derek.holloway
7502bf64a4
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71 lines
3.0 KiB
LLVM
71 lines
3.0 KiB
LLVM
; RUN: opt -S -passes=licm %s | FileCheck %s
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; Check that hoistSub() in LICM salvages the dbg_value for the hoisted sub
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; instruction.
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define i32 @hoist_sub(ptr %p, ptr %x_p, ptr %length_p) !dbg !5 {
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; CHECK-LABEL: define i32 @hoist_sub(
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; CHECK-LABEL: loop:
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; 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]+]])
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;
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entry:
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%x = load i32, ptr %x_p, align 4, !dbg !20, !range !21
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%length = load i32, ptr %length_p, align 4, !dbg !22, !range !21
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br label %loop, !dbg !23
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loop: ; preds = %backedge, %entry
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ], !dbg !24
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%arith = sub nsw i32 %x, %iv, !dbg !25
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#dbg_value(i32 %arith, !13, !DIExpression(), !25)
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%x_check = icmp slt i32 %arith, 4, !dbg !26
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br i1 %x_check, label %out_of_bounds, label %backedge, !dbg !27
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backedge: ; preds = %loop
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%el.ptr = getelementptr i32, ptr %p, i32 %iv, !dbg !28
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store i32 1, ptr %el.ptr, align 4, !dbg !29
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%iv.next = add nuw nsw i32 %iv, 4, !dbg !30
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%loop_cond = icmp slt i32 %iv.next, %length, !dbg !31
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br i1 %loop_cond, label %loop, label %exit, !dbg !32
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exit: ; preds = %backedge
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ret i32 %iv.next, !dbg !33
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out_of_bounds: ; preds = %loop
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ret i32 -1, !dbg !34
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}
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "salvage-hoisted-sub.ll", directory: "/")
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!2 = !{i32 14}
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!3 = !{i32 8}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!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)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !{!13}
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!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
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!13 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 5, type: !10)
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!20 = !DILocation(line: 1, column: 1, scope: !5)
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!21 = !{i32 0, i32 -2147483648}
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!22 = !DILocation(line: 2, column: 1, scope: !5)
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!23 = !DILocation(line: 3, column: 1, scope: !5)
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!24 = !DILocation(line: 4, column: 1, scope: !5)
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!25 = !DILocation(line: 5, column: 1, scope: !5)
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!26 = !DILocation(line: 6, column: 1, scope: !5)
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!27 = !DILocation(line: 7, column: 1, scope: !5)
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!28 = !DILocation(line: 8, column: 1, scope: !5)
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!29 = !DILocation(line: 9, column: 1, scope: !5)
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!30 = !DILocation(line: 10, column: 1, scope: !5)
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!31 = !DILocation(line: 11, column: 1, scope: !5)
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!32 = !DILocation(line: 12, column: 1, scope: !5)
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!33 = !DILocation(line: 13, column: 1, scope: !5)
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!34 = !DILocation(line: 14, column: 1, scope: !5)
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;.
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; CHECK: [[META9]] = !DILocalVariable(name: "4",
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; CHECK: [[META16]] = !DILocation(line: 5, column: 1,
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;.
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