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f1e4168f92
D85085 was pushed earlier but broke tests on mac and win: http://lab.llvm.org:8080/green/job/clang-stage1-RA/21182/consoleFull#-706149783d489585b-5106-414a-ac11-3ff90657619c Recommitting it after adding mtriple to the llc commands. Emit correct location lists with basic block sections. This patch addresses multiple things: 1) It ensures that const_value is emitted when possible with basic block sections. 2) It emits location lists such that the labels are always within the section boundary. 3) It fixes a bug when the parameter is first used in a non-entry block which is in a different section from the entry block. Differential Revision: https://reviews.llvm.org/D85085
99 lines
4.7 KiB
LLVM
99 lines
4.7 KiB
LLVM
; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=none -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
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; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=all -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s --check-prefix=CHECK --check-prefix=SECTIONS
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; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=none -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
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; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=all -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s --check-prefix=CHECK --check-prefix=SECTIONS
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location
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; CHECK-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
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; SECTIONS-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
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; SECTIONS-NEXT: [0x{{[0-9a-f]+}}, 0x{{[0-9a-f]+}}): DW_OP_consts +7, DW_OP_stack_value
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; CHECK-NEXT: DW_AT_name ("i")
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; In the test below, i's constant value of 7 is only valid partially as
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; it is redefined at the end. This forces the use of a loclist with basic
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; block sections. Without basic block sections, a single entry location
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; list would be used to mark the entire scope in which value of i is 7.
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; Source to generate the IR below:
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; void f1();
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; int f2();
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; extern bool b;
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; extern int x;
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; void test() {
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; int i = 7;
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; f1();
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; if (b)
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; f1();
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; i = f2();
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; f1();
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; }
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;
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; $ clang++ -S -emit-llvm -g -O2 loclist_4.cc
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@b = external dso_local local_unnamed_addr global i8, align 1
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define dso_local void @_Z4testv() local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 7, metadata !11, metadata !DIExpression()), !dbg !13
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tail call void @_Z2f1v(), !dbg !14
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%0 = load i8, i8* @b, align 1, !dbg !15, !tbaa !17, !range !21
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%tobool.not = icmp eq i8 %0, 0, !dbg !15
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br i1 %tobool.not, label %if.end, label %if.then, !dbg !22
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if.then: ; preds = %entry
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tail call void @_Z2f1v(), !dbg !23
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br label %if.end, !dbg !23
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if.end: ; preds = %if.then, %entry
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%call = tail call i32 @_Z2f2v(), !dbg !24
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call void @llvm.dbg.value(metadata i32 %call, metadata !11, metadata !DIExpression()), !dbg !13
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tail call void @_Z2f1v(), !dbg !25
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ret void, !dbg !26
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}
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declare !dbg !27 dso_local void @_Z2f1v() local_unnamed_addr
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declare !dbg !28 dso_local i32 @_Z2f2v() local_unnamed_addr
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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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}
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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 13.0.0 (git@github.com:llvm/llvm-project.git 593cb4655097552ac6d81ce18a2851ae0feb8d3c)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "loclist_5.cc", directory: "/code")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 13.0.0 (git@github.com:llvm/llvm-project.git 593cb4655097552ac6d81ce18a2851ae0feb8d3c)"}
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!7 = distinct !DISubprogram(name: "test", linkageName: "_Z4testv", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !{!11}
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!11 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 9, type: !12)
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocation(line: 10, column: 3, scope: !7)
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!15 = !DILocation(line: 11, column: 7, scope: !16)
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!16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 7)
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!17 = !{!18, !18, i64 0}
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!18 = !{!"bool", !19, i64 0}
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!19 = !{!"omnipotent char", !20, i64 0}
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!20 = !{!"Simple C++ TBAA"}
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!21 = !{i8 0, i8 2}
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!22 = !DILocation(line: 11, column: 7, scope: !7)
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!23 = !DILocation(line: 12, column: 5, scope: !16)
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!24 = !DILocation(line: 13, column: 7, scope: !7)
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!25 = !DILocation(line: 14, column: 3, scope: !7)
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!26 = !DILocation(line: 15, column: 1, scope: !7)
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!27 = !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!28 = !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !29, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!29 = !DISubroutineType(types: !30)
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!30 = !{!12}
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