32a4566fbb
The two debuginfo tests go away because the relevant transforms no longer occur in this form, e.g. the "cast of alloca" transform just doesn't exist with opaque pointers.
140 lines
6.8 KiB
LLVM
140 lines
6.8 KiB
LLVM
; RUN: opt -passes=instcombine %s -S -o - | FileCheck %s
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; Verify that the eliminated instructions (bitcast, gep, load) are salvaged into
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; a DIExpression.
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;
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; Originally created from the following C source and then heavily isolated/reduced.
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;
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; struct entry {
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; struct entry *next;
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; };
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; void scan(struct entry *queue, struct entry *end)
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; {
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; struct entry *entry;
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; for (entry = (struct entry *)((char *)(queue->next) - 8);
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; &entry->next == end;
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; entry = (struct entry *)((char *)(entry->next) - 8)) {
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; }
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; }
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; ModuleID = '<stdin>'
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source_filename = "test.c"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.12.0"
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%struct.entry = type { ptr }
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; This salvage can't currently occur safely (PR40628), however if/when that's
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; ever fixed, then this is definitely a piece of test coverage that should
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; be maintained.
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define void @salvage_load(ptr %queue) local_unnamed_addr #0 !dbg !14 {
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entry:
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%im_not_dead = alloca ptr
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%0 = load ptr, ptr %queue, align 8, !dbg !19
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%1 = load ptr, ptr %queue, align 8, !dbg !19
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call void @llvm.dbg.value(metadata ptr %1, metadata !18, metadata !20), !dbg !19
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; CHECK: define void @salvage_load
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr poison
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store ptr %1, ptr %im_not_dead, align 8
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ret void, !dbg !21
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}
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define void @salvage_bitcast(ptr %queue) local_unnamed_addr #0 !dbg !22 {
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entry:
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%im_not_dead = alloca ptr
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call void @llvm.dbg.value(metadata ptr %queue, metadata !24, metadata !20), !dbg !23
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; CHECK: define void @salvage_bitcast
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr %queue,
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; CHECK-SAME: metadata !DIExpression(DW_OP_plus_uconst, 0))
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store ptr %queue, ptr %im_not_dead, align 8
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ret void, !dbg !23
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}
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define void @salvage_gep0(ptr %queue, ptr %end) local_unnamed_addr #0 !dbg !25 {
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entry:
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%im_not_dead = alloca ptr
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%0 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !26
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%1 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !26
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call void @llvm.dbg.value(metadata ptr %1, metadata !27, metadata !20), !dbg !26
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; CHECK: define void @salvage_gep0
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr %queue,
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; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 0, DW_OP_stack_value))
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store ptr %1, ptr %im_not_dead, align 8
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ret void, !dbg !26
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}
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define void @salvage_gep1(ptr %queue, ptr %end) local_unnamed_addr #0 !dbg !28 {
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entry:
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%im_not_dead = alloca ptr
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%0 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !29
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%1 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !29
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call void @llvm.dbg.value(metadata ptr %1, metadata !30, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !29
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; CHECK: define void @salvage_gep1
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr %queue,
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; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32))
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store ptr %1, ptr %im_not_dead, align 8
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ret void, !dbg !29
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}
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define void @salvage_gep2(ptr %queue, ptr %end) local_unnamed_addr #0 !dbg !31 {
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entry:
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%im_not_dead = alloca ptr
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%0 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !32
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%1 = getelementptr inbounds %struct.entry, ptr %queue, i32 -1, i32 0, !dbg !32
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call void @llvm.dbg.value(metadata ptr %1, metadata !33, metadata !DIExpression(DW_OP_stack_value)), !dbg !32
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; CHECK: define void @salvage_gep2
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr %queue,
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; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value))
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store ptr %1, ptr %im_not_dead, align 8
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ret void, !dbg !32
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!10, !11, !12}
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!llvm.ident = !{!13}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (trunk 297628) (llvm/trunk 297643)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
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!1 = !DIFile(filename: "test.c", directory: "/")
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!2 = !{}
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!3 = !{!4, !8}
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!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
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!5 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "entry", file: !1, line: 1, size: 64, elements: !6)
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!6 = !{!7}
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "next", scope: !5, file: !1, line: 2, baseType: !4, size: 64)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
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!9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!10 = !{i32 2, !"Dwarf Version", i32 4}
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!11 = !{i32 2, !"Debug Info Version", i32 3}
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!12 = !{i32 1, !"PIC Level", i32 2}
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!13 = !{!"clang version 5.0.0 (trunk 297628) (llvm/trunk 297643)"}
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!14 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null, !4, !4}
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!17 = !{!18}
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!18 = !DILocalVariable(name: "entry", scope: !14, file: !1, line: 6, type: !4)
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!19 = !DILocation(line: 6, column: 17, scope: !14)
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!20 = !DIExpression(DW_OP_plus_uconst, 0)
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!21 = !DILocation(line: 11, column: 1, scope: !14)
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!22 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
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!23 = !DILocation(line: 6, column: 17, scope: !22)
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!24 = !DILocalVariable(name: "entry", scope: !22, file: !1, line: 6, type: !4)
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!25 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
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!26 = !DILocation(line: 6, column: 17, scope: !25)
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!27 = !DILocalVariable(name: "entry", scope: !25, file: !1, line: 6, type: !4)
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!28 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
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!29 = !DILocation(line: 6, column: 17, scope: !28)
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!30 = !DILocalVariable(name: "entry", scope: !28, file: !1, line: 6, type: !4)
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!31 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !17)
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!32 = !DILocation(line: 6, column: 17, scope: !31)
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!33 = !DILocalVariable(name: "entry", scope: !31, file: !1, line: 6, type: !4)
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