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llvm-mirror/test/DebugInfo/Generic/incorrect-variable-debugloc.ll
Keno Fischer 927308d763 Reapply r257105 "[Verifier] Check that debug values have proper size" 
I originally reapplied this in 257550, but had to revert again due to bot
breakage. The only change in this version is to allow either the TypeSize
or the TypeAllocSize of the variable to be the one represented in debug info
(hopefully in the future we can figure out how to encode the difference).
Additionally, several bot failures following r257550, were due to
optimizer bugs now fixed in r257787 and r257795.

r257550 commit message was:

```
The follow extra changes were made to test cases:

Manually making the variable be the actual type instead of a pointer
to avoid pointer-size differences in generic code:

    LLVM :: DebugInfo/Generic/2010-03-24-MemberFn.ll
    LLVM :: DebugInfo/Generic/2010-04-06-NestedFnDbgInfo.ll
    LLVM :: DebugInfo/Generic/2010-05-03-DisableFramePtr.ll
    LLVM :: DebugInfo/Generic/varargs.ll

Delete sizing information from debug info for the same reason
(but the presence of the pointer was important to the test case):

    LLVM :: DebugInfo/Generic/restrict.ll
    LLVM :: DebugInfo/Generic/tu-composite.ll
    LLVM :: Linker/type-unique-type-array-a.ll
    LLVM :: Linker/type-unique-simple2.ll

Fixing an incorrect DW_OP_deref

    LLVM :: DebugInfo/Generic/2010-05-03-OriginDIE.ll

Fixing a missing DW_OP_deref

    LLVM :: DebugInfo/Generic/incorrect-variable-debugloc.ll

Additionally, clang should no longer complain during bootstrap should no
longer happen after r257534.

The original commit message was:
``
Summary:
Teach the Verifier to make sure that the storage size given to llvm.dbg.declare
or the value size given to llvm.dbg.value agree with what is declared in
DebugInfo. This is implicitly assumed in a number of passes (e.g. in SROA).
Additionally this catches a number of common mistakes, such as passing a
pointer when a value was intended or vice versa.

One complication comes from stack coloring which modifies the original IR when
it merges allocas in order to make sure that if AA falls back to the IR it gets
the correct result. However, given this new invariant, indiscriminately
replacing one alloca by a different (differently sized one) is no longer valid.
Fix this by just undefing out any use of the alloca in a dbg.declare in this
case.

Additionally, I had to fix a number of test cases. Of particular note:
- I regenerated dbg-changes-codegen-branch-folding.ll from the given source as
  it was affected by the bug fixed in r256077
- two-cus-from-same-file.ll was changed to avoid having a variable-typed debug
  variable as that would depend on the target, even though this test is
  supposed to be generic
- I had to manually declared size/align for reference type. See also the
  discussion for D14275/r253186.
- fpstack-debuginstr-kill.ll required changing `double` to `long double`
- most others were just a question of adding OP_deref
``

```

llvm-svn: 257850
2016-01-15 00:46:17 +00:00

392 lines
15 KiB
LLVM
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; REQUIRES: object-emission
; RUN: %llc_dwarf -O2 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; This is a test case that's as reduced as I can get it, though I haven't fully
; understood the mechanisms by which this bug occurs, so perhaps there's further
; simplification to be had (it's certainly a bit non-obvious what's going on). I
; hesitate to hand-craft or otherwise simplify the IR compared to what Clang
; generates as this is a particular tickling of optimizations and debug location
; propagation I want a realistic example of.
; Generated with clang-tot -cc1 -g -O2 -w -std=c++11 -fsanitize=address,use-after-return -fcxx-exceptions -fexceptions -x c++ incorrect-variable-debug-loc.cpp -emit-llvm
; struct A {
; int m_fn1();
; };
;
; struct B {
; void __attribute__((always_inline)) m_fn2() { i = 0; }
; int i;
; };
;
; struct C {
; void m_fn3();
; int j;
; B b;
; };
;
; int fn1() {
; C A;
; A.b.m_fn2();
; A.m_fn3();
; }
; void C::m_fn3() {
; A().m_fn1();
; b.m_fn2();
; }
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name {{.*}} "C"
; CHECK: [[M_FN3_DECL:.*]]: DW_TAG_subprogram
; CHECK-NOT: {{DW_TAG|NULL}}
; CHECK: DW_AT_name {{.*}} "m_fn3"
; CHECK: DW_AT_specification {{.*}} {[[M_FN3_DECL]]}
; CHECK-NOT: DW_TAG
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_TAG
; CHECK: DW_AT_name {{.*}} "this"
%struct.C = type { i32, %struct.B }
%struct.B = type { i32 }
%struct.A = type { i8 }
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
@__asan_option_detect_stack_use_after_return = external global i32
@__asan_gen_ = private unnamed_addr constant [11 x i8] c"1 32 8 1 A\00", align 1
@__asan_gen_1 = private unnamed_addr constant [13 x i8] c"1 32 1 3 tmp\00", align 1
; Function Attrs: noreturn sanitize_address
define i32 @_Z3fn1v() #0 !dbg !22 {
entry:
%MyAlloca = alloca [64 x i8], align 32, !dbg !39
%0 = ptrtoint [64 x i8]* %MyAlloca to i64, !dbg !39
%1 = load i32, i32* @__asan_option_detect_stack_use_after_return, !dbg !39
%2 = icmp ne i32 %1, 0, !dbg !39
br i1 %2, label %3, label %5
; <label>:3 ; preds = %entry
%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0), !dbg !39
br label %5
; <label>:5 ; preds = %entry, %3
%6 = phi i64 [ %0, %entry ], [ %4, %3 ], !dbg !39
%7 = add i64 %6, 32, !dbg !39
%8 = inttoptr i64 %7 to %struct.C*, !dbg !39
%9 = inttoptr i64 %6 to i64*, !dbg !39
store i64 1102416563, i64* %9, !dbg !39
%10 = add i64 %6, 8, !dbg !39
%11 = inttoptr i64 %10 to i64*, !dbg !39
store i64 ptrtoint ([11 x i8]* @__asan_gen_ to i64), i64* %11, !dbg !39
%12 = add i64 %6, 16, !dbg !39
%13 = inttoptr i64 %12 to i64*, !dbg !39
store i64 ptrtoint (i32 ()* @_Z3fn1v to i64), i64* %13, !dbg !39
%14 = lshr i64 %6, 3, !dbg !39
%15 = add i64 %14, 2147450880, !dbg !39
%16 = add i64 %15, 0, !dbg !39
%17 = inttoptr i64 %16 to i64*, !dbg !39
store i64 -868083117767659023, i64* %17, !dbg !39
%i.i = getelementptr inbounds %struct.C, %struct.C* %8, i64 0, i32 1, i32 0, !dbg !39
%18 = ptrtoint i32* %i.i to i64, !dbg !39
%19 = lshr i64 %18, 3, !dbg !39
%20 = add i64 %19, 2147450880, !dbg !39
%21 = inttoptr i64 %20 to i8*, !dbg !39
%22 = load i8, i8* %21, !dbg !39
%23 = icmp ne i8 %22, 0, !dbg !39
br i1 %23, label %24, label %30, !dbg !39
; <label>:24 ; preds = %5
%25 = and i64 %18, 7, !dbg !39
%26 = add i64 %25, 3, !dbg !39
%27 = trunc i64 %26 to i8, !dbg !39
%28 = icmp sge i8 %27, %22, !dbg !39
br i1 %28, label %29, label %30
; <label>:29 ; preds = %24
call void @__asan_report_store4(i64 %18), !dbg !39
call void asm sideeffect "", ""()
unreachable
; <label>:30 ; preds = %24, %5
store i32 0, i32* %i.i, align 4, !dbg !39, !tbaa !41
tail call void @llvm.dbg.value(metadata %struct.C* %8, i64 0, metadata !27, metadata !DIExpression(DW_OP_deref)), !dbg !46
call void @_ZN1C5m_fn3Ev(%struct.C* %8), !dbg !47
unreachable, !dbg !47
}
; Function Attrs: sanitize_address
define void @_ZN1C5m_fn3Ev(%struct.C* nocapture %this) #1 align 2 !dbg !28 {
entry:
%MyAlloca = alloca [64 x i8], align 32, !dbg !48
%0 = ptrtoint [64 x i8]* %MyAlloca to i64, !dbg !48
%1 = load i32, i32* @__asan_option_detect_stack_use_after_return, !dbg !48
%2 = icmp ne i32 %1, 0, !dbg !48
br i1 %2, label %3, label %5
; <label>:3 ; preds = %entry
%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0), !dbg !48
br label %5
; <label>:5 ; preds = %entry, %3
%6 = phi i64 [ %0, %entry ], [ %4, %3 ], !dbg !48
%7 = add i64 %6, 32, !dbg !48
%8 = inttoptr i64 %7 to %struct.A*, !dbg !48
%9 = inttoptr i64 %6 to i64*, !dbg !48
store i64 1102416563, i64* %9, !dbg !48
%10 = add i64 %6, 8, !dbg !48
%11 = inttoptr i64 %10 to i64*, !dbg !48
store i64 ptrtoint ([13 x i8]* @__asan_gen_1 to i64), i64* %11, !dbg !48
%12 = add i64 %6, 16, !dbg !48
%13 = inttoptr i64 %12 to i64*, !dbg !48
store i64 ptrtoint (void (%struct.C*)* @_ZN1C5m_fn3Ev to i64), i64* %13, !dbg !48
%14 = lshr i64 %6, 3, !dbg !48
%15 = add i64 %14, 2147450880, !dbg !48
%16 = add i64 %15, 0, !dbg !48
%17 = inttoptr i64 %16 to i64*, !dbg !48
store i64 -868083113472691727, i64* %17, !dbg !48
tail call void @llvm.dbg.value(metadata %struct.C* %this, i64 0, metadata !30, metadata !DIExpression()), !dbg !48
%call = call i32 @_ZN1A5m_fn1Ev(%struct.A* %8), !dbg !49
%i.i = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 1, i32 0, !dbg !50
%18 = ptrtoint i32* %i.i to i64, !dbg !50
%19 = lshr i64 %18, 3, !dbg !50
%20 = add i64 %19, 2147450880, !dbg !50
%21 = inttoptr i64 %20 to i8*, !dbg !50
%22 = load i8, i8* %21, !dbg !50
%23 = icmp ne i8 %22, 0, !dbg !50
br i1 %23, label %24, label %30, !dbg !50
; <label>:24 ; preds = %5
%25 = and i64 %18, 7, !dbg !50
%26 = add i64 %25, 3, !dbg !50
%27 = trunc i64 %26 to i8, !dbg !50
%28 = icmp sge i8 %27, %22, !dbg !50
br i1 %28, label %29, label %30
; <label>:29 ; preds = %24
call void @__asan_report_store4(i64 %18), !dbg !50
call void asm sideeffect "", ""()
unreachable
; <label>:30 ; preds = %24, %5
store i32 0, i32* %i.i, align 4, !dbg !50, !tbaa !41
store i64 1172321806, i64* %9, !dbg !52
%31 = icmp ne i64 %6, %0, !dbg !52
br i1 %31, label %32, label %39, !dbg !52
; <label>:32 ; preds = %30
%33 = add i64 %15, 0, !dbg !52
%34 = inttoptr i64 %33 to i64*, !dbg !52
store i64 -723401728380766731, i64* %34, !dbg !52
%35 = add i64 %6, 56, !dbg !52
%36 = inttoptr i64 %35 to i64*, !dbg !52
%37 = load i64, i64* %36, !dbg !52
%38 = inttoptr i64 %37 to i8*, !dbg !52
store i8 0, i8* %38, !dbg !52
br label %42, !dbg !52
; <label>:39 ; preds = %30
%40 = add i64 %15, 0, !dbg !52
%41 = inttoptr i64 %40 to i64*, !dbg !52
store i64 0, i64* %41, !dbg !52
br label %42, !dbg !52
; <label>:42 ; preds = %39, %32
ret void, !dbg !52
}
declare i32 @_ZN1A5m_fn1Ev(%struct.A*) #2
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
define internal void @asan.module_ctor() {
tail call void @__asan_init_v3()
ret void
}
declare void @__asan_init_v3()
declare void @__asan_report_load1(i64)
declare void @__asan_load1(i64)
declare void @__asan_report_load2(i64)
declare void @__asan_load2(i64)
declare void @__asan_report_load4(i64)
declare void @__asan_load4(i64)
declare void @__asan_report_load8(i64)
declare void @__asan_load8(i64)
declare void @__asan_report_load16(i64)
declare void @__asan_load16(i64)
declare void @__asan_report_store1(i64)
declare void @__asan_store1(i64)
declare void @__asan_report_store2(i64)
declare void @__asan_store2(i64)
declare void @__asan_report_store4(i64)
declare void @__asan_store4(i64)
declare void @__asan_report_store8(i64)
declare void @__asan_store8(i64)
declare void @__asan_report_store16(i64)
declare void @__asan_store16(i64)
declare void @__asan_report_load_n(i64, i64)
declare void @__asan_report_store_n(i64, i64)
declare void @__asan_loadN(i64, i64)
declare void @__asan_storeN(i64, i64)
declare i8* @__asan_memmove(i8*, i8*, i64)
declare i8* @__asan_memcpy(i8*, i8*, i64)
declare i8* @__asan_memset(i8*, i32, i64)
declare void @__asan_handle_no_return()
declare void @__sanitizer_cov()
declare void @__sanitizer_ptr_cmp(i64, i64)
declare void @__sanitizer_ptr_sub(i64, i64)
declare i64 @__asan_stack_malloc_0(i64, i64)
declare void @__asan_stack_free_0(i64, i64, i64)
declare i64 @__asan_stack_malloc_1(i64, i64)
declare void @__asan_stack_free_1(i64, i64, i64)
declare i64 @__asan_stack_malloc_2(i64, i64)
declare void @__asan_stack_free_2(i64, i64, i64)
declare i64 @__asan_stack_malloc_3(i64, i64)
declare void @__asan_stack_free_3(i64, i64, i64)
declare i64 @__asan_stack_malloc_4(i64, i64)
declare void @__asan_stack_free_4(i64, i64, i64)
declare i64 @__asan_stack_malloc_5(i64, i64)
declare void @__asan_stack_free_5(i64, i64, i64)
declare i64 @__asan_stack_malloc_6(i64, i64)
declare void @__asan_stack_free_6(i64, i64, i64)
declare i64 @__asan_stack_malloc_7(i64, i64)
declare void @__asan_stack_free_7(i64, i64, i64)
declare i64 @__asan_stack_malloc_8(i64, i64)
declare void @__asan_stack_free_8(i64, i64, i64)
declare i64 @__asan_stack_malloc_9(i64, i64)
declare void @__asan_stack_free_9(i64, i64, i64)
declare i64 @__asan_stack_malloc_10(i64, i64)
declare void @__asan_stack_free_10(i64, i64, i64)
declare void @__asan_poison_stack_memory(i64, i64)
declare void @__asan_unpoison_stack_memory(i64, i64)
declare void @__asan_before_dynamic_init(i64)
declare void @__asan_after_dynamic_init()
declare void @__asan_register_globals(i64, i64)
declare void @__asan_unregister_globals(i64, i64)
declare void @__sanitizer_cov_module_init(i64)
attributes #0 = { noreturn sanitize_address "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" }
attributes #1 = { sanitize_address "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" }
attributes #2 = { "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" }
attributes #3 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!36, !37}
!llvm.ident = !{!38}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !21, globals: !2, imports: !2)
!1 = !DIFile(filename: "<stdin>", directory: "/tmp/dbginfo")
!2 = !{}
!3 = !{!4, !14}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 10, size: 64, align: 32, file: !5, elements: !6, identifier: "_ZTS1C")
!5 = !DIFile(filename: "incorrect-variable-debug-loc.cpp", directory: "/tmp/dbginfo")
!6 = !{!7, !9, !10}
!7 = !DIDerivedType(tag: DW_TAG_member, name: "j", line: 12, size: 32, align: 32, file: !5, scope: !"_ZTS1C", baseType: !8)
!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 13, size: 32, align: 32, offset: 32, file: !5, scope: !"_ZTS1C", baseType: !"_ZTS1B")
!10 = !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", line: 11, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !5, scope: !"_ZTS1C", type: !11)
!11 = !DISubroutineType(types: !12)
!12 = !{null, !13}
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1C")
!14 = !DICompositeType(tag: DW_TAG_structure_type, name: "B", line: 5, size: 32, align: 32, file: !5, elements: !15, identifier: "_ZTS1B")
!15 = !{!16, !17}
!16 = !DIDerivedType(tag: DW_TAG_member, name: "i", line: 7, size: 32, align: 32, file: !5, scope: !"_ZTS1B", baseType: !8)
!17 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1B5m_fn2Ev", line: 6, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !5, scope: !"_ZTS1B", type: !18)
!18 = !DISubroutineType(types: !19)
!19 = !{null, !20}
!20 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1B")
!21 = !{!22, !28, !32}
!22 = distinct !DISubprogram(name: "fn1", linkageName: "_Z3fn1v", line: 16, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 16, file: !5, scope: !23, type: !24, variables: !26)
!23 = !DIFile(filename: "incorrect-variable-debug-loc.cpp", directory: "/tmp/dbginfo")
!24 = !DISubroutineType(types: !25)
!25 = !{!8}
!26 = !{!27}
!27 = !DILocalVariable(name: "A", line: 17, scope: !22, file: !23, type: !"_ZTS1C")
!28 = distinct !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", line: 21, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 21, file: !5, scope: !"_ZTS1C", type: !11, declaration: !10, variables: !29)
!29 = !{!30}
!30 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !31)
!31 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1C")
!32 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1B5m_fn2Ev", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !5, scope: !"_ZTS1B", type: !18, declaration: !17, variables: !33)
!33 = !{!34}
!34 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !32, type: !35)
!35 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1B")
!36 = !{i32 2, !"Dwarf Version", i32 4}
!37 = !{i32 2, !"Debug Info Version", i32 3}
!38 = !{!"clang version 3.5.0 "}
!39 = !DILocation(line: 6, scope: !32, inlinedAt: !40)
!40 = !DILocation(line: 18, scope: !22)
!41 = !{!42, !43, i64 0}
!42 = !{!"_ZTS1B", !43, i64 0}
!43 = !{!"int", !44, i64 0}
!44 = !{!"omnipotent char", !45, i64 0}
!45 = !{!"Simple C/C++ TBAA"}
!46 = !DILocation(line: 17, scope: !22)
!47 = !DILocation(line: 19, scope: !22)
!48 = !DILocation(line: 0, scope: !28)
!49 = !DILocation(line: 22, scope: !28)
!50 = !DILocation(line: 6, scope: !32, inlinedAt: !51)
!51 = !DILocation(line: 23, scope: !28)
!52 = !DILocation(line: 24, scope: !28)
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