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6c8ec11f5c
This patch fixes PR27615. @llvm.dbg.value instructions no longer count towards the maximum number of instructions to look back at in the instruction list when searching for a store instruction. This should make the output consistent between debug and non-debug build. Patch by Henric Karlsson <henric.karlsson@ericsson.com>! Differential Revision: http://reviews.llvm.org/D19912 llvm-svn: 268512
69 lines
3.0 KiB
LLVM
69 lines
3.0 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
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@b = global i32 0
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@c = global i16* null
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; Function Attrs: nounwind
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define i16 @fn1() #3 !dbg !15 {
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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 !19
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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, i64 0, metadata !22, metadata !23), !dbg !24
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tail call void @llvm.dbg.value(metadata i16 %_tmp1.pre, i64 0, metadata !25, metadata !23), !dbg !19
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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, i64, metadata, metadata) #4
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "FlexC Compiler v6.36 (LLVM)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !3)
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!1 = !DIFile(filename: "csmith107.i.c", directory: "/tmp")
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!2 = !{}
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!3 = !{!4, !6, !10}
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!4 = !DIGlobalVariable(name: "a", scope: null, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, variable: i16* @a)
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!5 = !DIBasicType(name: "int", size: 16, align: 16, encoding: DW_ATE_signed)
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!6 = !DIGlobalVariable(name: "b", scope: null, file: !1, line: 3, type: !7, isLocal: false, isDefinition: true, variable: i32* @b)
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!7 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !1, line: 1, baseType: !8)
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!8 = !DIDerivedType(tag: DW_TAG_typedef, name: "__u32_t", file: !1, baseType: !9)
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!9 = !DIBasicType(name: "unsigned long", size: 32, align: 16, encoding: DW_ATE_unsigned)
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!10 = !DIGlobalVariable(name: "c", scope: null, file: !1, line: 4, type: !11, isLocal: false, isDefinition: true, variable: i16** @c)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 16, align: 16)
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!12 = !{i32 2, !"Dwarf Version", i32 4}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !16, isLocal: false, isDefinition: true, scopeLine: 5, isOptimized: false, unit: !0, variables: !2)
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!16 = !DISubroutineType(types: !17)
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!17 = !{!5}
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!19 = !DILocation(line: 8, column: 16, scope: !20)
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!20 = !DILexicalBlock(scope: !15, file: !1, line: 7, column: 29)
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!22 = !DILocalVariable(name: "d", scope: !20, line: 8, type: !5)
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!23 = !DIExpression()
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!24 = !DILocation(line: 8, column: 9, scope: !20)
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!25 = !DILocalVariable(name: "e", scope: !20, line: 8, type: !5)
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