i32 [ %2, %for.body.for.body_crit_edge ], [ %0, %for.body.preheader ]58 %inc10 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 1, %for.body.preheader ]59 %.pre = load i32, ptr %a, align 4, !dbg !30, !tbaa !2060 call void @llvm.dbg.value(metadata i32 %inc10, metadata !13, metadata !DIExpression()), !dbg !2561 call void @llvm.dbg.value(metadata i32 %.pre, metadata !15, metadata !DIExpression()), !dbg !1962 %add = add nsw i32 %.pre, %1, !dbg !3063 call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !1964 store i32 %add, ptr %a, align 4, !dbg !30, !tbaa !2065 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !1966 call void @llvm.dbg.value(metadata ptr %b, metadata !16, metadata !DIExpression()), !dbg !2467 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !3268 %inc = add nuw nsw i32 %inc10, 1, !dbg !3669 call void @llvm.dbg.value(metadata i32 %inc, metadata !13, metadata !DIExpression()), !dbg !2570 %2 = load i32, ptr %b, align 4, !dbg !33, !tbaa !2071 call void @llvm.dbg.value(metadata i32 %2, metadata !16, metadata !DIExpression()), !dbg !2472 %exitcond = icmp eq i32 %inc, %n, !dbg !2673 br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !3474 75for.end: ; preds = %for.body.for.body_crit_edge, %for.body.preheader, %entry76 %.lcssa = phi i32 [ 1, %entry ], [ %0, %for.body.preheader ], [ %2, %for.body.for.body_crit_edge ]77 ret i32 %.lcssa, !dbg !3878}79 80declare void @swap(ptr, ptr) local_unnamed_addr #281 82; Function Attrs: nounwind readnone speculatable83declare void @llvm.dbg.value(metadata, metadata, metadata) #484 85!llvm.dbg.cu = !{!0}86!llvm.module.flags = !{!3, !4, !5}87!llvm.ident = !{!6}88 89!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 334610)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)90!1 = !DIFile(filename: "fib.c", directory: "/d/y/llvmwasm")91!2 = !{}92!3 = !{i32 2, !"Dwarf Version", i32 4}93!4 = !{i32 2, !"Debug Info Version", i32 3}94!5 = !{i32 1, !"wchar_size", i32 4}95!6 = !{!"clang version 7.0.0 (trunk 334610)"}96!7 = distinct !DISubprogram(name: "fib", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)97!8 = !DISubroutineType(types: !9)98!9 = !{!10, !10}99!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)100!11 = !{!12, !13, !14, !15, !16}101!12 = !DILocalVariable(name: "n", arg: 1, scope: !7, file: !1, line: 4, type: !10)102!13 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 5, type: !10)103!14 = !DILocalVariable(name: "t", scope: !7, file: !1, line: 5, type: !10)104!15 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 5, type: !10)105!16 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 5, type: !10)106!17 = !DILocation(line: 4, column: 13, scope: !7)107!18 = !DILocation(line: 5, column: 3, scope: !7)108!19 = !DILocation(line: 5, column: 13, scope: !7)109!20 = !{!21, !21, i64 0}110!21 = !{!"int", !22, i64 0}111!22 = !{!"omnipotent char", !23, i64 0}112!23 = !{!"Simple C/C++ TBAA"}113!24 = !DILocation(line: 5, column: 20, scope: !7)114!25 = !DILocation(line: 5, column: 7, scope: !7)115!26 = !DILocation(line: 6, column: 17, scope: !27)116!27 = distinct !DILexicalBlock(scope: !28, file: !1, line: 6, column: 3)117!28 = distinct !DILexicalBlock(scope: !7, file: !1, line: 6, column: 3)118!29 = !DILocation(line: 6, column: 3, scope: !28)119!30 = !DILocation(line: 7, column: 7, scope: !31)120!31 = distinct !DILexicalBlock(scope: !27, file: !1, line: 6, column: 27)121!32 = !DILocation(line: 8, column: 5, scope: !31)122!33 = !DILocation(line: 0, scope: !7)123!34 = distinct !{!34, !29, !35}124!35 = !DILocation(line: 9, column: 3, scope: !28)125!36 = !DILocation(line: 6, column: 23, scope: !27)126!37 = !DILocation(line: 11, column: 1, scope: !7)127!38 = !DILocation(line: 10, column: 3, scope: !7)128!39 = distinct !DISubprogram(name: "_start", scope: !1, file: !1, line: 13, type: !40, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: true, unit: !0, retainedNodes: !2)129!40 = !DISubroutineType(types: !41)130!41 = !{null}131!42 = !DILocation(line: 13, column: 16, scope: !39)132