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 %s 3 4; CHECK: {{.*}}After WebAssembly Register Stackify 5; CHECK: bb.3.for.body.for.body_crit_edge: 6; CHECK: [[REG:%[0-9]+]]:i32 = nsw ADD_I32 {{.*}} fib.c:7:7 7; CHECK-NEXT: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib.c:5:13 8 9; ModuleID = 'fib.bc' 10; The test generated via: clang --target=wasm32-unknown-unknown-wasm fib.c -g -O2 11; 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: nounwind 28define i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 { 29entry: 30 %a = alloca i32, align 4 31 %b = alloca i32, align 4 32 call void @llvm.dbg.value(metadata i32 %n, metadata !12, metadata !DIExpression()), !dbg !17 33 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19 34 store i32 0, ptr %a, align 4, !dbg !19, !tbaa !20 35 call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !24 36 store i32 1, ptr %b, align 4, !dbg !24, !tbaa !20 37 call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !25 38 %cmp4 = icmp sgt i32 %n, 0, !dbg !26 39 call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !24 40 br i1 %cmp4, label %for.body.preheader, label %for.end, !dbg !29 41 42for.body.preheader: ; preds = %entry 43 call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !25 44 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19 45 call void @llvm.dbg.value(metadata i32 1, metadata !15, metadata !DIExpression()), !dbg !19 46 store i32 1, ptr %a, align 4, !dbg !30, !tbaa !20 47 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !19 48 call void @llvm.dbg.value(metadata ptr %b, metadata !16, metadata !DIExpression()), !dbg !24 49 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !32 50 call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !25 51 %0 = load i32, ptr %b, align 4, !dbg !33, !tbaa !20 52 call void @llvm.dbg.value(metadata i32 %0, metadata !16, metadata !DIExpression()), !dbg !24 53 %exitcond9 = icmp eq i32 %n, 1, !dbg !26 54 br i1 %exitcond9, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34 55 56for.body.for.body_crit_edge: ; preds = %for.body.preheader, %for.body.for.body_crit_edge 57 %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 !20 60 call void @llvm.dbg.value(metadata i32 %inc10, metadata !13, metadata !DIExpression()), !dbg !25 61 call void @llvm.dbg.value(metadata i32 %.pre, metadata !15, metadata !DIExpression()), !dbg !19 62 %add = add nsw i32 %.pre, %1, !dbg !30 63 call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !19 64 store i32 %add, ptr %a, align 4, !dbg !30, !tbaa !20 65 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !19 66 call void @llvm.dbg.value(metadata ptr %b, metadata !16, metadata !DIExpression()), !dbg !24 67 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !32 68 %inc = add nuw nsw i32 %inc10, 1, !dbg !36 69 call void @llvm.dbg.value(metadata i32 %inc, metadata !13, metadata !DIExpression()), !dbg !25 70 %2 = load i32, ptr %b, align 4, !dbg !33, !tbaa !20 71 call void @llvm.dbg.value(metadata i32 %2, metadata !16, metadata !DIExpression()), !dbg !24 72 %exitcond = icmp eq i32 %inc, %n, !dbg !26 73 br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34 74 75for.end: ; preds = %for.body.for.body_crit_edge, %for.body.preheader, %entry 76 %.lcssa = phi i32 [ 1, %entry ], [ %0, %for.body.preheader ], [ %2, %for.body.for.body_crit_edge ] 77 ret i32 %.lcssa, !dbg !38 78} 79 80declare void @swap(ptr, ptr) local_unnamed_addr #2 81 82; Function Attrs: nounwind readnone speculatable 83declare void @llvm.dbg.value(metadata, metadata, metadata) #4 84 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