1 ; RUN: opt --passes=licm -S -o - < %s | FileCheck %s
3 ; Building the test case with `clang -O2 -g` the call to 'getInOrder'
4 ; on line 16 is sunk out of the loop by LICM.
5 ; According to 'HowToUpdateDebugInfo' the source location of the sunk
6 ; call should be dropped.
8 ; 1 __attribute__((noinline)) int getInOrder(int Idx) {
9 ; 2 static int InOrder[] = { 0, 1 };
10 ; 3 return InOrder[Idx];
13 ; 6 __attribute__((noinline)) int getRandVar(int Idx) {
14 ; 7 static int RandVars[] = { 4, 4 };
15 ; 8 return RandVars[Idx];
21 ; 14 for (int I = 0; I < 2; ++I) {
22 ; 15 Sum += getRandVar(I);
23 ; 16 Extra = getInOrder(I);
26 ; 19 return Sum + Extra;
29 ; CHECK-LABEL: for.end:
30 ; CHECK: tail call noundef i32 @getInOrder({{.*}}), !dbg ![[DBG:[0-9]+]]
31 ; CHECK-DAG: ![[DBG]] = !DILocation(line: 0, scope: ![[SCOPE:[0-9]+]]
32 ; CHECK-DAG: ![[SCOPE]] = distinct !DISubprogram(name: "bounce",
34 define noundef i32 @getInOrder(i32 noundef %Idx) #0 !dbg !9 {
39 define noundef i32 @getRandVar(i32 noundef %Idx) #0 !dbg !15 {
44 define noundef i32 @bounce() !dbg !17 {
46 br label %for.body, !dbg !20
48 for.body: ; preds = %entry, %for.body
49 %I.07 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
50 %Sum.06 = phi i32 [ 0, %entry ], [ %rem, %for.body ]
51 %call = tail call noundef i32 @getRandVar(i32 noundef %I.07), !dbg !21
52 %add = add nsw i32 %call, %Sum.06, !dbg !21
53 %call1 = tail call noundef i32 @getInOrder(i32 noundef %I.07), !dbg !22
54 %rem = srem i32 %add, 4, !dbg !23
55 %inc = add nuw nsw i32 %I.07, 1, !dbg !20
56 %cmp = icmp ult i32 %inc, 2, !dbg !20
57 br i1 %cmp, label %for.body, label %for.end, !dbg !20, !llvm.loop !24
59 for.end: ; preds = %for.body
60 %Sum.0.lcssa = phi i32 [ %rem, %for.body ], !dbg !27
61 %Extra.0.lcssa = phi i32 [ %call1, %for.body ], !dbg !27
62 %add2 = add nsw i32 %Extra.0.lcssa, %Sum.0.lcssa, !dbg !28
63 ret i32 %add2, !dbg !28
66 attributes #0 = { noinline nounwind willreturn memory(none) }
69 !llvm.module.flags = !{!2, !3, !4, !5, !6, !7}
72 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 17.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: None)
73 !1 = !DIFile(filename: "test.cpp", directory: "", checksumkind: CSK_MD5, checksum: "cce1594f8ccf16528cd91ee35b0c1fea")
74 !2 = !{i32 2, !"CodeView", i32 1}
75 !3 = !{i32 2, !"Debug Info Version", i32 3}
76 !4 = !{i32 1, !"wchar_size", i32 2}
77 !5 = !{i32 8, !"PIC Level", i32 2}
78 !6 = !{i32 7, !"uwtable", i32 2}
79 !7 = !{i32 1, !"MaxTLSAlign", i32 65536}
80 !8 = !{!"clang version 17.0.0"}
81 !9 = distinct !DISubprogram(name: "getInOrder", scope: !1, file: !1, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
82 !10 = !DISubroutineType(types: !11)
84 !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
86 !14 = !DILocation(line: 3, scope: !9)
87 !15 = distinct !DISubprogram(name: "getRandVar", scope: !1, file: !1, line: 6, type: !10, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
88 !16 = !DILocation(line: 8, scope: !15)
89 !17 = distinct !DISubprogram(name: "bounce", scope: !1, file: !1, line: 11, type: !18, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
90 !18 = !DISubroutineType(types: !19)
92 !20 = !DILocation(line: 14, scope: !17)
93 !21 = !DILocation(line: 15, scope: !17)
94 !22 = !DILocation(line: 16, scope: !17)
95 !23 = !DILocation(line: 17, scope: !17)
96 !24 = distinct !{!24, !20, !25, !26}
97 !25 = !DILocation(line: 18, scope: !17)
98 !26 = !{!"llvm.loop.mustprogress"}
99 !27 = !DILocation(line: 0, scope: !17)
100 !28 = !DILocation(line: 19, scope: !17)