1; FIXME: use -stop-after when MIR serialization output includes needed debug info. 2; RUN: llc < %s -print-after=wasm-optimize-live-intervals 2>&1 | FileCheck %s 3 4; CHECK: {{.*}}After WebAssembly Optimize Live Intervals 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: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib.c:5:13 8 9; ModuleID = 'fib.bc' 10source_filename = "fib.c" 11; void swap(int* a, int* b); 12; 13; __attribute__ ((visibility ("default"))) 14; int fib(int n) { 15; int i, t, a = 0, b = 1; 16; for (i = 0; i < n; i++) { 17; a += b; 18; swap(&a, &b); 19; } 20; return b; 21; } 22target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" 23target triple = "wasm32-unknown-unknown-wasm" 24 25; Function Attrs: nounwind 26define i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 { 27entry: 28 %a = alloca i32, align 4 29 %b = alloca i32, align 4 30 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19 31 store i32 0, ptr %a, align 4, !dbg !19, !tbaa !20 32 store i32 1, ptr %b, align 4, !dbg !24, !tbaa !20 33 %cmp4 = icmp sgt i32 %n, 0, !dbg !26 34 br i1 %cmp4, label %for.body.preheader, label %for.end, !dbg !29 35 36for.body.preheader: ; preds = %entry 37 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19 38 store i32 1, ptr %a, align 4, !dbg !30, !tbaa !20 39 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !19 40 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !32 41 %0 = load i32, ptr %b, align 4, !dbg !33, !tbaa !20 42 %exitcond9 = icmp eq i32 %n, 1, !dbg !26 43 br i1 %exitcond9, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34 44 45for.body.for.body_crit_edge: ; preds = %for.body.preheader, %for.body.for.body_crit_edge 46 %1 = phi i32 [ %2, %for.body.for.body_crit_edge ], [ %0, %for.body.preheader ] 47 %inc10 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 1, %for.body.preheader ] 48 %.pre = load i32, ptr %a, align 4, !dbg !30, !tbaa !20 49 call void @llvm.dbg.value(metadata i32 %.pre, metadata !15, metadata !DIExpression()), !dbg !19 50 %add = add nsw i32 %.pre, %1, !dbg !30 51 call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !19 52 store i32 %add, ptr %a, align 4, !dbg !30, !tbaa !20 53 call void @llvm.dbg.value(metadata ptr %a, metadata !15, metadata !DIExpression()), !dbg !19 54 call void @swap(ptr nonnull %a, ptr nonnull %b) #5, !dbg !32 55 %inc = add nuw nsw i32 %inc10, 1, !dbg !36 56 %2 = load i32, ptr %b, align 4, !dbg !33, !tbaa !20 57 %exitcond = icmp eq i32 %inc, %n, !dbg !26 58 br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34 59 60for.end: ; preds = %for.body.for.body_crit_edge, %for.body.preheader, %entry 61 %.lcssa = phi i32 [ 1, %entry ], [ %0, %for.body.preheader ], [ %2, %for.body.for.body_crit_edge ] 62 ret i32 %.lcssa, !dbg !38 63} 64 65declare void @swap(ptr, ptr) local_unnamed_addr #2 66 67; Function Attrs: nounwind readnone speculatable 68declare void @llvm.dbg.value(metadata, metadata, metadata) #4 69 70!llvm.dbg.cu = !{!0} 71!llvm.module.flags = !{!3, !4, !5} 72!llvm.ident = !{!6} 73 74!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) 75!1 = !DIFile(filename: "fib.c", directory: "/d/y/llvmwasm") 76!2 = !{} 77!3 = !{i32 2, !"Dwarf Version", i32 4} 78!4 = !{i32 2, !"Debug Info Version", i32 3} 79!5 = !{i32 1, !"wchar_size", i32 4} 80!6 = !{!"clang version 7.0.0 (trunk 334610)"} 81!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) 82!8 = !DISubroutineType(types: !9) 83!9 = !{!10, !10} 84!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 85!11 = !{!15} 86!15 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 5, type: !10) 87!17 = !DILocation(line: 4, column: 13, scope: !7) 88!18 = !DILocation(line: 5, column: 3, scope: !7) 89!19 = !DILocation(line: 5, column: 13, scope: !7) 90!20 = !{!21, !21, i64 0} 91!21 = !{!"int", !22, i64 0} 92!22 = !{!"omnipotent char", !23, i64 0} 93!23 = !{!"Simple C/C++ TBAA"} 94!24 = !DILocation(line: 5, column: 20, scope: !7) 95!25 = !DILocation(line: 5, column: 7, scope: !7) 96!26 = !DILocation(line: 6, column: 17, scope: !27) 97!27 = distinct !DILexicalBlock(scope: !28, file: !1, line: 6, column: 3) 98!28 = distinct !DILexicalBlock(scope: !7, file: !1, line: 6, column: 3) 99!29 = !DILocation(line: 6, column: 3, scope: !28) 100!30 = !DILocation(line: 7, column: 7, scope: !31) 101!31 = distinct !DILexicalBlock(scope: !27, file: !1, line: 6, column: 27) 102!32 = !DILocation(line: 8, column: 5, scope: !31) 103!33 = !DILocation(line: 0, scope: !7) 104!34 = distinct !{!34, !29, !35} 105!35 = !DILocation(line: 9, column: 3, scope: !28) 106!36 = !DILocation(line: 6, column: 23, scope: !27) 107!37 = !DILocation(line: 11, column: 1, scope: !7) 108!38 = !DILocation(line: 10, column: 3, scope: !7) 109