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7d6813a6c8
This change simplifies code that has to deal with DIGlobalVariableExpression and mirrors how we treat DIExpressions in debug info intrinsics. Before this change there were two ways of representing empty expressions on globals, a nullptr and an empty !DIExpression(). If someone needs to upgrade out-of-tree testcases: perl -pi -e 's/(!DIGlobalVariableExpression\(var: ![0-9]*)\)/\1, expr: !DIExpression())/g' <MYTEST.ll> will catch 95%. llvm-svn: 312144
72 lines
3.2 KiB
LLVM
72 lines
3.2 KiB
LLVM
; RUN: opt -S -simplifycfg -strip-debug < %s | FileCheck %s
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; RUN: opt -S -simplifycfg < %s | FileCheck %s
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; Test case for BUG-27615
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; Test that simplify cond branch produce same result for debug and non-debug builds
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; CHECK: select i1 %or.cond, i32 -1, i32 5
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; CHECK-NOT: bb1:
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; ModuleID = './csmith107.i.debug.ll'
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source_filename = "./csmith107.i.debug.ll"
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@a = global i16 0, !dbg !0
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@b = global i32 0, !dbg !4
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@c = global i16* null, !dbg !9
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define i16 @fn1() !dbg !17 {
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bb2:
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store i32 -1, i32* @b, align 1
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%_tmp1.pre = load i16, i16* @a, align 1, !dbg !20
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%_tmp2.pre = load i16*, i16** @c, align 1
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tail call void @llvm.dbg.value(metadata i16 6, metadata !22, metadata !23), !dbg !24
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tail call void @llvm.dbg.value(metadata i16 %_tmp1.pre, metadata !25, metadata !23), !dbg !20
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%_tmp3 = load i16, i16* %_tmp2.pre, align 1
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%_tmp4 = icmp ne i16 %_tmp3, 0
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%_tmp6 = icmp ne i16 %_tmp1.pre, 0
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%or.cond = and i1 %_tmp6, %_tmp4
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br i1 %or.cond, label %bb5, label %bb1
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bb1: ; preds = %bb2
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store i32 5, i32* @b, align 1
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br label %bb5
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bb5: ; preds = %bb1, %bb2
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ret i16 0
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nounwind readnone }
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!llvm.dbg.cu = !{!12}
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!llvm.module.flags = !{!15, !16}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "a", scope: null, file: !2, line: 2, type: !3, isLocal: false, isDefinition: true)
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!2 = !DIFile(filename: "csmith107.i.c", directory: "/tmp")
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!3 = !DIBasicType(name: "int", size: 16, align: 16, encoding: DW_ATE_signed)
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = !DIGlobalVariable(name: "b", scope: null, file: !2, line: 3, type: !6, isLocal: false, isDefinition: true)
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!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !2, line: 1, baseType: !7)
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!7 = !DIDerivedType(tag: DW_TAG_typedef, name: "__u32_t", file: !2, baseType: !8)
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!8 = !DIBasicType(name: "unsigned long", size: 32, align: 16, encoding: DW_ATE_unsigned)
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!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
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!10 = !DIGlobalVariable(name: "c", scope: null, file: !2, line: 4, type: !11, isLocal: false, isDefinition: true)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 16, align: 16)
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!12 = distinct !DICompileUnit(language: DW_LANG_C, file: !2, producer: "FlexC Compiler v6.36 (LLVM)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !13, retainedTypes: !13, globals: !14)
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!13 = !{}
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!14 = !{!0, !4, !9}
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!15 = !{i32 2, !"Dwarf Version", i32 4}
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!16 = !{i32 2, !"Debug Info Version", i32 3}
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!17 = distinct !DISubprogram(name: "fn1", scope: !2, file: !2, line: 5, type: !18, isLocal: false, isDefinition: true, scopeLine: 5, isOptimized: false, unit: !12, variables: !13)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!3}
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!20 = !DILocation(line: 8, column: 16, scope: !21)
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!21 = !DILexicalBlock(scope: !17, file: !2, line: 7, column: 29)
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!22 = !DILocalVariable(name: "d", scope: !21, line: 8, type: !3)
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!23 = !DIExpression()
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!24 = !DILocation(line: 8, column: 9, scope: !21)
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!25 = !DILocalVariable(name: "e", scope: !21, line: 8, type: !3)
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