1 ; RUN: llc %s -start-after=codegenprepare -stop-before=finalize-isel \
2 ; RUN: -experimental-debug-variable-locations=true -o - \
5 ; Test that the given input doesn't crash with instrruction referencing variable
6 ; locations. The use of llvm.read_register allows the IR to access any register
7 ; at any point, which is unfortunate, but a use case that needs to be supported.
9 ; Just examine to see that we read something from $rsp.
10 ; CHECK-LABEL: bb.1.if.then:
11 ; CHECK: DBG_PHI $rsp, 1
12 ; CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
\r
14 source_filename = "tlb-9e7172.c"
15 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
16 target triple = "x86_64-cros-linux-gnu"
18 @c = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
20 ; Function Attrs: noredzone nounwind null_pointer_is_valid optsize sspstrong
21 define dso_local void @switch_mm_irqs_off() local_unnamed_addr #0 !dbg !16 {
23 %0 = load i32, ptr @c, align 4, !dbg !24
24 %tobool.not = icmp eq i32 %0, 0, !dbg !24
25 br i1 %tobool.not, label %if.end, label %if.then, !dbg !25
27 if.then: ; preds = %entry
28 call void @llvm.dbg.value(metadata i64 0, metadata !20, metadata !DIExpression()), !dbg !26
29 %1 = tail call i64 @llvm.read_register.i64(metadata !7), !dbg !27
30 call void @llvm.dbg.value(metadata i64 %1, metadata !20, metadata !DIExpression()), !dbg !26
31 %call = tail call i32 @b(i64 noundef %1) #4, !dbg !28
34 if.end: ; preds = %entry
38 ; Function Attrs: nofree nounwind readonly
39 declare i64 @llvm.read_register.i64(metadata) #1
41 ; Function Attrs: noredzone null_pointer_is_valid optsize
42 declare !dbg !30 dso_local i32 @b(i64 noundef) local_unnamed_addr #2
44 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
45 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
48 !llvm.named.register.rsp = !{!7}
49 !llvm.module.flags = !{!8, !9, !10, !11, !12, !13, !14}
52 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
53 !1 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !5, line: 2, type: !6, isLocal: false, isDefinition: true)
54 !2 = distinct !DICompileUnit(language: DW_LANG_C89, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)
55 !3 = !DIFile(filename: "tlb.c", directory: ".")
57 !5 = !DIFile(filename: "tlb-9e7172.c", directory: ".")
58 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
60 !8 = !{i32 7, !"Dwarf Version", i32 4}
61 !9 = !{i32 2, !"Debug Info Version", i32 3}
62 !10 = !{i32 1, !"wchar_size", i32 2}
63 !11 = !{i32 1, !"Code Model", i32 2}
64 !12 = !{i32 7, !"frame-pointer", i32 2}
65 !13 = !{i32 1, !"override-stack-alignment", i32 8}
66 !14 = !{i32 4, !"SkipRaxSetup", i32 1}
67 !15 = !{!"clang version 15.0.0 (git@github.com:llvm/llvm-project ab49dce01f211fd80f76f449035d771f5e2720b9)"}
68 !16 = distinct !DISubprogram(name: "switch_mm_irqs_off", scope: !5, file: !5, line: 4, type: !17, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)
69 !17 = !DISubroutineType(types: !18)
72 !20 = !DILocalVariable(name: "d", scope: !21, file: !5, line: 6, type: !23)
73 !21 = distinct !DILexicalBlock(scope: !22, file: !5, line: 5, column: 10)
74 !22 = distinct !DILexicalBlock(scope: !16, file: !5, line: 5, column: 7)
75 !23 = !DIBasicType(name: "long", size: 64, encoding: DW_ATE_signed)
76 !24 = !DILocation(line: 5, column: 7, scope: !22)
77 !25 = !DILocation(line: 5, column: 7, scope: !16)
78 !26 = !DILocation(line: 0, scope: !21)
79 !27 = !DILocation(line: 6, column: 14, scope: !21)
80 !28 = !DILocation(line: 7, column: 5, scope: !21)
81 !29 = !DILocation(line: 9, column: 1, scope: !16)
82 !30 = !DISubprogram(name: "b", scope: !5, file: !5, line: 3, type: !31, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !33)
83 !31 = !DISubroutineType(types: !32)