[llvm] [DebugInfo] Add debug info test for jump table (PR #71018)
via llvm-commits
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Wed Nov 1 21:58:11 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-debuginfo
Author: None (HaohaiWen)
<details>
<summary>Changes</summary>
Test whether jump table BB has debug info after ISel.
---
Full diff: https://github.com/llvm/llvm-project/pull/71018.diff
1 Files Affected:
- (added) llvm/test/DebugInfo/Generic/debug-info-jump-table.ll (+176)
``````````diff
diff --git a/llvm/test/DebugInfo/Generic/debug-info-jump-table.ll b/llvm/test/DebugInfo/Generic/debug-info-jump-table.ll
new file mode 100644
index 000000000000000..b73d05441f654bb
--- /dev/null
+++ b/llvm/test/DebugInfo/Generic/debug-info-jump-table.ll
@@ -0,0 +1,176 @@
+; RUN: llc -debug-only=isel %s -o /dev/null 2>&1 | FileCheck --match-full-lines %s
+
+source_filename = "jump_table.c"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+ at str = private unnamed_addr constant [2 x i8] c"1\00", align 1
+ at str.12 = private unnamed_addr constant [2 x i8] c"2\00", align 1
+ at str.13 = private unnamed_addr constant [2 x i8] c"3\00", align 1
+ at str.14 = private unnamed_addr constant [2 x i8] c"4\00", align 1
+ at str.15 = private unnamed_addr constant [2 x i8] c"5\00", align 1
+ at str.16 = private unnamed_addr constant [2 x i8] c"6\00", align 1
+ at str.17 = private unnamed_addr constant [2 x i8] c"7\00", align 1
+ at str.18 = private unnamed_addr constant [2 x i8] c"8\00", align 1
+ at str.19 = private unnamed_addr constant [2 x i8] c"9\00", align 1
+ at str.20 = private unnamed_addr constant [3 x i8] c"10\00", align 1
+ at str.21 = private unnamed_addr constant [3 x i8] c"11\00", align 1
+ at str.22 = private unnamed_addr constant [3 x i8] c"12\00", align 1
+
+
+
+; Function Attrs: nofree nounwind uwtable
+define dso_local void @foo(i32 noundef %cond) local_unnamed_addr #0 !dbg !42 {
+;CHECK: Initial selection DAG: %bb.{{[0-9]+}} 'foo:entry'
+;CHECK: SelectionDAG has 5 nodes:
+;CHECK: [[TMP1:t.*]]: ch,glue = EntryToken
+;CHECK: [[TMP2:t.*]]: i64,ch = CopyFromReg [[TMP1]], Register:i64 %{{[0-9]+}}
+;CHECK: t{{[0-9]+}}: ch = br_jt [[TMP2]]:1, JumpTable:i64<0>, [[TMP2]]
+
+entry:
+ call void @llvm.dbg.value(metadata i32 %cond, metadata !47, metadata !DIExpression()), !dbg !48
+ switch i32 %cond, label %sw.epilog [
+ i32 1, label %sw.bb
+ i32 2, label %sw.bb1
+ i32 3, label %sw.bb3
+ i32 4, label %sw.bb5
+ i32 5, label %sw.bb7
+ i32 6, label %sw.bb9
+ i32 7, label %sw.bb11
+ i32 8, label %sw.bb13
+ i32 9, label %sw.bb15
+ i32 10, label %sw.bb17
+ i32 11, label %sw.bb19
+ i32 12, label %sw.bb21
+ ], !dbg !49
+
+sw.bb: ; preds = %entry
+ %puts = tail call i32 @puts(ptr nonnull dereferenceable(1) @str), !dbg !50
+ br label %sw.bb1, !dbg !50
+
+sw.bb1: ; preds = %entry, %sw.bb
+ %puts23 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.12), !dbg !52
+ br label %sw.bb3, !dbg !52
+
+sw.bb3: ; preds = %entry, %sw.bb1
+ %puts24 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.13), !dbg !53
+ br label %sw.bb5, !dbg !53
+
+sw.bb5: ; preds = %entry, %sw.bb3
+ %puts25 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.14), !dbg !54
+ br label %sw.bb7, !dbg !54
+
+sw.bb7: ; preds = %entry, %sw.bb5
+ %puts26 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.15), !dbg !55
+ br label %sw.bb9, !dbg !55
+
+sw.bb9: ; preds = %entry, %sw.bb7
+ %puts27 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.16), !dbg !56
+ br label %sw.bb11, !dbg !56
+
+sw.bb11: ; preds = %entry, %sw.bb9
+ %puts28 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.17), !dbg !57
+ br label %sw.bb13, !dbg !57
+
+sw.bb13: ; preds = %entry, %sw.bb11
+ %puts29 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.18), !dbg !58
+ br label %sw.bb15, !dbg !58
+
+sw.bb15: ; preds = %entry, %sw.bb13
+ %puts30 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.19), !dbg !59
+ br label %sw.bb17, !dbg !59
+
+sw.bb17: ; preds = %entry, %sw.bb15
+ %puts31 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.20), !dbg !60
+ br label %sw.bb19, !dbg !60
+
+sw.bb19: ; preds = %entry, %sw.bb17
+ %puts32 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.21), !dbg !61
+ br label %sw.bb21, !dbg !61
+
+sw.bb21: ; preds = %entry, %sw.bb19
+ %puts33 = tail call i32 @puts(ptr nonnull dereferenceable(1) @str.22), !dbg !62
+ ret void, !dbg !63
+
+sw.epilog: ; preds = %entry
+ ret void, !dbg !63
+}
+
+; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+; Function Attrs: nofree nounwind
+declare noundef i32 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2
+
+attributes #0 = { nofree nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
+attributes #2 = { nofree nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!34, !35, !36, !37, !38, !39, !40}
+!llvm.ident = !{!41}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 18.0.0 (https://github.com/llvm/llvm-project.git 24cf476bd6d144b9fa28325b4d16e3c9dbfc4d4f)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !2, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "jump_table.c", directory: "/export/compilers/llvm-project", checksumkind: CSK_MD5, checksum: "0847b70de02e07499cd0177d1bdc6dae")
+!2 = !{!3, !9, !11, !13, !15, !17, !19, !21, !23, !25, !30, !32}
+!3 = !DIGlobalVariableExpression(var: !4, expr: !DIExpression())
+!4 = distinct !DIGlobalVariable(scope: null, file: !1, line: 6, type: !5, isLocal: true, isDefinition: true)
+!5 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 24, elements: !7)
+!6 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!7 = !{!8}
+!8 = !DISubrange(count: 3)
+!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
+!10 = distinct !DIGlobalVariable(scope: null, file: !1, line: 8, type: !5, isLocal: true, isDefinition: true)
+!11 = !DIGlobalVariableExpression(var: !12, expr: !DIExpression())
+!12 = distinct !DIGlobalVariable(scope: null, file: !1, line: 10, type: !5, isLocal: true, isDefinition: true)
+!13 = !DIGlobalVariableExpression(var: !14, expr: !DIExpression())
+!14 = distinct !DIGlobalVariable(scope: null, file: !1, line: 12, type: !5, isLocal: true, isDefinition: true)
+!15 = !DIGlobalVariableExpression(var: !16, expr: !DIExpression())
+!16 = distinct !DIGlobalVariable(scope: null, file: !1, line: 14, type: !5, isLocal: true, isDefinition: true)
+!17 = !DIGlobalVariableExpression(var: !18, expr: !DIExpression())
+!18 = distinct !DIGlobalVariable(scope: null, file: !1, line: 16, type: !5, isLocal: true, isDefinition: true)
+!19 = !DIGlobalVariableExpression(var: !20, expr: !DIExpression())
+!20 = distinct !DIGlobalVariable(scope: null, file: !1, line: 18, type: !5, isLocal: true, isDefinition: true)
+!21 = !DIGlobalVariableExpression(var: !22, expr: !DIExpression())
+!22 = distinct !DIGlobalVariable(scope: null, file: !1, line: 20, type: !5, isLocal: true, isDefinition: true)
+!23 = !DIGlobalVariableExpression(var: !24, expr: !DIExpression())
+!24 = distinct !DIGlobalVariable(scope: null, file: !1, line: 22, type: !5, isLocal: true, isDefinition: true)
+!25 = !DIGlobalVariableExpression(var: !26, expr: !DIExpression())
+!26 = distinct !DIGlobalVariable(scope: null, file: !1, line: 24, type: !27, isLocal: true, isDefinition: true)
+!27 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 32, elements: !28)
+!28 = !{!29}
+!29 = !DISubrange(count: 4)
+!30 = !DIGlobalVariableExpression(var: !31, expr: !DIExpression())
+!31 = distinct !DIGlobalVariable(scope: null, file: !1, line: 26, type: !27, isLocal: true, isDefinition: true)
+!32 = !DIGlobalVariableExpression(var: !33, expr: !DIExpression())
+!33 = distinct !DIGlobalVariable(scope: null, file: !1, line: 28, type: !27, isLocal: true, isDefinition: true)
+!34 = !{i32 7, !"Dwarf Version", i32 5}
+!35 = !{i32 2, !"Debug Info Version", i32 3}
+!36 = !{i32 1, !"wchar_size", i32 4}
+!37 = !{i32 8, !"PIC Level", i32 2}
+!38 = !{i32 7, !"PIE Level", i32 2}
+!39 = !{i32 7, !"uwtable", i32 2}
+!40 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
+!41 = !{!"clang version 18.0.0 (https://github.com/llvm/llvm-project.git 24cf476bd6d144b9fa28325b4d16e3c9dbfc4d4f)"}
+!42 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !43, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !46)
+!43 = !DISubroutineType(types: !44)
+!44 = !{null, !45}
+!45 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!46 = !{!47}
+!47 = !DILocalVariable(name: "cond", arg: 1, scope: !42, file: !1, line: 3, type: !45)
+!48 = !DILocation(line: 0, scope: !42)
+!49 = !DILocation(line: 4, column: 3, scope: !42)
+!50 = !DILocation(line: 6, column: 5, scope: !51)
+!51 = distinct !DILexicalBlock(scope: !42, file: !1, line: 4, column: 17)
+!52 = !DILocation(line: 8, column: 5, scope: !51)
+!53 = !DILocation(line: 10, column: 5, scope: !51)
+!54 = !DILocation(line: 12, column: 5, scope: !51)
+!55 = !DILocation(line: 14, column: 5, scope: !51)
+!56 = !DILocation(line: 16, column: 5, scope: !51)
+!57 = !DILocation(line: 18, column: 5, scope: !51)
+!58 = !DILocation(line: 20, column: 5, scope: !51)
+!59 = !DILocation(line: 22, column: 5, scope: !51)
+!60 = !DILocation(line: 24, column: 5, scope: !51)
+!61 = !DILocation(line: 26, column: 5, scope: !51)
+!62 = !DILocation(line: 28, column: 5, scope: !51)
+!63 = !DILocation(line: 30, column: 1, scope: !42)
``````````
</details>
https://github.com/llvm/llvm-project/pull/71018
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