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8c493b5ff3
This fixes the issue exposed in PR31393, where we weren't trying sufficiently hard to diagnose bad TBAA metadata. This does reduce the variety in the error messages we print out, but I think the tradeoff of verifying more, simply and quickly overrules the need for more helpful error messags here. llvm-svn: 290713
139 lines
6.0 KiB
LLVM
139 lines
6.0 KiB
LLVM
; REQUIRES: object-emission
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; RUN: llc -mtriple=i386-linux-gnu -filetype=obj -relocation-model=pic %s -o /dev/null
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; Derived from the test case in PR20367, there's nothing really positive to
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; test here (hence no FileCheck, etc). All that was wrong is that the debug info
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; intrinsics (introduced by inlining) in 'f1' were causing codegen to crash, but
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; since 'f1' is a nodebug function, there's no positive outcome to confirm, just
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; that debug info doesn't get in the way/cause a crash.
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; The test case isn't particularly well reduced/tidy, but as simple as I could
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; get the C++ source. I assume the complexity is mostly just about producing a
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; certain amount of register pressure, so it might be able to be simplified/made
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; more uniform.
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; Generated from:
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; $ clang-tot -cc1 -triple i386 -emit-obj -g -O3 repro.cpp
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; void sink(const void *);
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; int source();
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; void f3(int);
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;
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; extern bool b;
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;
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; struct string {
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; unsigned *mem;
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; };
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;
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; extern string &str;
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;
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; inline __attribute__((always_inline)) void s2(string *lhs) { sink(lhs->mem); }
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; inline __attribute__((always_inline)) void f() {
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; string str2;
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; s2(&str2);
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; sink(&str2);
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; }
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; void __attribute__((nodebug)) f1() {
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; for (int iter = 0; iter != 2; ++iter) {
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; f();
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; sink(str.mem);
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; if (b) return;
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; }
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; }
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%struct.string = type { i32* }
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@str = external constant %struct.string*
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@b = external global i8
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; Function Attrs: nounwind
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define void @_Z2f1v() #0 {
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entry:
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%str2.i = alloca %struct.string, align 4
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%0 = bitcast %struct.string* %str2.i to i8*, !dbg !26
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%1 = load %struct.string*, %struct.string** @str, align 4
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%mem = getelementptr inbounds %struct.string, %struct.string* %1, i32 0, i32 0
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%iter.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !26
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call void @llvm.dbg.value(metadata %struct.string* %str2.i, i64 0, metadata !16, metadata !DIExpression(DW_OP_deref)) #3, !dbg !26
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call void @llvm.dbg.value(metadata %struct.string* %str2.i, i64 0, metadata !27, metadata !DIExpression(DW_OP_deref)) #3, !dbg !29
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call void @_Z4sinkPKv(i8* undef) #3, !dbg !29
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call void @_Z4sinkPKv(i8* %0) #3, !dbg !30
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call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !31
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%2 = load i32*, i32** %mem, align 4, !tbaa !32
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%3 = bitcast i32* %2 to i8*
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call void @_Z4sinkPKv(i8* %3) #3
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%4 = load i8, i8* @b, align 1, !tbaa !37, !range !39
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%tobool = icmp ne i8 %4, 0
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%inc = add nsw i32 %iter.02, 1
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%cmp = icmp eq i32 %inc, 2
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%or.cond = or i1 %tobool, %cmp
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br i1 %or.cond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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declare void @_Z4sinkPKv(i8*) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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; Function Attrs: nounwind
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declare void @llvm.lifetime.start(i64, i8* nocapture) #3
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; Function Attrs: nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) #3
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attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!23, !24}
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!llvm.ident = !{!25}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "<stdin>", directory: "/tmp/dbginfo")
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!2 = !{}
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!3 = !{!4}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "string", line: 7, size: 32, align: 32, file: !5, elements: !6, identifier: "_ZTS6string")
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!5 = !DIFile(filename: "repro.cpp", directory: "/tmp/dbginfo")
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!6 = !{!7}
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "mem", line: 8, size: 32, align: 32, file: !5, scope: !4, baseType: !8)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !9)
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
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!11 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", line: 14, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 14, file: !5, scope: !12, type: !13, variables: !15)
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!12 = !DIFile(filename: "repro.cpp", directory: "/tmp/dbginfo")
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!13 = !DISubroutineType(types: !14)
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!14 = !{null}
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!15 = !{!16}
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!16 = !DILocalVariable(name: "str2", line: 15, scope: !11, file: !12, type: !4)
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!17 = distinct !DISubprogram(name: "s2", linkageName: "_Z2s2P6string", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !5, scope: !12, type: !18, variables: !21)
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!18 = !DISubroutineType(types: !19)
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!19 = !{null, !20}
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!20 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !4)
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!21 = !{!22}
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!22 = !DILocalVariable(name: "lhs", line: 13, arg: 1, scope: !17, file: !12, type: !20)
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!23 = !{i32 2, !"Dwarf Version", i32 4}
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!24 = !{i32 2, !"Debug Info Version", i32 3}
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!25 = !{!"clang version 3.5.0 "}
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!26 = !DILocation(line: 15, scope: !11)
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!27 = !DILocalVariable(name: "lhs", line: 13, arg: 1, scope: !17, file: !12, type: !20)
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!28 = !DILocation(line: 16, scope: !11)
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!29 = !DILocation(line: 13, scope: !17, inlinedAt: !28)
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!30 = !DILocation(line: 17, scope: !11)
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!31 = !DILocation(line: 18, scope: !11)
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!32 = !{!33, !34, i64 0}
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!33 = !{!"struct", !34, i64 0}
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!34 = !{!"any pointer", !35, i64 0}
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!35 = !{!"omnipotent char", !36, i64 0}
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!36 = !{!"Simple C/C++ TBAA"}
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!37 = !{!38, !38, i64 0}
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!38 = !{!"bool", !35, i64 0}
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!39 = !{i8 0, i8 2}
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