| ; RUN: opt -passes=instcombine %s -o - -S | FileCheck %s |
| ; typedef struct v *v_t; |
| ; struct v { |
| ; unsigned long long p; |
| ; }; |
| ; |
| ; void f(v_t object, unsigned long long *start) { |
| ; unsigned head_size; |
| ; unsigned long long orig_start; |
| ; unsigned long long offset; |
| ; orig_start = *start; |
| ; for (offset = orig_start - (unsigned long long)(1 << 12); head_size; |
| ; offset -= (unsigned long long)(1 << 12), head_size -= (1 << 12)) |
| ; use(offset, (object)); |
| ; } |
| source_filename = "test.i" |
| target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32" |
| target triple = "thumbv7s-apple-ios5.0.0" |
| |
| %struct.vm_object = type { i64 } |
| |
| ; Function Attrs: nounwind ssp |
| define void @f(ptr %object, ptr nocapture readonly %start, i1 %c1) local_unnamed_addr #0 !dbg !11 { |
| entry: |
| tail call void @llvm.dbg.value(metadata ptr %object, metadata !21, metadata !DIExpression()), !dbg !27 |
| tail call void @llvm.dbg.value(metadata ptr %start, metadata !22, metadata !DIExpression()), !dbg !28 |
| %0 = load i64, ptr %start, align 4, !dbg !29 |
| tail call void @llvm.dbg.value(metadata i64 %0, metadata !25, metadata !DIExpression()), !dbg !30 |
| %offset.08 = add i64 %0, -4096 |
| tail call void @llvm.dbg.value(metadata i64 %offset.08, metadata !26, metadata !DIExpression()), !dbg !31 |
| tail call void @llvm.dbg.value(metadata i32 undef, metadata !23, metadata !DIExpression()), !dbg !32 |
| br i1 %c1, label %for.end, label %for.body.lr.ph, !dbg !32 |
| |
| for.body.lr.ph: ; preds = %entry |
| ; The 'load' and the 'add' are sunken to this basic block. So let's verify that the related dbg.values are sunken as well. |
| ; The add is later eliminated, so we verify that the dbg.value is salvaged by using DW_OP_minus. |
| ; CHECK-LABEL: for.body.lr.ph: |
| ; CHECK-NEXT: %0 = load |
| ; CHECK-NEXT: call void @llvm.dbg.value(metadata i64 %0, metadata !25, metadata !DIExpression()), !dbg ! |
| ; CHECK-NEXT: call void @llvm.dbg.value(metadata i64 %0, metadata !26, metadata !DIExpression(DW_OP_constu, 4096, DW_OP_minus, DW_OP_stack_value)), !dbg ! |
| br label %for.body, !dbg !32 |
| |
| for.body: ; preds = %for.body.lr.ph, %for.body |
| ; CHECK-LABEL: for.body: |
| %offset.010 = phi i64 [ %offset.08, %for.body.lr.ph ], [ %offset.0, %for.body ] |
| %head_size.09 = phi i32 [ poison, %for.body.lr.ph ], [ %sub2, %for.body ] |
| tail call void @llvm.dbg.value(metadata i32 %head_size.09, metadata !23, metadata !DIExpression()), !dbg !31 |
| %call = tail call i32 @use(i64 %offset.010, ptr %object) #3, !dbg !34 |
| %sub2 = add i32 %head_size.09, -4096, !dbg !37 |
| %offset.0 = add i64 %offset.010, -4096 |
| tail call void @llvm.dbg.value(metadata i64 %offset.0, metadata !26, metadata !DIExpression()), !dbg !30 |
| ; CHECK: call void @llvm.dbg.value(metadata i64 %offset.010, metadata !26, metadata !DIExpression(DW_OP_constu, 4096, DW_OP_minus, DW_OP_stack_value)), !dbg ! |
| tail call void @llvm.dbg.value(metadata i32 %sub2, metadata !23, metadata !DIExpression()), !dbg !31 |
| %tobool = icmp eq i32 %sub2, 0, !dbg !32 |
| br i1 %tobool, label %for.end, label %for.body, !dbg !32, !llvm.loop !38 |
| |
| for.end: ; preds = %for.body, %entry |
| ret void, !dbg !40 |
| } |
| |
| declare i32 @use(...) local_unnamed_addr |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind ssp } |
| attributes #2 = { nounwind readnone speculatable } |
| attributes #3 = { nobuiltin } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!5, !6, !7, !8, !9} |
| !llvm.ident = !{!10} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 (trunk 317434) (llvm/trunk 317437)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3) |
| !1 = !DIFile(filename: "test.i", directory: "/Data/radar/31209283") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned) |
| !5 = !{i32 2, !"Dwarf Version", i32 2} |
| !6 = !{i32 2, !"Debug Info Version", i32 3} |
| !7 = !{i32 1, !"wchar_size", i32 4} |
| !8 = !{i32 1, !"min_enum_size", i32 4} |
| !9 = !{i32 7, !"PIC Level", i32 2} |
| !10 = !{!"clang version 6.0.0 (trunk 317434) (llvm/trunk 317437)"} |
| !11 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 6, type: !12, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !20) |
| !12 = !DISubroutineType(types: !13) |
| !13 = !{null, !14, !19} |
| !14 = !DIDerivedType(tag: DW_TAG_typedef, name: "v_t", file: !1, line: 1, baseType: !15) |
| !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32) |
| !16 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v", file: !1, line: 2, size: 64, elements: !17) |
| !17 = !{!18} |
| !18 = !DIDerivedType(tag: DW_TAG_member, name: "p", scope: !16, file: !1, line: 3, baseType: !4, size: 64) |
| !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 32) |
| !20 = !{!21, !22, !23, !25, !26} |
| !21 = !DILocalVariable(name: "object", arg: 1, scope: !11, file: !1, line: 6, type: !14) |
| !22 = !DILocalVariable(name: "start", arg: 2, scope: !11, file: !1, line: 6, type: !19) |
| !23 = !DILocalVariable(name: "head_size", scope: !11, file: !1, line: 7, type: !24) |
| !24 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) |
| !25 = !DILocalVariable(name: "orig_start", scope: !11, file: !1, line: 8, type: !4) |
| !26 = !DILocalVariable(name: "offset", scope: !11, file: !1, line: 9, type: !4) |
| !27 = !DILocation(line: 6, column: 20, scope: !11) |
| !28 = !DILocation(line: 6, column: 48, scope: !11) |
| !29 = !DILocation(line: 8, column: 22, scope: !11) |
| !30 = !DILocation(line: 7, column: 12, scope: !11) |
| !31 = !DILocation(line: 10, column: 16, scope: !11) |
| !32 = !DILocation(line: 11, column: 5, scope: !33) |
| !33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 11, column: 5) |
| !34 = !DILocation(line: 13, column: 7, scope: !35) |
| !35 = distinct !DILexicalBlock(scope: !36, file: !1, line: 12, column: 75) |
| !36 = distinct !DILexicalBlock(scope: !33, file: !1, line: 11, column: 5) |
| !37 = !DILocation(line: 12, column: 61, scope: !36) |
| !38 = distinct !{!38, !32, !39} |
| !39 = !DILocation(line: 14, column: 3, scope: !33) |
| !40 = !DILocation(line: 15, column: 1, scope: !11) |