d3a6a90ae5
This is the final patch for DPVAssign support, implementing the actual creation of DPVAssigns and allowing them to be converted along with dbg.values and dbg.declares. Numerous tests landed in previous patches will no longer be rotten after this patch lands (previously they would trivially pass due to DPVAssigns not actually being used), and a further batch of tests have been added here that require the changes in this patch before they pass.
63 lines
2.8 KiB
LLVM
63 lines
2.8 KiB
LLVM
; RUN: opt -S %s -passes=declare-to-assign -o - | FileCheck %s
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; RUN: opt --try-experimental-debuginfo-iterators -S %s -passes=declare-to-assign -o - | FileCheck %s
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;; Check declare-to-assign ignores VLA-backed variables (for now).
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;; From C++ source:
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;; __attribute__ ((nodebug)) int sz;
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;; void fun() {
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;; int x[sz];
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;; }
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; CHECK: llvm.dbg.declare(metadata ptr %vla, metadata ![[#]], metadata !DIExpression())
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@sz = dso_local global i32 0, align 4
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define dso_local void @_Z3funv() #0 !dbg !10 {
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entry:
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%saved_stack = alloca ptr, align 8
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%__vla_expr0 = alloca i64, align 8
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%0 = load i32, ptr @sz, align 4, !dbg !14
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%1 = zext i32 %0 to i64, !dbg !15
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%2 = call ptr @llvm.stacksave(), !dbg !15
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store ptr %2, ptr %saved_stack, align 8, !dbg !15
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%vla = alloca i32, i64 %1, align 16, !dbg !15
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store i64 %1, ptr %__vla_expr0, align 8, !dbg !15
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;; Ignore this artificial variable for the purpose of the test.
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; call void @llvm.dbg.declare(metadata ptr %__vla_expr0, metadata !16, metadata !DIExpression()), !dbg !18
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call void @llvm.dbg.declare(metadata ptr %vla, metadata !19, metadata !DIExpression()), !dbg !24
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%3 = load ptr, ptr %saved_stack, align 8, !dbg !25
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call void @llvm.stackrestore(ptr %3), !dbg !25
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ret void, !dbg !25
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}
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declare ptr @llvm.stacksave() #1
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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declare void @llvm.stackrestore(ptr) #1
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!llvm.ident = !{!9}
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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: 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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!8 = !{i32 7, !"frame-pointer", i32 2}
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!9 = !{!"clang version 17.0.0"}
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!10 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !1, file: !1, line: 2, type: !11, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
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!11 = !DISubroutineType(types: !12)
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!12 = !{null}
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!13 = !{}
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!14 = !DILocation(line: 3, column: 9, scope: !10)
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!15 = !DILocation(line: 3, column: 3, scope: !10)
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!16 = !DILocalVariable(name: "__vla_expr0", scope: !10, type: !17, flags: DIFlagArtificial)
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!17 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned)
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!18 = !DILocation(line: 0, scope: !10)
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!19 = !DILocalVariable(name: "x", scope: !10, file: !1, line: 3, type: !20)
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!20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, elements: !22)
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!21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!22 = !{!23}
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!23 = !DISubrange(count: !16)
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!24 = !DILocation(line: 3, column: 7, scope: !10)
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!25 = !DILocation(line: 4, column: 1, scope: !10)
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