1 ; RUN: opt < %s -S -simplifycfg | FileCheck %s
3 ; Note: This patch fixes the regression introduced by pr38762.
5 ; When SimplifyCFG changes the PHI node into a select instruction, the debug
6 ; information becomes ambiguous. It causes the debugger to display unreached
7 ; lines and invalid variable values.
9 ; When the function 'hoistAllInstructionsInto' hoist a basic block:
10 ; - Remove their dbg.values.
11 ; - Set their debug locations to the values from the insertion point.
13 ; But, if one of the instructions being hoisted is a debug intrinsic from an
14 ; inlined function, assigning it the debug location from the insertion point
15 ; will create a mismatch between the intrinsic's subprogram and the location's
16 ; subprogram, causing the assertion "Expected inlined-at fields to agree" in
20 ; clang -S -g -gno-column-info -O2 -emit-llvm pr39243.cpp -o pr39243.ll -mllvm -opt-bisect-limit=103
36 ; int echo(onion foxtrot) {
37 ; alpha = foxtrot.ii[0];
42 ; alpha = foxtrot.ii[1];
46 ; Change the debug locations associated with the PHI nodes being promoted, to
47 ; the debug locations from the insertion point in the dominant block.
50 ; CHECK: %foxtrot.sroa.0.0.extract.trunc = trunc i64 %foxtrot.coerce to i32
51 ; CHECK: %tobool = icmp eq i32 %foxtrot.sroa.0.0.extract.trunc, 0
52 ; CHECK: %foxtrot.sroa.2.0.extract.shift = lshr i64 %foxtrot.coerce, 32
53 ; CHECK-NOT: call void @llvm.dbg.value(metadata i32 %foxtrot.sroa.2.0.extract.trunc, metadata !30, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !34
54 ; CHECK: %foxtrot.sroa.2.0.extract.trunc = trunc i64 %foxtrot.sroa.2.0.extract.shift to i32
55 ; CHECK: store i32 %foxtrot.sroa.2.0.extract.trunc, i32* @alpha, align 4, !dbg !25
56 ; CHECK-NOT: call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !43
58 ; ModuleID = 'pr39243.cpp'
59 source_filename = "pr39243.cpp"
60 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
61 target triple = "x86_64-pc-linux-gnu"
63 @alpha = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
65 define dso_local i32 @_Z7charliev() local_unnamed_addr #0 {
67 %call = tail call i32 @_Z5bravov()
71 declare dso_local i32 @_Z5bravov() local_unnamed_addr #1
73 define dso_local i32 @_Z4echo5onion(i64 %foxtrot.coerce) local_unnamed_addr #0 !dbg !18 {
75 %foxtrot.sroa.0.0.extract.trunc = trunc i64 %foxtrot.coerce to i32
76 store i32 %foxtrot.sroa.0.0.extract.trunc, i32* @alpha, align 4
77 %tobool = icmp eq i32 %foxtrot.sroa.0.0.extract.trunc, 0
78 br i1 %tobool, label %if.end, label %return
80 if.end: ; preds = %entry
81 %foxtrot.sroa.2.0.extract.shift = lshr i64 %foxtrot.coerce, 32
82 %foxtrot.sroa.2.0.extract.trunc = trunc i64 %foxtrot.sroa.2.0.extract.shift to i32
83 call void @llvm.dbg.value(metadata i32 %foxtrot.sroa.2.0.extract.trunc, metadata !30, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !34
84 store i32 %foxtrot.sroa.2.0.extract.trunc, i32* @alpha, align 4, !dbg !42
85 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !43
88 return: ; preds = %entry, %if.end
89 %call.i = tail call i32 @_Z5bravov()
90 %retval.0 = sub nsw i32 0, %call.i
94 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
97 !llvm.module.flags = !{!7, !8, !9}
100 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
101 !1 = distinct !DIGlobalVariable(name: "alpha", scope: !2, file: !3, line: 6, type: !6, isLocal: false, isDefinition: true)
102 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 8.0.0 (trunk 344502)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
103 !3 = !DIFile(filename: "pr39243.cpp", directory: ".")
106 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
107 !7 = !{i32 2, !"Dwarf Version", i32 4}
108 !8 = !{i32 2, !"Debug Info Version", i32 3}
109 !9 = !{i32 1, !"wchar_size", i32 4}
110 !10 = !{!"clang version 8.0.0 (trunk 344502)"}
111 !11 = distinct !DISubprogram(name: "charlie", linkageName: "_Z7charliev", scope: !3, file: !3, line: 9, type: !12, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !14)
112 !12 = !DISubroutineType(types: !13)
115 !15 = !DILocalVariable(name: "delta", scope: !11, file: !3, line: 10, type: !6)
116 !18 = distinct !DISubprogram(name: "echo", linkageName: "_Z4echo5onion", scope: !3, file: !3, line: 14, type: !19, isLocal: false, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !29)
117 !19 = !DISubroutineType(types: !20)
119 !21 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "onion", file: !3, line: 1, size: 64, flags: DIFlagTypePassByValue, elements: !22, identifier: "_ZTS5onion")
121 !23 = !DIDerivedType(tag: DW_TAG_member, name: "dd", scope: !21, file: !3, line: 2, baseType: !24, size: 64)
122 !24 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
123 !25 = !DIDerivedType(tag: DW_TAG_member, name: "ii", scope: !21, file: !3, line: 3, baseType: !26, size: 64)
124 !26 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 64, elements: !27)
126 !28 = !DISubrange(count: 2)
128 !30 = !DILocalVariable(name: "foxtrot", arg: 1, scope: !18, file: !3, line: 14, type: !21)
129 !34 = !DILocation(line: 14, scope: !18)
130 !42 = !DILocation(line: 20, scope: !18)
131 !43 = !DILocation(line: 10, scope: !11, inlinedAt: !44)
132 !44 = distinct !DILocation(line: 21, scope: !18)