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llvm/test/DebugInfo/Generic/codegenprep-addrsink.ll
- This file was added.
| ; RUN: llc -start-before=codegenprepare -stop-after=codegenprepare %s -o - | FileCheck %s | |||||
| ; | |||||
| ; CGP duplicates address calculation into each basic block that contains loads | |||||
| ; or stores, so that they can be folded into instruction memory operands for | |||||
| ; example. dbg.value's should be redirected to identify such local address | |||||
| ; computations, to give the best opportunity for variable locations to be | |||||
| ; preserved. | |||||
| ; This test has two dbg.values in it, one before and one after the relevant | |||||
| ; memory instruction. Test that the one before does _not_ get updated (as that | |||||
| ; would either make it use-before-def or shift when the variable appears), and | |||||
| ; that the dbg.value after the memory instruction does get updated. | |||||
| ; | |||||
| ; Due to placeDbgValues, the dbg.values currently get shifted up a few | |||||
| ; instructions. | |||||
| define dso_local i8 @foo(i32 *%p, i32 %cond) !dbg !7 { | |||||
| entry: | |||||
| ; The first dbg.value of %arith, in the 'next' block, will be moved up here | |||||
| ; by placeDbgValues, | |||||
| ; CHECK-LABEL: entry: | |||||
| ; CHECK: dbg.value(metadata i8* %arith, metadata ![[DIVAR:[0-9]+]], | |||||
| ; CHECK-SAME: metadata !DIExpression() | |||||
| %casted = bitcast i32 *%p to i8* | |||||
| %arith = getelementptr i8, i8 *%casted, i32 3 | |||||
| %load1 = load i8, i8 *%arith | |||||
| %cmpresult = icmp eq i32 %cond, 0 | |||||
| br i1 %cmpresult, label %next, label %ret | |||||
| next: | |||||
| ; Address calcs should be duplicated into this block. One dbg.value should be | |||||
| ; updated, and the other should not. | |||||
| ; CHECK-LABEL: next: | |||||
| ; CHECK: %[[CASTVAR:[0-9a-zA-Z]+]] = bitcast i32* %p to i8* | |||||
| ; CHECK-NEXT: %[[GEPVAR:[0-9a-zA-Z]+]] = getelementptr i8, i8* %[[CASTVAR]], | |||||
| ; CHECK-SAME: i64 3 | |||||
| ; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* %[[GEPVAR]], | |||||
| ; CHECK-SAME: metadata ![[DIVAR]], | |||||
| ; CHECK-NEXT: %loaded = load i8, i8* %[[GEPVAR]] | |||||
| call void @llvm.dbg.value(metadata i8 *%arith, metadata !12, metadata !DIExpression()), !dbg !14 | |||||
| %loaded = load i8, i8 *%arith | |||||
| call void @llvm.dbg.value(metadata i8 *%arith, metadata !12, metadata !DIExpression()), !dbg !14 | |||||
| ret i8 %loaded | |||||
| ret: | |||||
| ret i8 0 | |||||
| } | |||||
| ; CHECK: ![[DIVAR]] = !DILocalVariable(name: "p", | |||||
| declare void @llvm.dbg.value(metadata, metadata, metadata) | |||||
| !llvm.dbg.cu = !{!0} | |||||
| !llvm.module.flags = !{!3, !4, !5} | |||||
| !llvm.ident = !{!6} | |||||
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) | |||||
| !1 = !DIFile(filename: "test.cpp", directory: ".") | |||||
| !2 = !{} | |||||
| !3 = !{i32 2, !"Dwarf Version", i32 4} | |||||
| !4 = !{i32 2, !"Debug Info Version", i32 3} | |||||
| !5 = !{i32 1, !"wchar_size", i32 4} | |||||
| !6 = !{!"clang version 8.0.0 (trunk 348209)"} | |||||
| !7 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !1, file: !1, line: 4, type: !8, scopeLine: 5, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) | |||||
| !8 = !DISubroutineType(types: !9) | |||||
| !9 = !{null, !10} | |||||
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) | |||||
| !11 = !{!12} | |||||
| !12 = !DILocalVariable(name: "p", arg: 1, scope: !7, file: !1, line: 4, type: !10) | |||||
| !14 = !DILocation(line: 4, column: 15, scope: !7) | |||||
| !20 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7) | |||||