xref: /llvm-project/llvm/test/DebugInfo/Generic/assignment-tracking/loop-vectorize/remove-redundant-dbg.ll (revision 094572701dce4aaf36f4521d6cf750420d39f206) 
1; RUN: opt %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=2 -S -o - \
2; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
3; RUN: opt --try-experimental-debuginfo-iterators %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=2 -S -o - \
4; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg"
5
6;; Check that loop-vectorize removes redundant debug intrinsics after it makes
7;; a change. This has a significant positive impact on peak memory and compiler
8;; run time.
9
10;; Check there is only one dbg.assign.
11; CHECK: #dbg_assign
12
13;; Check that the loop was actually modified.
14; CHECK: extractelement
15
16
17define void @test1(ptr noalias nocapture %a, ptr noalias nocapture readonly %b) {
18entry:
19  call void @llvm.dbg.assign(metadata ptr %a, metadata !11, metadata !DIExpression(), metadata !16, metadata ptr undef, metadata !DIExpression()), !dbg !28
20  call void @llvm.dbg.assign(metadata ptr %a, metadata !11, metadata !DIExpression(), metadata !16, metadata ptr undef, metadata !DIExpression()), !dbg !28
21  br label %for.body
22
23for.body:                                         ; preds = %for.body, %entry
24  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
25  %arrayidx = getelementptr inbounds float, ptr %b, i64 %indvars.iv
26  %0 = load float, ptr %arrayidx, align 4
27  %cmp1 = fcmp ogt float %0, 1.000000e+02
28  tail call void @llvm.assume(i1 %cmp1)
29  %add = fadd float %0, 1.000000e+00
30  %arrayidx5 = getelementptr inbounds float, ptr %a, i64 %indvars.iv
31  store float %add, ptr %arrayidx5, align 4
32  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
33  %exitcond = icmp eq i64 %indvars.iv, 1599
34  br i1 %exitcond, label %for.end, label %for.body
35
36for.end:                                          ; preds = %for.body
37  ret void
38}
39
40declare void @llvm.assume(i1) #0
41declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
42
43!llvm.dbg.cu = !{!0}
44!llvm.module.flags = !{!2, !3, !4, !5, !1000}
45!llvm.ident = !{!6}
46
47!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
48!1 = !DIFile(filename: "test.cpp", directory: "/")
49!2 = !{i32 7, !"Dwarf Version", i32 5}
50!3 = !{i32 2, !"Debug Info Version", i32 3}
51!4 = !{i32 1, !"wchar_size", i32 4}
52!5 = !{i32 7, !"uwtable", i32 1}
53!6 = !{!"clang version 14.0.0)"}
54!7 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
55!8 = !DISubroutineType(types: !9)
56!9 = !{null}
57!10 = !{!11}
58!11 = !DILocalVariable(name: "Counter", scope: !7, file: !1, line: 3, type: !12)
59!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
60!16 = distinct !DIAssignID()
61!19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 3)
62!28 = !DILocation(line: 6, column: 1, scope: !7)
63!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
64