| ; RUN: opt < %s -S -simplifycfg | FileCheck %s |
| |
| ; Note: This patch fixes the regression introduced by pr38762. |
| ; |
| ; When SimplifyCFG changes the PHI node into a select instruction, the debug |
| ; information becomes ambiguous. It causes the debugger to display unreached |
| ; lines and invalid variable values. |
| ; |
| ; When the function 'hoistAllInstructionsInto' hoist a basic block: |
| ; - Remove their dbg.values. |
| ; - Set their debug locations to the values from the insertion point. |
| ; |
| ; But, if one of the instructions being hoisted is a debug intrinsic from an |
| ; inlined function, assigning it the debug location from the insertion point |
| ; will create a mismatch between the intrinsic's subprogram and the location's |
| ; subprogram, causing the assertion "Expected inlined-at fields to agree" in |
| ; SelectionDAG". |
| |
| ; IR generated with: |
| ; clang -S -g -gno-column-info -O2 -emit-llvm pr39243.cpp -o pr39243.ll -mllvm -opt-bisect-limit=103 |
| |
| ; // pr39243.cpp |
| ; union onion { |
| ; double dd; |
| ; int ii[2]; |
| ; }; |
| ; |
| ; int alpha; |
| ; int bravo(); |
| ; |
| ; int charlie() { |
| ; int delta = 0; |
| ; return bravo(); |
| ; } |
| ; |
| ; int echo(onion foxtrot) { |
| ; alpha = foxtrot.ii[0]; |
| ; if (alpha) { |
| ; int golf = bravo(); |
| ; return -golf; |
| ; } |
| ; alpha = foxtrot.ii[1]; |
| ; return -charlie(); |
| ; } |
| |
| ; Change the debug locations associated with the PHI nodes being promoted, to |
| ; the debug locations from the insertion point in the dominant block. |
| |
| ; CHECK-LABEL: entry |
| ; CHECK: %foxtrot.sroa.0.0.extract.trunc = trunc i64 %foxtrot.coerce to i32 |
| ; CHECK: %tobool = icmp eq i32 %foxtrot.sroa.0.0.extract.trunc, 0 |
| ; CHECK: %foxtrot.sroa.2.0.extract.shift = lshr i64 %foxtrot.coerce, 32 |
| ; 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 |
| ; CHECK: %foxtrot.sroa.2.0.extract.trunc = trunc i64 %foxtrot.sroa.2.0.extract.shift to i32 |
| ; CHECK: store i32 %foxtrot.sroa.2.0.extract.trunc, ptr @alpha, align 4, !dbg !25 |
| ; CHECK-NOT: call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !43 |
| |
| ; ModuleID = 'pr39243.cpp' |
| source_filename = "pr39243.cpp" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-linux-gnu" |
| |
| @alpha = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0 |
| |
| define dso_local i32 @_Z7charliev() local_unnamed_addr #0 { |
| entry: |
| %call = tail call i32 @_Z5bravov() |
| ret i32 %call |
| } |
| |
| declare dso_local i32 @_Z5bravov() local_unnamed_addr #1 |
| |
| define dso_local i32 @_Z4echo5onion(i64 %foxtrot.coerce) local_unnamed_addr #0 !dbg !18 { |
| entry: |
| %foxtrot.sroa.0.0.extract.trunc = trunc i64 %foxtrot.coerce to i32 |
| store i32 %foxtrot.sroa.0.0.extract.trunc, ptr @alpha, align 4 |
| %tobool = icmp eq i32 %foxtrot.sroa.0.0.extract.trunc, 0 |
| br i1 %tobool, label %if.end, label %return |
| |
| if.end: ; preds = %entry |
| %foxtrot.sroa.2.0.extract.shift = lshr i64 %foxtrot.coerce, 32 |
| %foxtrot.sroa.2.0.extract.trunc = trunc i64 %foxtrot.sroa.2.0.extract.shift to i32 |
| 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 |
| store i32 %foxtrot.sroa.2.0.extract.trunc, ptr @alpha, align 4, !dbg !42 |
| call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !43 |
| br label %return |
| |
| return: ; preds = %entry, %if.end |
| %call.i = tail call i32 @_Z5bravov() |
| %retval.0 = sub nsw i32 0, %call.i |
| ret i32 %retval.0 |
| } |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!7, !8, !9} |
| !llvm.ident = !{!10} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "alpha", scope: !2, file: !3, line: 6, type: !6, isLocal: false, isDefinition: true) |
| !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) |
| !3 = !DIFile(filename: "pr39243.cpp", directory: ".") |
| !4 = !{} |
| !5 = !{!0} |
| !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !7 = !{i32 2, !"Dwarf Version", i32 4} |
| !8 = !{i32 2, !"Debug Info Version", i32 3} |
| !9 = !{i32 1, !"wchar_size", i32 4} |
| !10 = !{!"clang version 8.0.0 (trunk 344502)"} |
| !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) |
| !12 = !DISubroutineType(types: !13) |
| !13 = !{!6} |
| !14 = !{!15} |
| !15 = !DILocalVariable(name: "delta", scope: !11, file: !3, line: 10, type: !6) |
| !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) |
| !19 = !DISubroutineType(types: !20) |
| !20 = !{!6, !21} |
| !21 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "onion", file: !3, line: 1, size: 64, flags: DIFlagTypePassByValue, elements: !22, identifier: "_ZTS5onion") |
| !22 = !{!23, !25} |
| !23 = !DIDerivedType(tag: DW_TAG_member, name: "dd", scope: !21, file: !3, line: 2, baseType: !24, size: 64) |
| !24 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float) |
| !25 = !DIDerivedType(tag: DW_TAG_member, name: "ii", scope: !21, file: !3, line: 3, baseType: !26, size: 64) |
| !26 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 64, elements: !27) |
| !27 = !{!28} |
| !28 = !DISubrange(count: 2) |
| !29 = !{!30} |
| !30 = !DILocalVariable(name: "foxtrot", arg: 1, scope: !18, file: !3, line: 14, type: !21) |
| !34 = !DILocation(line: 14, scope: !18) |
| !42 = !DILocation(line: 20, scope: !18) |
| !43 = !DILocation(line: 10, scope: !11, inlinedAt: !44) |
| !44 = distinct !DILocation(line: 21, scope: !18) |