76 lines
3.5 KiB
LLVM
76 lines
3.5 KiB
LLVM
; RUN: opt -passes=mldst-motion -S %s -o - | FileCheck %s
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;; $ cat test.cpp -n
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;; 1 void fun(int *a, int cond) {
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;; 2 if (cond)
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;; 3 a[1] = 1;
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;; 4 else
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;; 5 a[1] = 2;
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;; 6 }
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;;
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;; mldst-motion will merge and sink the stores in if.then and if.else into
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;; if.end. The resultant PHI, gep and store should be attributed line zero
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;; with the innermost common scope rather than picking a debug location from
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;; one of the original stores.
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; CHECK: if.end:
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; CHECK-NEXT: %.sink = phi i32 [ 2, %if.else ], [ 1, %if.then ], !dbg ![[dbg:[0-9]+]]
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; CHECK-NEXT: %0 = getelementptr inbounds i32, i32* %a, i64 1, !dbg ![[dbg:[0-9]+]]
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; CHECK-NEXT: store i32 %.sink, i32* %0, align 4, !dbg ![[dbg:[0-9]+]]
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; CHECK-DAG: ![[dbg]] = !DILocation(line: 0, scope: ![[scp:[0-9]+]]
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; CHECK-DAG: ![[scp]] = distinct !DILexicalBlock(scope: ![[fun:[0-9]+]]
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; CHECK-DAG: ![[fun]] = distinct !DISubprogram(name: "fun",
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define void @_Z3funPii(i32* nocapture noundef writeonly %a, i32 noundef %cond) !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32* %a, metadata !13, metadata !DIExpression()), !dbg !15
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call void @llvm.dbg.value(metadata i32 %cond, metadata !14, metadata !DIExpression()), !dbg !15
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%tobool.not = icmp eq i32 %cond, 0, !dbg !16
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br i1 %tobool.not, label %if.else, label %if.then, !dbg !18
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if.then: ; preds = %entry
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 1, !dbg !19
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store i32 1, i32* %arrayidx, align 4, !dbg !20
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br label %if.end, !dbg !19
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if.else: ; preds = %entry
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%arrayidx1 = getelementptr inbounds i32, i32* %a, i64 1, !dbg !25
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store i32 2, i32* %arrayidx1, align 4, !dbg !26
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void, !dbg !27
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{!"clang version 14.0.0"}
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!7 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funPii", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10, !11}
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{!13, !14}
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!13 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!14 = !DILocalVariable(name: "cond", arg: 2, scope: !7, file: !1, line: 1, type: !11)
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!15 = !DILocation(line: 0, scope: !7)
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!16 = !DILocation(line: 2, column: 7, scope: !17)
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!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 7)
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!18 = !DILocation(line: 2, column: 7, scope: !7)
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!19 = !DILocation(line: 3, column: 5, scope: !17)
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!20 = !DILocation(line: 3, column: 10, scope: !17)
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!25 = !DILocation(line: 5, column: 5, scope: !17)
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!26 = !DILocation(line: 5, column: 10, scope: !17)
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!27 = !DILocation(line: 6, column: 1, scope: !7)
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