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1; RUN: opt -S -passes=licm %s | FileCheck %s2 3; Check that hoistSub() in LICM salvages the dbg_value for the hoisted sub4; instruction.5 6define i32 @hoist_sub(ptr %p, ptr %x_p, ptr %length_p) !dbg !5 {7; CHECK-LABEL: define i32 @hoist_sub(8; CHECK-LABEL: loop:9; CHECK: #dbg_value(!DIArgList(i32 [[X:%.*]], i32 [[IV:%.*]]), [[META9:![0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_minus, DW_OP_stack_value), [[META16:![0-9]+]])10;11entry:12 %x = load i32, ptr %x_p, align 4, !dbg !20, !range !2113 %length = load i32, ptr %length_p, align 4, !dbg !22, !range !2114 br label %loop, !dbg !2315 16loop: ; preds = %backedge, %entry17 %iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ], !dbg !2418 %arith = sub nsw i32 %x, %iv, !dbg !2519 #dbg_value(i32 %arith, !13, !DIExpression(), !25)20 %x_check = icmp slt i32 %arith, 4, !dbg !2621 br i1 %x_check, label %out_of_bounds, label %backedge, !dbg !2722 23backedge: ; preds = %loop24 %el.ptr = getelementptr i32, ptr %p, i32 %iv, !dbg !2825 store i32 1, ptr %el.ptr, align 4, !dbg !2926 %iv.next = add nuw nsw i32 %iv, 4, !dbg !3027 %loop_cond = icmp slt i32 %iv.next, %length, !dbg !3128 br i1 %loop_cond, label %loop, label %exit, !dbg !3229 30exit: ; preds = %backedge31 ret i32 %iv.next, !dbg !3332 33out_of_bounds: ; preds = %loop34 ret i32 -1, !dbg !3435}36 37!llvm.dbg.cu = !{!0}38!llvm.debugify = !{!2, !3}39!llvm.module.flags = !{!4}40 41!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)42!1 = !DIFile(filename: "salvage-hoisted-sub.ll", directory: "/")43!2 = !{i32 14}44!3 = !{i32 8}45!4 = !{i32 2, !"Debug Info Version", i32 3}46!5 = distinct !DISubprogram(name: "hoist_sub", linkageName: "hoist_sub", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)47!6 = !DISubroutineType(types: !7)48!7 = !{}49!8 = !{!13}50!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)51!13 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 5, type: !10)52!20 = !DILocation(line: 1, column: 1, scope: !5)53!21 = !{i32 0, i32 -2147483648}54!22 = !DILocation(line: 2, column: 1, scope: !5)55!23 = !DILocation(line: 3, column: 1, scope: !5)56!24 = !DILocation(line: 4, column: 1, scope: !5)57!25 = !DILocation(line: 5, column: 1, scope: !5)58!26 = !DILocation(line: 6, column: 1, scope: !5)59!27 = !DILocation(line: 7, column: 1, scope: !5)60!28 = !DILocation(line: 8, column: 1, scope: !5)61!29 = !DILocation(line: 9, column: 1, scope: !5)62!30 = !DILocation(line: 10, column: 1, scope: !5)63!31 = !DILocation(line: 11, column: 1, scope: !5)64!32 = !DILocation(line: 12, column: 1, scope: !5)65!33 = !DILocation(line: 13, column: 1, scope: !5)66!34 = !DILocation(line: 14, column: 1, scope: !5)67;.68; CHECK: [[META9]] = !DILocalVariable(name: "4",69; CHECK: [[META16]] = !DILocation(line: 5, column: 1,70;.71