632f44e5ed
This patch trivially updates various opt passes to handle DPVAssigns. In all cases, this means some combination of generifying existing code to handle DPValues and DbgAssignIntrinsics, iterating over DPValues where previously we did not, or duplicating code for DbgAssignIntrinsics to the equivalent DPValue function (in inlining and salvageDebugInfo).
183 lines
8.5 KiB
LLVM
183 lines
8.5 KiB
LLVM
; RUN: opt %s -S -passes=licm -o - | FileCheck %s
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; RUN: opt --try-experimental-debuginfo-iterators %s -S -passes=licm -o - | FileCheck %s
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;; $ cat test.c
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;; int b, c, d;
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;; void e();
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;; void f(int *g) { *g = b; }
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;; void i() {
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;; int h, a;
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;; for (;;) {
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;; e();
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;; a = 1;
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;; if (h) {
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;; if (d)
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;; continue;
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;; h = c;
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;; }
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;; f(&a);
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;; }
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;; }
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;; Generated by getting the IR before LICM in:
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;; $ clang -c -O2 -g test.c -fno-unroll-loops -fno-vectorize -fno-inline -Xclang -fexperimental-assignment-tracking -o -
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;; entry
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;; |
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;; v
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;; *---->for.cond.outer
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;; | |
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;; | v
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;; | +->for.cond-----+
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;; | | | |
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;; | | v |
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;; | +--if.then |
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;; | | |
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;; | v v
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;; | if.end if.end3.loopexit
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;; | | |
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;; | v |
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;; +-----if.end3 <----+
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;;
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;; The store in for.cond is sunk into the inner-loop exits if.end and if.end3.loopexit.
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;;
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;; Check that a store sunk into multiple exits retains its (their) dbg.assign,
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;; and that the new stores share the same DIAssignID.
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; CHECK-LABEL: for.cond:
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; CHECK: call void @llvm.dbg.assign(metadata i32 1, metadata ![[var:[0-9]+]], metadata !DIExpression(), metadata ![[id:[0-9]+]], metadata ptr %a, metadata !DIExpression()), !dbg
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; CHECK-LABEL: if.end:
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; CHECK-NEXT: store i32 1, ptr %a, align 1,{{.*}}!DIAssignID ![[id]]
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; CHECK-LABEL: if.end3.loopexit:
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; CHECK-NEXT: store i32 1, ptr %a, align 1,{{.*}}!DIAssignID ![[id]]
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; CHECK-DAG: ![[var]] = !DILocalVariable(name: "a",
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@b = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
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@d = dso_local local_unnamed_addr global i32 0, align 4, !dbg !9
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@c = dso_local local_unnamed_addr global i32 0, align 4, !dbg !6
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define dso_local void @f(ptr nocapture %g) local_unnamed_addr #0 !dbg !15 {
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entry:
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call void @llvm.dbg.assign(metadata i1 undef, metadata !20, metadata !DIExpression(), metadata !21, metadata ptr undef, metadata !DIExpression()), !dbg !22
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call void @llvm.dbg.assign(metadata ptr %g, metadata !20, metadata !DIExpression(), metadata !23, metadata ptr undef, metadata !DIExpression()), !dbg !22
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%0 = load i32, ptr @b, align 4, !dbg !24
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store i32 %0, ptr %g, align 4, !dbg !29
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ret void, !dbg !30
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}
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define dso_local void @i() local_unnamed_addr #2 !dbg !31 {
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entry:
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call void @llvm.dbg.assign(metadata i1 undef, metadata !35, metadata !DIExpression(), metadata !37, metadata ptr undef, metadata !DIExpression()), !dbg !38
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%a = alloca i32, align 4, !DIAssignID !39
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call void @llvm.dbg.assign(metadata i1 undef, metadata !36, metadata !DIExpression(), metadata !39, metadata ptr %a, metadata !DIExpression()), !dbg !38
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call void @llvm.lifetime.start.p0i8(i64 4, ptr nonnull %a) #5, !dbg !40
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br label %for.cond.outer, !dbg !41
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for.cond.outer: ; preds = %if.end3, %entry
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%h.0.ph = phi i32 [ %h.1, %if.end3 ], [ undef, %entry ]
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br label %for.cond, !dbg !42
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for.cond: ; preds = %for.cond.outer, %if.then
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call void @llvm.dbg.value(metadata i32 %h.0.ph, metadata !35, metadata !DIExpression()), !dbg !38
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tail call void (...) @e() #5, !dbg !44
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store i32 1, ptr %a, align 4, !dbg !47, !DIAssignID !48
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call void @llvm.dbg.assign(metadata i32 1, metadata !36, metadata !DIExpression(), metadata !48, metadata ptr %a, metadata !DIExpression()), !dbg !38
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%tobool.not = icmp eq i32 %h.0.ph, 0, !dbg !49
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br i1 %tobool.not, label %if.end3.loopexit, label %if.then, !dbg !51
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if.then: ; preds = %for.cond
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%0 = load i32, ptr @d, align 4, !dbg !52
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%tobool1.not = icmp eq i32 %0, 0, !dbg !52
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br i1 %tobool1.not, label %if.end, label %for.cond, !dbg !55, !llvm.loop !56
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if.end: ; preds = %if.then
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%1 = load i32, ptr @c, align 4, !dbg !59
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call void @llvm.dbg.assign(metadata i32 %1, metadata !35, metadata !DIExpression(), metadata !60, metadata ptr undef, metadata !DIExpression()), !dbg !38
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br label %if.end3, !dbg !61
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if.end3.loopexit: ; preds = %for.cond
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br label %if.end3, !dbg !62
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if.end3: ; preds = %if.end3.loopexit, %if.end
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%h.1 = phi i32 [ %1, %if.end ], [ 0, %if.end3.loopexit ]
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call void @llvm.dbg.value(metadata i32 %h.1, metadata !35, metadata !DIExpression()), !dbg !38
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call void @f(ptr nonnull %a), !dbg !62
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br label %for.cond.outer, !dbg !63, !llvm.loop !56
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}
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #1
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declare void @llvm.lifetime.start.p0i8(i64 immarg, ptr nocapture) #3
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declare !dbg !64 dso_local void @e(...) local_unnamed_addr #4
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!11, !12, !13, !1000}
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!llvm.ident = !{!14}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
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!3 = !DIFile(filename: "test.c", directory: "/")
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!4 = !{}
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!5 = !{!0, !6, !9}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
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!10 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
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!11 = !{i32 7, !"Dwarf Version", i32 4}
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!12 = !{i32 2, !"Debug Info Version", i32 3}
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!13 = !{i32 1, !"wchar_size", i32 4}
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!14 = !{!"clang version 12.0.0"}
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!15 = distinct !DISubprogram(name: "f", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19)
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!16 = !DISubroutineType(types: !17)
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!17 = !{null, !18}
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!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
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!19 = !{!20}
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!20 = !DILocalVariable(name: "g", arg: 1, scope: !15, file: !3, line: 3, type: !18)
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!21 = distinct !DIAssignID()
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!22 = !DILocation(line: 0, scope: !15)
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!23 = distinct !DIAssignID()
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!24 = !DILocation(line: 3, column: 23, scope: !15)
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!29 = !DILocation(line: 3, column: 21, scope: !15)
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!30 = !DILocation(line: 3, column: 26, scope: !15)
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!31 = distinct !DISubprogram(name: "i", scope: !3, file: !3, line: 4, type: !32, scopeLine: 4, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !34)
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!32 = !DISubroutineType(types: !33)
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!33 = !{null}
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!34 = !{!35, !36}
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!35 = !DILocalVariable(name: "h", scope: !31, file: !3, line: 5, type: !8)
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!36 = !DILocalVariable(name: "a", scope: !31, file: !3, line: 5, type: !8)
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!37 = distinct !DIAssignID()
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!38 = !DILocation(line: 0, scope: !31)
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!39 = distinct !DIAssignID()
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!40 = !DILocation(line: 5, column: 3, scope: !31)
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!41 = !DILocation(line: 6, column: 3, scope: !31)
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!42 = !DILocation(line: 6, column: 3, scope: !43)
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!43 = distinct !DILexicalBlock(scope: !31, file: !3, line: 6, column: 3)
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!44 = !DILocation(line: 7, column: 5, scope: !45)
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!45 = distinct !DILexicalBlock(scope: !46, file: !3, line: 6, column: 12)
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!46 = distinct !DILexicalBlock(scope: !43, file: !3, line: 6, column: 3)
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!47 = !DILocation(line: 8, column: 7, scope: !45)
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!48 = distinct !DIAssignID()
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!49 = !DILocation(line: 9, column: 9, scope: !50)
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!50 = distinct !DILexicalBlock(scope: !45, file: !3, line: 9, column: 9)
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!51 = !DILocation(line: 9, column: 9, scope: !45)
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!52 = !DILocation(line: 10, column: 11, scope: !53)
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!53 = distinct !DILexicalBlock(scope: !54, file: !3, line: 10, column: 11)
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!54 = distinct !DILexicalBlock(scope: !50, file: !3, line: 9, column: 12)
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!55 = !DILocation(line: 10, column: 11, scope: !54)
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!56 = distinct !{!56, !42, !57, !58}
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!57 = !DILocation(line: 15, column: 3, scope: !43)
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!58 = !{!"llvm.loop.unroll.disable"}
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!59 = !DILocation(line: 12, column: 11, scope: !54)
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!60 = distinct !DIAssignID()
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!61 = !DILocation(line: 13, column: 5, scope: !54)
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!62 = !DILocation(line: 14, column: 5, scope: !45)
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!63 = !DILocation(line: 6, column: 3, scope: !46)
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!64 = !DISubprogram(name: "e", scope: !3, file: !3, line: 2, type: !65, spFlags: DISPFlagOptimized, retainedNodes: !4)
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!65 = !DISubroutineType(types: !66)
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!66 = !{null, null}
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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