100 lines
3.9 KiB
LLVM
100 lines
3.9 KiB
LLVM
; RUN: opt --passes=licm -S -o - < %s | FileCheck %s
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; Building the test case with `clang -O2 -g` the call to 'getInOrder'
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; on line 16 is sunk out of the loop by LICM.
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; According to 'HowToUpdateDebugInfo' the source location of the sunk
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; call should be dropped.
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; 1 __attribute__((noinline)) int getInOrder(int Idx) {
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; 2 static int InOrder[] = { 0, 1 };
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; 3 return InOrder[Idx];
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; 4 }
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; 5
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; 6 __attribute__((noinline)) int getRandVar(int Idx) {
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; 7 static int RandVars[] = { 4, 4 };
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; 8 return RandVars[Idx];
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; 9 }
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; 10
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; 11 int bounce() {
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; 12 int Sum = 0;
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; 13 int Extra = 0;
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; 14 for (int I = 0; I < 2; ++I) {
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; 15 Sum += getRandVar(I);
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; 16 Extra = getInOrder(I);
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; 17 Sum %= 4;
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; 18 }
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; 19 return Sum + Extra;
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; 20 }
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; CHECK-LABEL: for.end:
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; CHECK: tail call noundef i32 @getInOrder({{.*}}), !dbg ![[DBG:[0-9]+]]
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; CHECK-DAG: ![[DBG]] = !DILocation(line: 0, scope: ![[SCOPE:[0-9]+]]
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; CHECK-DAG: ![[SCOPE]] = distinct !DISubprogram(name: "bounce",
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define noundef i32 @getInOrder(i32 noundef %Idx) #0 !dbg !9 {
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entry:
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ret i32 2
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}
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define noundef i32 @getRandVar(i32 noundef %Idx) #0 !dbg !15 {
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entry:
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ret i32 4
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}
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define noundef i32 @bounce() !dbg !17 {
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entry:
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br label %for.body, !dbg !20
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for.body: ; preds = %entry, %for.body
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%I.07 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%Sum.06 = phi i32 [ 0, %entry ], [ %rem, %for.body ]
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%call = tail call noundef i32 @getRandVar(i32 noundef %I.07), !dbg !21
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%add = add nsw i32 %call, %Sum.06, !dbg !21
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%call1 = tail call noundef i32 @getInOrder(i32 noundef %I.07), !dbg !22
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%rem = srem i32 %add, 4, !dbg !23
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%inc = add nuw nsw i32 %I.07, 1, !dbg !20
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%cmp = icmp ult i32 %inc, 2, !dbg !20
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br i1 %cmp, label %for.body, label %for.end, !dbg !20, !llvm.loop !24
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for.end: ; preds = %for.body
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%Sum.0.lcssa = phi i32 [ %rem, %for.body ], !dbg !27
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%Extra.0.lcssa = phi i32 [ %call1, %for.body ], !dbg !27
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%add2 = add nsw i32 %Extra.0.lcssa, %Sum.0.lcssa, !dbg !28
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ret i32 %add2, !dbg !28
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}
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attributes #0 = { noinline nounwind willreturn memory(none) }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !6, !7}
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!llvm.ident = !{!8}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: "", checksumkind: CSK_MD5, checksum: "cce1594f8ccf16528cd91ee35b0c1fea")
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!2 = !{i32 2, !"CodeView", i32 1}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 2}
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!5 = !{i32 8, !"PIC Level", i32 2}
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!6 = !{i32 7, !"uwtable", i32 2}
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!7 = !{i32 1, !"MaxTLSAlign", i32 65536}
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!8 = !{!"clang version 17.0.0"}
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!9 = distinct !DISubprogram(name: "getInOrder", scope: !1, file: !1, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
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!10 = !DISubroutineType(types: !11)
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!11 = !{!12, !12}
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !{}
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!14 = !DILocation(line: 3, scope: !9)
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!15 = distinct !DISubprogram(name: "getRandVar", scope: !1, file: !1, line: 6, type: !10, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
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!16 = !DILocation(line: 8, scope: !15)
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!17 = distinct !DISubprogram(name: "bounce", scope: !1, file: !1, line: 11, type: !18, scopeLine: 11, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!12}
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!20 = !DILocation(line: 14, scope: !17)
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!21 = !DILocation(line: 15, scope: !17)
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!22 = !DILocation(line: 16, scope: !17)
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!23 = !DILocation(line: 17, scope: !17)
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!24 = distinct !{!24, !20, !25, !26}
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!25 = !DILocation(line: 18, scope: !17)
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!26 = !{!"llvm.loop.mustprogress"}
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!27 = !DILocation(line: 0, scope: !17)
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!28 = !DILocation(line: 19, scope: !17)
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