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9337b9eb4a
The insertion of an unconditional branch during FastISel can differ depending on building with or without debug information. This happens because FastISel::fastEmitBranch emits an unconditional branch depending on the size of the current basic block without distinguishing between debug and non-debug instructions. This patch fixes this issue by ignoring debug instructions when getting the size of the basic block. Reviewers: aprantl Reviewed By: aprantl Subscribers: ormris, aprantl, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67703 llvm-svn: 372389
44 lines
1.8 KiB
LLVM
44 lines
1.8 KiB
LLVM
; RUN: llc -mtriple=aarch64-arm-none-eabi -O1 -opt-bisect-limit=2 -o - %s 2> /dev/null | FileCheck %s
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define dso_local i32 @a() #0 !dbg !7 {
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entry:
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; CHECK: b .LBB0_1
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; CHECK: .LBB0_1:
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call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
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br label %for.cond, !dbg !14
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; CHECK: b .LBB0_1
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; CHECK: .Lfunc_end0:
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for.cond:
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br label %for.cond, !dbg !15, !llvm.loop !18
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "fast-isel-branch-uncond-debug.ll", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!""}
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!7 = distinct !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 2, type: !10)
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!13 = !DILocation(line: 0, scope: !7)
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!14 = !DILocation(line: 3, column: 3, scope: !7)
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!15 = !DILocation(line: 3, column: 3, scope: !16)
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!16 = distinct !DILexicalBlock(scope: !17, file: !1, line: 3, column: 3)
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!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 3)
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!18 = distinct !{!18, !19, !20}
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!19 = !DILocation(line: 3, column: 3, scope: !17)
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!20 = !DILocation(line: 4, column: 5, scope: !17)
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