1; REQUIRES: aarch64-registered-target 2; RUN: opt < %s -codegenprepare -mtriple=arm64-apple-ios -S | FileCheck %s 3 4@first_ones = external global [65536 x i8] 5 6define i32 @fct19(i64 %arg1) #0 !dbg !6 { 7; CHECK-LABEL: @fct19 8entry: 9 %x.sroa.1.0.extract.shift = lshr i64 %arg1, 16, !dbg !35 10 %x.sroa.1.0.extract.trunc = trunc i64 %x.sroa.1.0.extract.shift to i16, !dbg !36 11 12 %x.sroa.3.0.extract.shift = lshr i64 %arg1, 32, !dbg !37 13 call void @llvm.dbg.value(metadata i64 %x.sroa.3.0.extract.shift, metadata !13, metadata !DIExpression()), !dbg !37 14; CHECK: call void @llvm.dbg.value(metadata i64 %arg1, metadata {{.*}}, metadata !DIExpression(DW_OP_constu, 32, DW_OP_shr, DW_OP_stack_value)), !dbg [[shift2_loc:![0-9]+]] 15 16 %x.sroa.5.0.extract.shift = lshr i64 %arg1, 48, !dbg !38 17 %tobool = icmp eq i64 %x.sroa.5.0.extract.shift, 0, !dbg !39 18 br i1 %tobool, label %if.end, label %if.then, !dbg !40 19 20if.then: ; preds = %entry 21 %arrayidx3 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %x.sroa.5.0.extract.shift, !dbg !41 22 %0 = load i8, i8* %arrayidx3, align 1, !dbg !42 23 %conv = zext i8 %0 to i32, !dbg !43 24 br label %return, !dbg !44 25 26if.end: ; preds = %entry 27; CHECK-LABEL: if.end: 28; CHECK-NEXT: lshr i64 %arg1, 32, !dbg [[shift2_loc]] 29 %x.sroa.3.0.extract.trunc = trunc i64 %x.sroa.3.0.extract.shift to i16, !dbg !45 30 %tobool6 = icmp eq i16 %x.sroa.3.0.extract.trunc, 0, !dbg !46 31 br i1 %tobool6, label %if.end13, label %if.then7, !dbg !47 32 33if.then7: ; preds = %if.end 34 %idxprom10 = and i64 %x.sroa.3.0.extract.shift, 65535, !dbg !48 35 %arrayidx11 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %idxprom10, !dbg !49 36 %1 = load i8, i8* %arrayidx11, align 1, !dbg !50 37 %conv12 = zext i8 %1 to i32, !dbg !51 38 %add = add nsw i32 %conv12, 16, !dbg !52 39 br label %return, !dbg !53 40 41if.end13: ; preds = %if.end 42; CHECK-LABEL: if.end13: 43; CHECK-NEXT: [[shift1:%.*]] = lshr i64 %arg1, 16, !dbg [[shift1_loc:![0-9]+]] 44; CHECK-NEXT: trunc i64 [[shift1]] to i16, !dbg [[trunc1_loc:![0-9]+]] 45 %tobool16 = icmp eq i16 %x.sroa.1.0.extract.trunc, 0, !dbg !54 46 br i1 %tobool16, label %return, label %if.then17, !dbg !55 47 48if.then17: ; preds = %if.end13 49 %idxprom20 = and i64 %x.sroa.1.0.extract.shift, 65535, !dbg !56 50 %arrayidx21 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %idxprom20, !dbg !57 51 %2 = load i8, i8* %arrayidx21, align 1, !dbg !58 52 %conv22 = zext i8 %2 to i32, !dbg !59 53 %add23 = add nsw i32 %conv22, 32, !dbg !60 54 br label %return, !dbg !61 55 56return: ; preds = %if.then17, %if.end13, %if.then7, %if.then 57 %retval.0 = phi i32 [ %conv, %if.then ], [ %add, %if.then7 ], [ %add23, %if.then17 ], [ 64, %if.end13 ], !dbg !62 58 ret i32 %retval.0, !dbg !63 59} 60 61; CodeGenPrepare was erasing the unused lshr instruction, but then further 62; processing the instruction after it was freed. If this bug is still present, 63; this test will always crash in an LLVM built with ASAN enabled, and may 64; crash even if ASAN is not enabled. 65 66define i32 @shift_unused(i32 %a) { 67; CHECK-LABEL: @shift_unused( 68; CHECK-NEXT: BB2: 69; CHECK-NEXT: ret i32 [[A:%.*]] 70; 71 %as = lshr i32 %a, 3 72 br label %BB2 73 74BB2: 75 ret i32 %a 76} 77 78; CHECK: [[shift1_loc]] = !DILocation(line: 1 79; CHECK: [[trunc1_loc]] = !DILocation(line: 2 80; CHECK: [[shift2_loc]] = !DILocation(line: 3 81 82declare void @llvm.dbg.value(metadata, metadata, metadata) #1 83 84attributes #0 = { nounwind readonly ssp } 85attributes #1 = { nounwind readnone speculatable } 86 87!llvm.dbg.cu = !{!0} 88!llvm.module.flags = !{!5} 89 90!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 91!1 = !DIFile(filename: "sink-shift-and-trunc.ll", directory: "/") 92!2 = !{} 93!5 = !{i32 2, !"Debug Info Version", i32 3} 94!6 = distinct !DISubprogram(name: "fct19", linkageName: "fct19", scope: null, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !8) 95!7 = !DISubroutineType(types: !2) 96!8 = !{!13} 97!10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned) 98!13 = !DILocalVariable(name: "3", scope: !6, file: !1, line: 3, type: !10) 99!35 = !DILocation(line: 1, column: 1, scope: !6) 100!36 = !DILocation(line: 2, column: 1, scope: !6) 101!37 = !DILocation(line: 3, column: 1, scope: !6) 102!38 = !DILocation(line: 4, column: 1, scope: !6) 103!39 = !DILocation(line: 5, column: 1, scope: !6) 104!40 = !DILocation(line: 6, column: 1, scope: !6) 105!41 = !DILocation(line: 7, column: 1, scope: !6) 106!42 = !DILocation(line: 8, column: 1, scope: !6) 107!43 = !DILocation(line: 9, column: 1, scope: !6) 108!44 = !DILocation(line: 10, column: 1, scope: !6) 109!45 = !DILocation(line: 11, column: 1, scope: !6) 110!46 = !DILocation(line: 12, column: 1, scope: !6) 111!47 = !DILocation(line: 13, column: 1, scope: !6) 112!48 = !DILocation(line: 14, column: 1, scope: !6) 113!49 = !DILocation(line: 15, column: 1, scope: !6) 114!50 = !DILocation(line: 16, column: 1, scope: !6) 115!51 = !DILocation(line: 17, column: 1, scope: !6) 116!52 = !DILocation(line: 18, column: 1, scope: !6) 117!53 = !DILocation(line: 19, column: 1, scope: !6) 118!54 = !DILocation(line: 20, column: 1, scope: !6) 119!55 = !DILocation(line: 21, column: 1, scope: !6) 120!56 = !DILocation(line: 22, column: 1, scope: !6) 121!57 = !DILocation(line: 23, column: 1, scope: !6) 122!58 = !DILocation(line: 24, column: 1, scope: !6) 123!59 = !DILocation(line: 25, column: 1, scope: !6) 124!60 = !DILocation(line: 26, column: 1, scope: !6) 125!61 = !DILocation(line: 27, column: 1, scope: !6) 126!62 = !DILocation(line: 28, column: 1, scope: !6) 127!63 = !DILocation(line: 29, column: 1, scope: !6) 128