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llvm-mirror/test/DebugInfo/X86/debug-ranges-offset.ll
Shiva Chen a2029fa58e [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 
In order to set breakpoints on labels and list source code around
labels, we need collect debug information for labels, i.e., label
name, the function label belong, line number in the file, and the
address label located. In order to keep these information in LLVM
IR and to allow backend to generate debug information correctly.
We create a new kind of metadata for labels, DILabel. The format
of DILabel is

!DILabel(scope: !1, name: "foo", file: !2, line: 3)

We hope to keep debug information as much as possible even the
code is optimized. So, we create a new kind of intrinsic for label
metadata to avoid the metadata is eliminated with basic block.
The intrinsic will keep existing if we keep it from optimized out.
The format of the intrinsic is

llvm.dbg.label(metadata !1)

It has only one argument, that is the DILabel metadata. The
intrinsic will follow the label immediately. Backend could get the
label metadata through the intrinsic's parameter.

We also create DIBuilder API for labels to be used by Frontend.
Frontend could use createLabel() to allocate DILabel objects, and use
insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR.

Differential Revision: https://reviews.llvm.org/D45024

Patch by Hsiangkai Wang.

llvm-svn: 331841
2018-05-09 02:40:45 +00:00

241 lines
11 KiB
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; RUN: llc -filetype=obj -mtriple=x86_64-pc-linux-gnu %s -o %t
; RUN: llvm-readobj --relocations %t | FileCheck %s
; Check that we don't have any relocations in the ranges section -
; to show that we're producing this as a relative offset to the
; low_pc for the compile unit.
; CHECK-NOT: .rela.debug_ranges
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 0, void ()* @__msan_init }]
@str = private unnamed_addr constant [4 x i8] c"zzz\00"
@__msan_retval_tls = external thread_local(initialexec) global [8 x i64]
@__msan_retval_origin_tls = external thread_local(initialexec) global i32
@__msan_param_tls = external thread_local(initialexec) global [1000 x i64]
@__msan_param_origin_tls = external thread_local(initialexec) global [1000 x i32]
@__msan_va_arg_tls = external thread_local(initialexec) global [1000 x i64]
@__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
@__msan_origin_tls = external thread_local(initialexec) global i32
@__executable_start = external hidden global i32
@_end = external hidden global i32
; Function Attrs: sanitize_memory uwtable
define void @_Z1fv() #0 !dbg !4 {
entry:
%p = alloca i32*, align 8
%0 = ptrtoint i32** %p to i64, !dbg !19
%1 = and i64 %0, -70368744177672, !dbg !19
%2 = inttoptr i64 %1 to i64*, !dbg !19
store i64 -1, i64* %2, align 8, !dbg !19
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !19
store i64 0, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
%call = call i8* @_Znwm(i64 4) #4, !dbg !19
%_msret = load i64, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
%3 = bitcast i8* %call to i32*, !dbg !19
tail call void @llvm.dbg.value(metadata i32* %3, metadata !9, metadata !DIExpression()), !dbg !19
%4 = inttoptr i64 %1 to i64*, !dbg !19
store i64 %_msret, i64* %4, align 8, !dbg !19
store volatile i32* %3, i32** %p, align 8, !dbg !19
tail call void @llvm.dbg.value(metadata i32** %p, metadata !9, metadata !DIExpression()), !dbg !19
%p.0.p.0. = load volatile i32*, i32** %p, align 8, !dbg !20
%_msld = load i64, i64* %4, align 8, !dbg !20
%_mscmp = icmp eq i64 %_msld, 0, !dbg !20
br i1 %_mscmp, label %6, label %5, !dbg !20, !prof !22
; <label>:5 ; preds = %entry
call void @__msan_warning_noreturn(), !dbg !20
call void asm sideeffect "", ""() #3, !dbg !20
unreachable, !dbg !20
; <label>:6 ; preds = %entry
%7 = load i32, i32* %p.0.p.0., align 4, !dbg !20, !tbaa !23
%8 = ptrtoint i32* %p.0.p.0. to i64, !dbg !20
%9 = and i64 %8, -70368744177665, !dbg !20
%10 = inttoptr i64 %9 to i32*, !dbg !20
%_msld2 = load i32, i32* %10, align 4, !dbg !20
%11 = icmp ne i32 %_msld2, 0, !dbg !20
%12 = xor i32 %_msld2, -1, !dbg !20
%13 = and i32 %7, %12, !dbg !20
%14 = icmp eq i32 %13, 0, !dbg !20
%_msprop_icmp = and i1 %11, %14, !dbg !20
br i1 %_msprop_icmp, label %15, label %16, !dbg !20, !prof !27
; <label>:15 ; preds = %6
call void @__msan_warning_noreturn(), !dbg !20
call void asm sideeffect "", ""() #3, !dbg !20
unreachable, !dbg !20
; <label>:16 ; preds = %6
%tobool = icmp eq i32 %7, 0, !dbg !20
br i1 %tobool, label %if.end, label %if.then, !dbg !20
if.then: ; preds = %16
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !28
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !28
%puts = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str, i64 0, i64 0)), !dbg !28
br label %if.end, !dbg !28
if.end: ; preds = %16, %if.then
ret void, !dbg !29
}
; Function Attrs: nobuiltin
declare i8* @_Znwm(i64) #1
; Function Attrs: sanitize_memory uwtable
define i32 @main() #0 !dbg !13 {
entry:
%p.i = alloca i32*, align 8
%0 = ptrtoint i32** %p.i to i64, !dbg !30
%1 = and i64 %0, -70368744177672, !dbg !30
%2 = inttoptr i64 %1 to i64*, !dbg !30
store i64 -1, i64* %2, align 8, !dbg !30
%p.i.0..sroa_cast = bitcast i32** %p.i to i8*, !dbg !30
call void @llvm.lifetime.start(i64 8, i8* %p.i.0..sroa_cast), !dbg !30
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !30
store i64 0, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
%call.i = call i8* @_Znwm(i64 4) #4, !dbg !30
%_msret = load i64, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
%3 = bitcast i8* %call.i to i32*, !dbg !30
tail call void @llvm.dbg.value(metadata i32* %3, metadata !32, metadata !DIExpression()), !dbg !30
%4 = inttoptr i64 %1 to i64*, !dbg !30
store i64 %_msret, i64* %4, align 8, !dbg !30
store volatile i32* %3, i32** %p.i, align 8, !dbg !30
tail call void @llvm.dbg.value(metadata i32** %p.i, metadata !32, metadata !DIExpression()), !dbg !30
%p.i.0.p.0.p.0..i = load volatile i32*, i32** %p.i, align 8, !dbg !33
%_msld = load i64, i64* %4, align 8, !dbg !33
%_mscmp = icmp eq i64 %_msld, 0, !dbg !33
br i1 %_mscmp, label %6, label %5, !dbg !33, !prof !22
; <label>:5 ; preds = %entry
call void @__msan_warning_noreturn(), !dbg !33
call void asm sideeffect "", ""() #3, !dbg !33
unreachable, !dbg !33
; <label>:6 ; preds = %entry
%7 = load i32, i32* %p.i.0.p.0.p.0..i, align 4, !dbg !33, !tbaa !23
%8 = ptrtoint i32* %p.i.0.p.0.p.0..i to i64, !dbg !33
%9 = and i64 %8, -70368744177665, !dbg !33
%10 = inttoptr i64 %9 to i32*, !dbg !33
%_msld2 = load i32, i32* %10, align 4, !dbg !33
%11 = icmp ne i32 %_msld2, 0, !dbg !33
%12 = xor i32 %_msld2, -1, !dbg !33
%13 = and i32 %7, %12, !dbg !33
%14 = icmp eq i32 %13, 0, !dbg !33
%_msprop_icmp = and i1 %11, %14, !dbg !33
br i1 %_msprop_icmp, label %15, label %16, !dbg !33, !prof !27
; <label>:15 ; preds = %6
call void @__msan_warning_noreturn(), !dbg !33
call void asm sideeffect "", ""() #3, !dbg !33
unreachable, !dbg !33
; <label>:16 ; preds = %6
%tobool.i = icmp eq i32 %7, 0, !dbg !33
br i1 %tobool.i, label %_Z1fv.exit, label %if.then.i, !dbg !33
if.then.i: ; preds = %16
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !34
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !34
%puts.i = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str, i64 0, i64 0)), !dbg !34
br label %_Z1fv.exit, !dbg !34
_Z1fv.exit: ; preds = %16, %if.then.i
call void @llvm.lifetime.end(i64 8, i8* %p.i.0..sroa_cast), !dbg !35
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !36
ret i32 0, !dbg !36
}
declare void @__msan_init()
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
; Function Attrs: nounwind
declare i32 @puts(i8* nocapture readonly) #3
; Function Attrs: nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) #3
; Function Attrs: nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) #3
declare void @__msan_warning_noreturn()
declare void @__msan_maybe_warning_1(i8, i32)
declare void @__msan_maybe_store_origin_1(i8, i8*, i32)
declare void @__msan_maybe_warning_2(i16, i32)
declare void @__msan_maybe_store_origin_2(i16, i8*, i32)
declare void @__msan_maybe_warning_4(i32, i32)
declare void @__msan_maybe_store_origin_4(i32, i8*, i32)
declare void @__msan_maybe_warning_8(i64, i32)
declare void @__msan_maybe_store_origin_8(i64, i8*, i32)
declare void @__msan_set_alloca_origin4(i8*, i64, i8*, i64)
declare void @__msan_poison_stack(i8*, i64)
declare i32 @__msan_chain_origin(i32)
declare i8* @__msan_memmove(i8*, i8*, i64)
declare i8* @__msan_memcpy(i8*, i8*, i64)
declare i8* @__msan_memset(i8*, i32, i64)
; Function Attrs: nounwind
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #3
attributes #0 = { sanitize_memory uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nobuiltin "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
attributes #4 = { builtin }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!4 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !6, retainedNodes: !8)
!5 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/echristo/tmp")
!6 = !DISubroutineType(types: !7)
!7 = !{null}
!8 = !{!9}
!9 = !DILocalVariable(name: "p", line: 4, scope: !4, file: !5, type: !10)
!10 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !11)
!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !12)
!12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = distinct !DISubprogram(name: "main", line: 9, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 9, file: !1, scope: !5, type: !14, retainedNodes: !2)
!14 = !DISubroutineType(types: !15)
!15 = !{!12}
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 1, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)"}
!19 = !DILocation(line: 4, scope: !4)
!20 = !DILocation(line: 5, scope: !21)
!21 = distinct !DILexicalBlock(line: 5, column: 0, file: !1, scope: !4)
!22 = !{!"branch_weights", i32 1000, i32 1}
!23 = !{!24, !24, i64 0}
!24 = !{!"int", !25, i64 0}
!25 = !{!"omnipotent char", !26, i64 0}
!26 = !{!"Simple C/C++ TBAA"}
!27 = !{!"branch_weights", i32 1, i32 1000}
!28 = !DILocation(line: 6, scope: !21)
!29 = !DILocation(line: 7, scope: !4)
!30 = !DILocation(line: 4, scope: !4, inlinedAt: !31)
!31 = !DILocation(line: 10, scope: !13)
!32 = !DILocalVariable(name: "p", line: 4, scope: !4, file: !5, type: !10)
!33 = !DILocation(line: 5, scope: !21, inlinedAt: !31)
!34 = !DILocation(line: 6, scope: !21, inlinedAt: !31)
!35 = !DILocation(line: 7, scope: !4, inlinedAt: !31)
!36 = !DILocation(line: 11, scope: !13)
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