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.2.for.body:
6; CHECK: [[REG:%[0-9]+]]:i32 = TEE_I32 {{.*}} fib2.c:6:7
7; CHECK-NEXT: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib2.c:2:13
8
9; ModuleID = 'fib2.bc'
10; The test generated via: clang --target=wasm32-unknown-unknown-wasm fib2.c -g -O2
11; All non-"!dbg !18" llvm.dbg.value calls and attributes were removed.
12source_filename = "fib2.c"
13; int fib(int n) {
14;   int i, t, a = 0, b = 1;
15;   for (i = 0; i < n; i++) {
16;     t = a;
17;     a = b;
18;     b += t;
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 readnone
26define hidden i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 {
27entry:
28  call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !18
29  %cmp8 = icmp sgt i32 %n, 0, !dbg !21
30  br i1 %cmp8, label %for.body, label %for.end, !dbg !24
31
32for.body:                                         ; preds = %entry, %for.body
33  %b.011 = phi i32 [ %add, %for.body ], [ 1, %entry ]
34  %a.010 = phi i32 [ %b.011, %for.body ], [ 0, %entry ]
35  %i.09 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
36  call void @llvm.dbg.value(metadata i32 %a.010, metadata !15, metadata !DIExpression()), !dbg !18
37  %add = add nsw i32 %b.011, %a.010, !dbg !26
38  %inc = add nuw nsw i32 %i.09, 1, !dbg !28
39  call void @llvm.dbg.value(metadata i32 %b.011, metadata !15, metadata !DIExpression()), !dbg !18
40  %exitcond = icmp eq i32 %inc, %n, !dbg !21
41  br i1 %exitcond, label %for.end, label %for.body, !dbg !24, !llvm.loop !29
42
43for.end:                                          ; preds = %for.body, %entry
44  %b.0.lcssa = phi i32 [ 1, %entry ], [ %add, %for.body ]
45  ret i32 %b.0.lcssa, !dbg !31
46}
47
48; Function Attrs: nounwind readnone speculatable
49declare void @llvm.dbg.value(metadata, metadata, metadata) #1
50
51!llvm.dbg.cu = !{!0}
52!llvm.module.flags = !{!3, !4, !5}
53!llvm.ident = !{!6}
54
55!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 337180)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
56!1 = !DIFile(filename: "fib2.c", directory: "/d/y/llvmwasm")
57!2 = !{}
58!3 = !{i32 2, !"Dwarf Version", i32 4}
59!4 = !{i32 2, !"Debug Info Version", i32 3}
60!5 = !{i32 1, !"wchar_size", i32 4}
61!6 = !{!"clang version 7.0.0 (trunk 337180)"}
62!7 = distinct !DISubprogram(name: "fib", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
63!8 = !DISubroutineType(types: !9)
64!9 = !{!10, !10}
65!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
66!11 = !{!15}
67!15 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 2, type: !10)
68!17 = !DILocation(line: 1, column: 13, scope: !7)
69!18 = !DILocation(line: 2, column: 13, scope: !7)
70!19 = !DILocation(line: 2, column: 20, scope: !7)
71!20 = !DILocation(line: 2, column: 7, scope: !7)
72!21 = !DILocation(line: 3, column: 17, scope: !22)
73!22 = distinct !DILexicalBlock(scope: !23, file: !1, line: 3, column: 3)
74!23 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 3)
75!24 = !DILocation(line: 3, column: 3, scope: !23)
76!25 = !DILocation(line: 2, column: 10, scope: !7)
77!26 = !DILocation(line: 6, column: 7, scope: !27)
78!27 = distinct !DILexicalBlock(scope: !22, file: !1, line: 3, column: 27)
79!28 = !DILocation(line: 3, column: 23, scope: !22)
80!29 = distinct !{!29, !24, !30}
81!30 = !DILocation(line: 7, column: 3, scope: !23)
82!31 = !DILocation(line: 8, column: 3, scope: !7)
83