1 ; RUN: opt -S -licm %s | FileCheck %s
3 ; LICM should null out debug locations when it hoists instructions out of a loop.
6 ; clang -O0 -S -emit-llvm test.cpp -g -gline-tables-only -o t.ll
7 ; opt -S -sroa -adce -simplifycfg -reassociate -domtree -loops \
8 ; -loop-simplify -lcssa -basicaa -aa -scalar-evolution -loop-rotate t.ll > test.ll
11 ; void foo(int k, int p)
13 ; for (int i = 0; i < k; i++) {
18 ; We make sure that the instruction that is hoisted into the preheader
19 ; does not have a debug location.
20 ; CHECK: for.body.lr.ph:
21 ; CHECK: getelementptr{{.*}}%p.addr, i64 4{{.*}} !dbg [[zero:![0-9]+]]
23 ; CHECK: [[zero]] = !DILocation(line: 0
26 source_filename = "test.c"
28 ; Function Attrs: nounwind sspstrong uwtable
29 define void @foo(i32 %k, i32 %p) !dbg !7 {
31 %p.addr = alloca i32, align 4
32 store i32 %p, i32* %p.addr, align 4
33 %cmp2 = icmp slt i32 0, %k, !dbg !9
34 br i1 %cmp2, label %for.body.lr.ph, label %for.end, !dbg !9
36 for.body.lr.ph: ; preds = %entry
37 br label %for.body, !dbg !9
39 for.body: ; preds = %for.body.lr.ph, %for.body
40 %i.03 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
41 %add.ptr = getelementptr inbounds i32, i32* %p.addr, i64 4, !dbg !11
42 call void @bar(i32* %add.ptr), !dbg !11
43 %inc = add nsw i32 %i.03, 1, !dbg !12
44 %cmp = icmp slt i32 %inc, %k, !dbg !9
45 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !9, !llvm.loop !14
47 for.cond.for.end_crit_edge: ; preds = %for.body
48 br label %for.end, !dbg !9
50 for.end: ; preds = %for.cond.for.end_crit_edge, %entry
54 declare void @bar(i32*)
57 !llvm.module.flags = !{!3, !4, !5}
60 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
61 !1 = !DIFile(filename: "test.c", directory: "D:\test")
63 !3 = !{i32 2, !"Dwarf Version", i32 4}
64 !4 = !{i32 2, !"Debug Info Version", i32 3}
65 !5 = !{i32 1, !"PIC Level", i32 2}
66 !6 = !{!"clang version 3.9.1 (PS4 clang version 4.50.0.249 7e7cd823 checking)"}
67 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
68 !8 = !DISubroutineType(types: !2)
69 !9 = !DILocation(line: 4, scope: !10)
70 !10 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 1)
71 !11 = !DILocation(line: 5, scope: !7)
72 !12 = !DILocation(line: 4, scope: !13)
73 !13 = !DILexicalBlockFile(scope: !7, file: !1, discriminator: 2)
74 !14 = distinct !{!14, !15}
75 !15 = !DILocation(line: 4, scope: !7)
76 !16 = !DILocation(line: 7, scope: !7)