91 lines
3.7 KiB
LLVM
91 lines
3.7 KiB
LLVM
; RUN: llc < %s -tail-dup-placement-threshold=4 | FileCheck %s
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; Based on test case from PR43695:
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; __declspec(allocator) void *alloc(unsigned int size);
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; void f2();
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; void f1(unsigned int *size_ptr) {
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; void *hg = alloc(size_ptr ? *size_ptr : 1UL);
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; f2();
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; }
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; In this case, block placement duplicates the heap allocation site.
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; ModuleID = 't.cpp'
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source_filename = "t.cpp"
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target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.22.27905"
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define dso_local void @taildupit(i32* readonly %size_ptr) !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i32* %size_ptr, metadata !14, metadata !DIExpression()), !dbg !17
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%tobool = icmp eq i32* %size_ptr, null, !dbg !18
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br i1 %tobool, label %cond.end, label %cond.true, !dbg !18
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cond.true: ; preds = %entry
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%0 = load i32, i32* %size_ptr, align 4, !dbg !18, !tbaa !19
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br label %cond.end, !dbg !18
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cond.end: ; preds = %entry, %cond.true
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%cond = phi i32 [ %0, %cond.true ], [ 1, %entry ], !dbg !18
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%call = tail call i8* @alloc(i32 %cond), !dbg !18, !heapallocsite !2
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call void @llvm.dbg.value(metadata i8* %call, metadata !15, metadata !DIExpression()), !dbg !17
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tail call void @f2(), !dbg !23
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ret void, !dbg !24
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}
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; CHECK-LABEL: taildupit: # @taildupit
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; CHECK: testq
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; CHECK: je
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; CHECK: callq alloc
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; CHECK-NEXT: [[L1:.Ltmp[0-9]+]]
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; CHECK: jmp f2 # TAILCALL
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; CHECK: callq alloc
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; CHECK-NEXT: [[L3:.Ltmp[0-9]+]]
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; CHECK: jmp f2 # TAILCALL
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; CHECK-LABEL: .short 4423 # Record kind: S_GPROC32_ID
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; CHECK: .short 4446 # Record kind: S_HEAPALLOCSITE
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; CHECK-NEXT: .secrel32 [[L0:.Ltmp[0-9]+]]
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; CHECK-NEXT: .secidx [[L0]]
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; CHECK-NEXT: .short [[L1]]-[[L0]]
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; CHECK-NEXT: .long 3
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; CHECK: .short 4446 # Record kind: S_HEAPALLOCSITE
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; CHECK-NEXT: .secrel32 [[L2:.Ltmp[0-9]+]]
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; CHECK-NEXT: .secidx [[L2]]
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; CHECK-NEXT: .short [[L3]]-[[L2]]
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; CHECK-NEXT: .long 3
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declare dso_local i8* @alloc(i32)
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declare dso_local void @f2()
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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 = !{!3, !4, !5, !6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git 0650355c09ab8e6605ae37b818270a7a7c8ce2c7)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "t.cpp", directory: "C:\\src\\llvm-project\\build", checksumkind: CSK_MD5, checksum: "b227901e92d848fa564190b0762d757c")
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!2 = !{}
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!3 = !{i32 2, !"CodeView", i32 1}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 2}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!8 = distinct !DISubprogram(name: "f1", linkageName: "?f1@@YAXPEAI@Z", scope: !1, file: !1, line: 5, type: !9, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null, !11}
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
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!12 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!13 = !{!14, !15}
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!14 = !DILocalVariable(name: "size_ptr", arg: 1, scope: !8, file: !1, line: 5, type: !11)
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!15 = !DILocalVariable(name: "hg", scope: !8, file: !1, line: 6, type: !16)
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!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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!17 = !DILocation(line: 0, scope: !8)
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!18 = !DILocation(line: 6, scope: !8)
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!19 = !{!20, !20, i64 0}
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!20 = !{!"int", !21, i64 0}
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!21 = !{!"omnipotent char", !22, i64 0}
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!22 = !{!"Simple C++ TBAA"}
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!23 = !DILocation(line: 7, scope: !8)
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!24 = !DILocation(line: 8, scope: !8)
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