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0c1aee0b16
As a follow-up to r246098, require `DISubprogram` definitions
(`isDefinition: true`) to be 'distinct'. Specifically, add an assembler
check, a verifier check, and bitcode upgrading logic to combat testcase
bitrot after the `DIBuilder` change.
While working on the testcases, I realized that
test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore. Its
purpose was to check for a corner case in PR22792 where two subprogram
definitions match exactly and share the same metadata node. The new
verifier check, requiring that subprogram definitions are 'distinct',
precludes that possibility.
I updated almost all the IR with the following script:
git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' |
grep -v test/Bitcode |
xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/'
Likely some variant of would work for out-of-tree testcases.
llvm-svn: 246327
77 lines
4.3 KiB
LLVM
77 lines
4.3 KiB
LLVM
; RUN: llc < %s
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
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target triple = "thumbv7-apple-darwin3.0.0-iphoneos"
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@length = common global i32 0, align 4 ; <i32*> [#uses=1]
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define void @x0(i8* nocapture %buf, i32 %nbytes) nounwind optsize {
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entry:
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tail call void @llvm.dbg.value(metadata i8* %buf, i64 0, metadata !0, metadata !DIExpression()), !dbg !15
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tail call void @llvm.dbg.value(metadata i32 %nbytes, i64 0, metadata !8, metadata !DIExpression()), !dbg !16
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%tmp = load i32, i32* @length, !dbg !17 ; <i32> [#uses=3]
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%cmp = icmp eq i32 %tmp, -1, !dbg !17 ; <i1> [#uses=1]
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%cmp.not = xor i1 %cmp, true ; <i1> [#uses=1]
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%cmp3 = icmp ult i32 %tmp, %nbytes, !dbg !17 ; <i1> [#uses=1]
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%or.cond = and i1 %cmp.not, %cmp3 ; <i1> [#uses=1]
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tail call void @llvm.dbg.value(metadata i32 %tmp, i64 0, metadata !8, metadata !DIExpression()), !dbg !17
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%nbytes.addr.0 = select i1 %or.cond, i32 %tmp, i32 %nbytes ; <i32> [#uses=1]
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tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !10, metadata !DIExpression()), !dbg !19
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br label %while.cond, !dbg !20
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while.cond: ; preds = %while.body, %entry
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%0 = phi i32 [ 0, %entry ], [ %inc, %while.body ] ; <i32> [#uses=3]
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%buf.addr.0 = getelementptr i8, i8* %buf, i32 %0 ; <i8*> [#uses=1]
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%cmp7 = icmp ult i32 %0, %nbytes.addr.0, !dbg !20 ; <i1> [#uses=1]
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br i1 %cmp7, label %land.rhs, label %while.end, !dbg !20
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land.rhs: ; preds = %while.cond
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%call = tail call i32 @x1() nounwind optsize, !dbg !20 ; <i32> [#uses=2]
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%cmp9 = icmp eq i32 %call, -1, !dbg !20 ; <i1> [#uses=1]
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br i1 %cmp9, label %while.end, label %while.body, !dbg !20
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while.body: ; preds = %land.rhs
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%conv = trunc i32 %call to i8, !dbg !21 ; <i8> [#uses=1]
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store i8 %conv, i8* %buf.addr.0, !dbg !21
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%inc = add i32 %0, 1, !dbg !23 ; <i32> [#uses=1]
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br label %while.cond, !dbg !24
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while.end: ; preds = %land.rhs, %while.cond
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ret void, !dbg !25
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}
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declare i32 @x1() optsize
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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!llvm.dbg.lv.fn = !{!0, !8, !10, !12}
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!llvm.dbg.gv = !{!14}
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!0 = !DILocalVariable(name: "buf", line: 4, arg: 1, scope: !1, file: !2, type: !6)
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!1 = distinct !DISubprogram(name: "x0", linkageName: "x0", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, file: !26, scope: null, type: !4)
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!2 = !DIFile(filename: "t.c", directory: "/private/tmp")
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!3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang 2.0", isOptimized: true, file: !26)
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!4 = !DISubroutineType(types: !5)
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!5 = !{null}
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, file: !26, scope: !2, baseType: !7)
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!7 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
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!8 = !DILocalVariable(name: "nbytes", line: 4, arg: 2, scope: !1, file: !2, type: !9)
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned long", size: 32, align: 32, encoding: DW_ATE_unsigned)
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!10 = !DILocalVariable(name: "nread", line: 6, scope: !11, file: !2, type: !9)
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!11 = distinct !DILexicalBlock(line: 5, column: 1, file: !26, scope: !1)
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!12 = !DILocalVariable(name: "c", line: 7, scope: !11, file: !2, type: !13)
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!13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!14 = !DIGlobalVariable(name: "length", linkageName: "length", line: 1, isLocal: false, isDefinition: true, scope: !2, file: !2, type: !13, variable: i32* @length)
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!15 = !DILocation(line: 4, column: 24, scope: !1)
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!16 = !DILocation(line: 4, column: 43, scope: !1)
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!17 = !DILocation(line: 9, column: 2, scope: !11)
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!18 = !{i32 0}
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!19 = !DILocation(line: 10, column: 2, scope: !11)
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!20 = !DILocation(line: 11, column: 2, scope: !11)
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!21 = !DILocation(line: 12, column: 3, scope: !22)
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!22 = distinct !DILexicalBlock(line: 11, column: 45, file: !26, scope: !11)
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!23 = !DILocation(line: 13, column: 3, scope: !22)
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!24 = !DILocation(line: 14, column: 2, scope: !22)
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!25 = !DILocation(line: 15, column: 1, scope: !11)
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!26 = !DIFile(filename: "t.c", directory: "/private/tmp")
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