1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=reassociate -S -o - | FileCheck %s 3 4; After reassociation m1 and m2 aren't calculated as m1=c*a and m2=c*b any longer. 5; So let's verify that the dbg.value nodes for m1 and m3 are invalidated. 6 7source_filename = "reassociate_dbgvalue_discard.c" 8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 9target triple = "x86_64-unknown-linux-gnu" 10 11define dso_local i32 @test1(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 !dbg !7 { 12; CHECK-LABEL: @test1( 13; CHECK-NEXT: entry: 14; CHECK-NEXT: #dbg_value(i32 poison, [[META16:![0-9]+]], !DIExpression(), [[META20:![0-9]+]]) 15; CHECK-NEXT: #dbg_value(i32 poison, [[META17:![0-9]+]], !DIExpression(), [[META21:![0-9]+]]) 16; CHECK-NEXT: [[M1:%.*]] = mul i32 [[D:%.*]], [[C:%.*]], !dbg [[DBG22:![0-9]+]] 17; CHECK-NEXT: [[M3:%.*]] = mul i32 [[M1]], [[A:%.*]], !dbg [[DBG23:![0-9]+]] 18; CHECK-NEXT: #dbg_value(i32 [[M3]], [[META18:![0-9]+]], !DIExpression(), [[META24:![0-9]+]]) 19; CHECK-NEXT: [[M2:%.*]] = mul i32 [[D]], [[C]], !dbg [[DBG25:![0-9]+]] 20; CHECK-NEXT: [[M4:%.*]] = mul i32 [[M2]], [[B:%.*]], !dbg [[DBG26:![0-9]+]] 21; CHECK-NEXT: #dbg_value(i32 [[M4]], [[META19:![0-9]+]], !DIExpression(), [[META27:![0-9]+]]) 22; CHECK-NEXT: [[RES:%.*]] = xor i32 [[M3]], [[M4]] 23; CHECK-NEXT: ret i32 [[RES]], !dbg [[DBG28:![0-9]+]] 24; 25entry: 26 %m1 = mul i32 %c, %a, !dbg !24 27 call void @llvm.dbg.value(metadata i32 %m1, metadata !16, metadata !DIExpression()), !dbg !25 28 %m2 = mul i32 %c, %b, !dbg !26 29 call void @llvm.dbg.value(metadata i32 %m2, metadata !17, metadata !DIExpression()), !dbg !27 30 %m3 = mul i32 %m1, %d, !dbg !28 31 call void @llvm.dbg.value(metadata i32 %m3, metadata !18, metadata !DIExpression()), !dbg !29 32 %m4 = mul i32 %m2, %d, !dbg !30 33 call void @llvm.dbg.value(metadata i32 %m4, metadata !19, metadata !DIExpression()), !dbg !31 34 %res = xor i32 %m3, %m4 35 ret i32 %res, !dbg !32 36} 37 38declare void @llvm.dbg.value(metadata, metadata, metadata) #1 39 40attributes #0 = { nounwind readnone uwtable } 41attributes #1 = { nounwind readnone speculatable } 42 43!llvm.dbg.cu = !{!0} 44!llvm.module.flags = !{!3, !4, !5} 45!llvm.ident = !{!6} 46 47!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 330596) (llvm/trunk 330594)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 48!1 = !DIFile(filename: "reassociate_dbgvalue_discard.c", directory: "") 49!2 = !{} 50!3 = !{i32 2, !"Dwarf Version", i32 4} 51!4 = !{i32 2, !"Debug Info Version", i32 3} 52!5 = !{i32 1, !"wchar_size", i32 4} 53!6 = !{!"clang version 7.0.0 (trunk 330596) (llvm/trunk 330594)"} 54!7 = distinct !DISubprogram(name: "test1", scope: !1, file: !1, line: 3, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) 55!8 = !DISubroutineType(types: !9) 56!9 = !{!10, !10, !10, !10, !10} 57!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 58!11 = !{!12, !13, !14, !15, !16, !17, !18, !19} 59!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 3, type: !10) 60!13 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 3, type: !10) 61!14 = !DILocalVariable(name: "c", arg: 3, scope: !7, file: !1, line: 3, type: !10) 62!15 = !DILocalVariable(name: "d", arg: 4, scope: !7, file: !1, line: 3, type: !10) 63!16 = !DILocalVariable(name: "t1", scope: !7, file: !1, line: 4, type: !10) 64!17 = !DILocalVariable(name: "t2", scope: !7, file: !1, line: 5, type: !10) 65!18 = !DILocalVariable(name: "t3", scope: !7, file: !1, line: 6, type: !10) 66!19 = !DILocalVariable(name: "t4", scope: !7, file: !1, line: 7, type: !10) 67!20 = !DILocation(line: 3, column: 15, scope: !7) 68!21 = !DILocation(line: 3, column: 22, scope: !7) 69!22 = !DILocation(line: 3, column: 29, scope: !7) 70!23 = !DILocation(line: 3, column: 36, scope: !7) 71!24 = !DILocation(line: 4, column: 14, scope: !7) 72!25 = !DILocation(line: 4, column: 7, scope: !7) 73!26 = !DILocation(line: 5, column: 14, scope: !7) 74!27 = !DILocation(line: 5, column: 7, scope: !7) 75!28 = !DILocation(line: 6, column: 15, scope: !7) 76!29 = !DILocation(line: 6, column: 7, scope: !7) 77!30 = !DILocation(line: 7, column: 15, scope: !7) 78!31 = !DILocation(line: 7, column: 7, scope: !7) 79!32 = !DILocation(line: 8, column: 3, scope: !7) 80