1; REQUIRES: aarch64-registered-target 2; RUN: opt < %s -codegenprepare -mtriple=arm64-apple-ios -S | FileCheck %s 3; RUN: opt < %s -codegenprepare -mtriple=arm64-apple-ios -S --try-experimental-debuginfo-iterators | FileCheck %s 4 5@first_ones = external global [65536 x i8] 6 7define i32 @fct19(i64 %arg1) #0 !dbg !6 { 8; CHECK-LABEL: @fct19 9entry: 10 %x.sroa.1.0.extract.shift = lshr i64 %arg1, 16, !dbg !35 11 %x.sroa.1.0.extract.trunc = trunc i64 %x.sroa.1.0.extract.shift to i16, !dbg !36 12 13 %x.sroa.3.0.extract.shift = lshr i64 %arg1, 32, !dbg !37 14 call void @llvm.dbg.value(metadata i64 %x.sroa.3.0.extract.shift, metadata !13, metadata !DIExpression()), !dbg !37 15; CHECK: #dbg_value(i64 %arg1, {{.*}}, !DIExpression(DW_OP_constu, 32, DW_OP_shr, DW_OP_stack_value), [[shift2_loc:![0-9]+]] 16 17 %x.sroa.5.0.extract.shift = lshr i64 %arg1, 48, !dbg !38 18 %tobool = icmp eq i64 %x.sroa.5.0.extract.shift, 0, !dbg !39 19 br i1 %tobool, label %if.end, label %if.then, !dbg !40 20 21if.then: ; preds = %entry 22 %arrayidx3 = getelementptr inbounds [65536 x i8], ptr @first_ones, i64 0, i64 %x.sroa.5.0.extract.shift, !dbg !41 23 %0 = load i8, ptr %arrayidx3, align 1, !dbg !42 24 %conv = zext i8 %0 to i32, !dbg !43 25 br label %return, !dbg !44 26 27if.end: ; preds = %entry 28; CHECK-LABEL: if.end: 29; CHECK-NEXT: lshr i64 %arg1, 32, !dbg [[shift2_loc]] 30 %x.sroa.3.0.extract.trunc = trunc i64 %x.sroa.3.0.extract.shift to i16, !dbg !45 31 %tobool6 = icmp eq i16 %x.sroa.3.0.extract.trunc, 0, !dbg !46 32 br i1 %tobool6, label %if.end13, label %if.then7, !dbg !47 33 34if.then7: ; preds = %if.end 35 %idxprom10 = and i64 %x.sroa.3.0.extract.shift, 65535, !dbg !48 36 %arrayidx11 = getelementptr inbounds [65536 x i8], ptr @first_ones, i64 0, i64 %idxprom10, !dbg !49 37 %1 = load i8, ptr %arrayidx11, align 1, !dbg !50 38 %conv12 = zext i8 %1 to i32, !dbg !51 39 %add = add nsw i32 %conv12, 16, !dbg !52 40 br label %return, !dbg !53 41 42if.end13: ; preds = %if.end 43; CHECK-LABEL: if.end13: 44; CHECK-NEXT: [[shift1:%.*]] = lshr i64 %arg1, 16, !dbg [[shift1_loc:![0-9]+]] 45; CHECK-NEXT: trunc i64 [[shift1]] to i16, !dbg [[trunc1_loc:![0-9]+]] 46 %tobool16 = icmp eq i16 %x.sroa.1.0.extract.trunc, 0, !dbg !54 47 br i1 %tobool16, label %return, label %if.then17, !dbg !55 48 49if.then17: ; preds = %if.end13 50 %idxprom20 = and i64 %x.sroa.1.0.extract.shift, 65535, !dbg !56 51 %arrayidx21 = getelementptr inbounds [65536 x i8], ptr @first_ones, i64 0, i64 %idxprom20, !dbg !57 52 %2 = load i8, ptr %arrayidx21, align 1, !dbg !58 53 %conv22 = zext i8 %2 to i32, !dbg !59 54 %add23 = add nsw i32 %conv22, 32, !dbg !60 55 br label %return, !dbg !61 56 57return: ; preds = %if.then17, %if.end13, %if.then7, %if.then 58 %retval.0 = phi i32 [ %conv, %if.then ], [ %add, %if.then7 ], [ %add23, %if.then17 ], [ 64, %if.end13 ], !dbg !62 59 ret i32 %retval.0, !dbg !63 60} 61 62; CodeGenPrepare was erasing the unused lshr instruction, but then further 63; processing the instruction after it was freed. If this bug is still present, 64; this test will always crash in an LLVM built with ASAN enabled, and may 65; crash even if ASAN is not enabled. 66 67define i32 @shift_unused(i32 %a) { 68; CHECK-LABEL: @shift_unused( 69; CHECK-NEXT: BB2: 70; CHECK-NEXT: ret i32 [[A:%.*]] 71; 72 %as = lshr i32 %a, 3 73 br label %BB2 74 75BB2: 76 ret i32 %a 77} 78 79; CHECK: [[shift1_loc]] = !DILocation(line: 1 80; CHECK: [[trunc1_loc]] = !DILocation(line: 2 81; CHECK: [[shift2_loc]] = !DILocation(line: 3 82 83declare void @llvm.dbg.value(metadata, metadata, metadata) #1 84 85attributes #0 = { nounwind readonly ssp } 86attributes #1 = { nounwind readnone speculatable } 87 88!llvm.dbg.cu = !{!0} 89!llvm.module.flags = !{!5} 90 91!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 92!1 = !DIFile(filename: "sink-shift-and-trunc.ll", directory: "/") 93!2 = !{} 94!5 = !{i32 2, !"Debug Info Version", i32 3} 95!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) 96!7 = !DISubroutineType(types: !2) 97!8 = !{!13} 98!10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned) 99!13 = !DILocalVariable(name: "3", scope: !6, file: !1, line: 3, type: !10) 100!35 = !DILocation(line: 1, column: 1, scope: !6) 101!36 = !DILocation(line: 2, column: 1, scope: !6) 102!37 = !DILocation(line: 3, column: 1, scope: !6) 103!38 = !DILocation(line: 4, column: 1, scope: !6) 104!39 = !DILocation(line: 5, column: 1, scope: !6) 105!40 = !DILocation(line: 6, column: 1, scope: !6) 106!41 = !DILocation(line: 7, column: 1, scope: !6) 107!42 = !DILocation(line: 8, column: 1, scope: !6) 108!43 = !DILocation(line: 9, column: 1, scope: !6) 109!44 = !DILocation(line: 10, column: 1, scope: !6) 110!45 = !DILocation(line: 11, column: 1, scope: !6) 111!46 = !DILocation(line: 12, column: 1, scope: !6) 112!47 = !DILocation(line: 13, column: 1, scope: !6) 113!48 = !DILocation(line: 14, column: 1, scope: !6) 114!49 = !DILocation(line: 15, column: 1, scope: !6) 115!50 = !DILocation(line: 16, column: 1, scope: !6) 116!51 = !DILocation(line: 17, column: 1, scope: !6) 117!52 = !DILocation(line: 18, column: 1, scope: !6) 118!53 = !DILocation(line: 19, column: 1, scope: !6) 119!54 = !DILocation(line: 20, column: 1, scope: !6) 120!55 = !DILocation(line: 21, column: 1, scope: !6) 121!56 = !DILocation(line: 22, column: 1, scope: !6) 122!57 = !DILocation(line: 23, column: 1, scope: !6) 123!58 = !DILocation(line: 24, column: 1, scope: !6) 124!59 = !DILocation(line: 25, column: 1, scope: !6) 125!60 = !DILocation(line: 26, column: 1, scope: !6) 126!61 = !DILocation(line: 27, column: 1, scope: !6) 127!62 = !DILocation(line: 28, column: 1, scope: !6) 128!63 = !DILocation(line: 29, column: 1, scope: !6) 129