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llvm-project/llvm/test/DebugInfo/X86/safestack-byval.ll

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Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
; Test dwarf codegen for DILocalVariable of a byval function argument that
; points to neither an argument nor an alloca. This kind of IR is generated by
; SafeStack for unsafe byval arguments.
[MIR] Print on the given output instead of stderr. Currently the MIR framework prints all its outputs (errors and actual representation) on stderr. This patch fixes that by printing the regular output in the output specified with -o. Differential Revision: http://reviews.llvm.org/D22251 llvm-svn: 275314
2016-07-14 04:36:03 +08:00
; RUN: llc -mtriple=x86_64-unknown-unknown -stop-after expand-isel-pseudos %s -o - | FileCheck %s
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
; This was built by compiling the following source with SafeStack and
; simplifying the result a little.
; struct S {
; int a[100];
; };
;
; int f(S zzz, unsigned long len) {
; return zzz.a[len];
; }
; CHECK: ![[ZZZ:.*]] = !DILocalVariable(name: "zzz",
; CHECK: ![[ZZZ_EXPR:.*]] = !DIExpression(DW_OP_deref, DW_OP_minus, 400)
; CHECK: DBG_VALUE {{.*}} ![[ZZZ]], ![[ZZZ_EXPR]]
%struct.S = type { [100 x i32] }
@__safestack_unsafe_stack_ptr = external thread_local(initialexec) global i8*
; Function Attrs: norecurse nounwind readonly safestack uwtable
define i32 @_Z1f1Sm(%struct.S* byval nocapture readonly align 8 %zzz, i64 %len) #0 !dbg !12 {
entry:
%unsafe_stack_ptr = load i8*, i8** @__safestack_unsafe_stack_ptr, !dbg !22
%unsafe_stack_static_top = getelementptr i8, i8* %unsafe_stack_ptr, i32 -400, !dbg !22
store i8* %unsafe_stack_static_top, i8** @__safestack_unsafe_stack_ptr, !dbg !22
; !17 describes "zzz"
call void @llvm.dbg.declare(metadata i8* %unsafe_stack_ptr, metadata !17, metadata !23), !dbg !22
%0 = getelementptr i8, i8* %unsafe_stack_ptr, i32 -400, !dbg !22
%zzz.unsafe-byval = bitcast i8* %0 to %struct.S*, !dbg !22
%1 = bitcast %struct.S* %zzz to i8*, !dbg !24
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 400, i32 8, i1 false), !dbg !24
tail call void @llvm.dbg.value(metadata i64 %len, i64 0, metadata !18, metadata !25), !dbg !24
%arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz.unsafe-byval, i64 0, i32 0, i64 %len, !dbg !26
%2 = load i32, i32* %arrayidx, align 4, !dbg !26, !tbaa !27
store i8* %unsafe_stack_ptr, i8** @__safestack_unsafe_stack_ptr, !dbg !31
ret i32 %2, !dbg !31
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #2
attributes #0 = { norecurse nounwind readonly safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }
attributes #2 = { argmemonly nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!19, !20}
!llvm.ident = !{!21}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
2016-04-15 23:57:41 +08:00
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 254107) (llvm/trunk 254109)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
!1 = !DIFile(filename: "../llvm/1.cc", directory: "/tmp/build")
!2 = !{}
!3 = !{!4}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 4, size: 3200, align: 32, elements: !5, identifier: "_ZTS1S")
!5 = !{!6}
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!6 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !4, file: !1, line: 5, baseType: !7, size: 3200, align: 32)
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 3200, align: 32, elements: !9)
!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !{!10}
!10 = !DISubrange(count: 100)
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
2016-04-15 23:57:41 +08:00
!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1f1Sm", scope: !1, file: !1, line: 8, type: !13, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !16)
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
!13 = !DISubroutineType(types: !14)
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!14 = !{!8, !4, !15}
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
!15 = !DIBasicType(name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!16 = !{!17, !18}
DebugInfo: Remove MDString-based type references Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around DIType*. It is no longer legal to refer to a DICompositeType by its 'identifier:', and DIBuilder no longer retains all types with an 'identifier:' automatically. Aside from the bitcode upgrade, this is mainly removing logic to resolve an MDString-based reference to an actualy DIType. The commits leading up to this have made the implicit type map in DICompileUnit's 'retainedTypes:' field superfluous. This does not remove DITypeRef, DIScopeRef, DINodeRef, and DITypeRefArray, or stop using them in DI-related metadata. Although as of this commit they aren't serving a useful purpose, there are patchces under review to reuse them for CodeView support. The tests in LLVM were updated with deref-typerefs.sh, which is attached to the thread "[RFC] Lazy-loading of debug info metadata": http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html llvm-svn: 267296
2016-04-24 05:08:00 +08:00
!17 = !DILocalVariable(name: "zzz", arg: 1, scope: !12, file: !1, line: 8, type: !4)
Extend debug info for function parameters in SDAG. SDAG currently can emit debug location for function parameters when an llvm.dbg.declare points to either a function argument SSA temp, or to an AllocaInst. This change extends this logic by adding a fallback case when neither of the above is true. This is required for SafeStack, which may copy the contents of a byval function argument into something that is not an alloca, and then describe the target as the new location of the said argument. llvm-svn: 254352
2015-12-01 08:34:30 +08:00
!18 = !DILocalVariable(name: "len", arg: 2, scope: !12, file: !1, line: 8, type: !15)
!19 = !{i32 2, !"Dwarf Version", i32 4}
!20 = !{i32 2, !"Debug Info Version", i32 3}
!21 = !{!"clang version 3.8.0 (trunk 254107) (llvm/trunk 254109)"}
!22 = !DILocation(line: 8, column: 9, scope: !12)
!23 = !DIExpression(DW_OP_deref, DW_OP_minus, 400)
!24 = !DILocation(line: 8, column: 28, scope: !12)
!25 = !DIExpression()
!26 = !DILocation(line: 9, column: 10, scope: !12)
!27 = !{!28, !28, i64 0}
!28 = !{!"int", !29, i64 0}
!29 = !{!"omnipotent char", !30, i64 0}
!30 = !{!"Simple C/C++ TBAA"}
!31 = !DILocation(line: 9, column: 3, scope: !12)