forked from OSchip/llvm-project
142 lines
7.3 KiB
LLVM
142 lines
7.3 KiB
LLVM
; RUN: opt -instcombine %s -S -o - | FileCheck %s
|
|
; Verify that the eliminated instructions (bitcast, gep, load) are salvaged into
|
|
; a DIExpression.
|
|
;
|
|
; Originally created from the following C source and then heavily isolated/reduced.
|
|
;
|
|
; struct entry {
|
|
; struct entry *next;
|
|
; };
|
|
; void scan(struct entry *queue, struct entry *end)
|
|
; {
|
|
; struct entry *entry;
|
|
; for (entry = (struct entry *)((char *)(queue->next) - 8);
|
|
; &entry->next == end;
|
|
; entry = (struct entry *)((char *)(entry->next) - 8)) {
|
|
; }
|
|
; }
|
|
|
|
; ModuleID = '<stdin>'
|
|
source_filename = "test.c"
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macosx10.12.0"
|
|
|
|
%struct.entry = type { %struct.entry* }
|
|
|
|
; This salvage can't currently occur safely (PR40628), however if/when that's
|
|
; ever fixed, then this is definitely a piece of test coverage that should
|
|
; be maintained.
|
|
define void @salvage_load(%struct.entry** %queue) local_unnamed_addr #0 !dbg !14 {
|
|
entry:
|
|
%im_not_dead = alloca %struct.entry*
|
|
%0 = load %struct.entry*, %struct.entry** %queue, align 8, !dbg !19
|
|
%1 = load %struct.entry*, %struct.entry** %queue, align 8, !dbg !19
|
|
call void @llvm.dbg.value(metadata %struct.entry* %1, metadata !18, metadata !20), !dbg !19
|
|
; CHECK: define void @salvage_load
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata %struct.entry* undef
|
|
store %struct.entry* %1, %struct.entry** %im_not_dead, align 8
|
|
ret void, !dbg !21
|
|
}
|
|
|
|
define void @salvage_bitcast(%struct.entry* %queue) local_unnamed_addr #0 !dbg !22 {
|
|
entry:
|
|
%im_not_dead = alloca i8*
|
|
%0 = bitcast %struct.entry* %queue to i8*, !dbg !23
|
|
%1 = bitcast %struct.entry* %queue to i8*, !dbg !23
|
|
call void @llvm.dbg.value(metadata i8* %1, metadata !24, metadata !20), !dbg !23
|
|
; CHECK: define void @salvage_bitcast
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata %struct.entry* %queue,
|
|
; CHECK-SAME: metadata !DIExpression(DW_OP_plus_uconst, 0))
|
|
store i8* %1, i8** %im_not_dead, align 8
|
|
ret void, !dbg !23
|
|
}
|
|
|
|
define void @salvage_gep0(%struct.entry* %queue, %struct.entry* %end) local_unnamed_addr #0 !dbg !25 {
|
|
entry:
|
|
%im_not_dead = alloca %struct.entry**
|
|
%0 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !26
|
|
%1 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !26
|
|
call void @llvm.dbg.value(metadata %struct.entry** %1, metadata !27, metadata !20), !dbg !26
|
|
; CHECK: define void @salvage_gep0
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata %struct.entry* %queue,
|
|
; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 0, DW_OP_stack_value))
|
|
store %struct.entry** %1, %struct.entry*** %im_not_dead, align 8
|
|
ret void, !dbg !26
|
|
}
|
|
|
|
define void @salvage_gep1(%struct.entry* %queue, %struct.entry* %end) local_unnamed_addr #0 !dbg !28 {
|
|
entry:
|
|
%im_not_dead = alloca %struct.entry**
|
|
%0 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !29
|
|
%1 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !29
|
|
call void @llvm.dbg.value(metadata %struct.entry** %1, metadata !30, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !29
|
|
; CHECK: define void @salvage_gep1
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata %struct.entry* %queue,
|
|
; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32))
|
|
store %struct.entry** %1, %struct.entry*** %im_not_dead, align 8
|
|
ret void, !dbg !29
|
|
}
|
|
|
|
define void @salvage_gep2(%struct.entry* %queue, %struct.entry* %end) local_unnamed_addr #0 !dbg !31 {
|
|
entry:
|
|
%im_not_dead = alloca %struct.entry**
|
|
%0 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !32
|
|
%1 = getelementptr inbounds %struct.entry, %struct.entry* %queue, i32 -1, i32 0, !dbg !32
|
|
call void @llvm.dbg.value(metadata %struct.entry** %1, metadata !33, metadata !DIExpression(DW_OP_stack_value)), !dbg !32
|
|
; CHECK: define void @salvage_gep2
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: call void @llvm.dbg.value(metadata %struct.entry* %queue,
|
|
; CHECK-SAME: metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value))
|
|
store %struct.entry** %1, %struct.entry*** %im_not_dead, align 8
|
|
ret void, !dbg !32
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
|
|
|
|
attributes #0 = { nounwind ssp uwtable }
|
|
attributes #1 = { nounwind readnone }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!10, !11, !12}
|
|
!llvm.ident = !{!13}
|
|
|
|
!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)
|
|
!1 = !DIFile(filename: "test.c", directory: "/")
|
|
!2 = !{}
|
|
!3 = !{!4, !8}
|
|
!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
|
|
!5 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "entry", file: !1, line: 1, size: 64, elements: !6)
|
|
!6 = !{!7}
|
|
!7 = !DIDerivedType(tag: DW_TAG_member, name: "next", scope: !5, file: !1, line: 2, baseType: !4, size: 64)
|
|
!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
|
|
!9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
|
|
!10 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!11 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!12 = !{i32 1, !"PIC Level", i32 2}
|
|
!13 = !{!"clang version 5.0.0 (trunk 297628) (llvm/trunk 297643)"}
|
|
!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)
|
|
!15 = !DISubroutineType(types: !16)
|
|
!16 = !{null, !4, !4}
|
|
!17 = !{!18}
|
|
!18 = !DILocalVariable(name: "entry", scope: !14, file: !1, line: 6, type: !4)
|
|
!19 = !DILocation(line: 6, column: 17, scope: !14)
|
|
!20 = !DIExpression(DW_OP_plus_uconst, 0)
|
|
!21 = !DILocation(line: 11, column: 1, scope: !14)
|
|
!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)
|
|
!23 = !DILocation(line: 6, column: 17, scope: !22)
|
|
!24 = !DILocalVariable(name: "entry", scope: !22, file: !1, line: 6, type: !4)
|
|
!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)
|
|
!26 = !DILocation(line: 6, column: 17, scope: !25)
|
|
!27 = !DILocalVariable(name: "entry", scope: !25, file: !1, line: 6, type: !4)
|
|
!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)
|
|
!29 = !DILocation(line: 6, column: 17, scope: !28)
|
|
!30 = !DILocalVariable(name: "entry", scope: !28, file: !1, line: 6, type: !4)
|
|
!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)
|
|
!32 = !DILocation(line: 6, column: 17, scope: !31)
|
|
!33 = !DILocalVariable(name: "entry", scope: !31, file: !1, line: 6, type: !4)
|