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llvm-mirror/test/DebugInfo/X86/nophysreg.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

203 lines
9.2 KiB
LLVM
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; RUN: llc -filetype=obj < %s | llvm-dwarfdump -debug-info - | FileCheck %s
;
; PR22296: In this testcase the DBG_VALUE describing "p5" becomes unavailable
; because the register its address is in is clobbered and we (currently) aren't
; smart enough to realize that the value is rematerialized immediately after the
; DBG_VALUE and/or is actually a stack slot.
;
; Test that we handle this situation gracefully by omitting the DW_AT_location
; and not asserting.
; Note that this check may XPASS in the future if DbgValueHistoryCalculator
; becoms smarter. That would be fine, too.
;
; CHECK: DW_TAG_subprogram
; CHECK: linkage_name{{.*}}_Z2f21A
; CHECK: DW_TAG_formal_parameter
; CHECK-NOT: DW_AT_location
; CHECK-NEXT: DW_AT_name {{.*}}"p5"
;
; // Compile at -O1
; struct A {
; int *m1;
; int m2;
; };
;
; void f1(int *p1, int p2);
; void __attribute__((always_inline)) f2(A p5) { f1(p5.m1, p5.m2); }
;
; void func(void*);
; void func(const int &, const int&);
; int cond();
; void f() {
; while (cond()) {
; int x;
; func(x, 0);
; while (cond()) {
; char y;
; func(&y);
; char j;
; func(&j);
; char I;
; func(&I);
; func(0, 0);
; A g;
; g.m1 = &x;
; f2(g);
; }
; }
; }
; ModuleID = 'test.cpp'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
%struct.A = type { i32*, i32 }
; Function Attrs: alwaysinline ssp uwtable
define void @_Z2f21A(i32* %p5.coerce0, i32 %p5.coerce1) #0 !dbg !11 {
entry:
tail call void @llvm.dbg.value(metadata i32* %p5.coerce0, metadata !16, metadata !33), !dbg !34
tail call void @llvm.dbg.value(metadata i32 %p5.coerce1, metadata !16, metadata !35), !dbg !34
tail call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !16, metadata !36), !dbg !34
tail call void @_Z2f1Pii(i32* %p5.coerce0, i32 %p5.coerce1), !dbg !37
ret void, !dbg !38
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @_Z2f1Pii(i32*, i32) #2
; Function Attrs: ssp uwtable
define void @_Z1fv() #3 !dbg !17 {
entry:
%x = alloca i32, align 4
%ref.tmp = alloca i32, align 4
%y = alloca i8, align 1
%j = alloca i8, align 1
%I = alloca i8, align 1
%ref.tmp5 = alloca i32, align 4
%ref.tmp6 = alloca i32, align 4
%call11 = call i32 @_Z4condv(), !dbg !39
%tobool12 = icmp eq i32 %call11, 0, !dbg !39
br i1 %tobool12, label %while.end7, label %while.body, !dbg !40
while.cond.loopexit: ; preds = %while.body4, %while.body
%call = call i32 @_Z4condv(), !dbg !39
%tobool = icmp eq i32 %call, 0, !dbg !39
br i1 %tobool, label %while.end7, label %while.body, !dbg !40
while.body: ; preds = %entry, %while.cond.loopexit
store i32 0, i32* %ref.tmp, align 4, !dbg !41, !tbaa !42
call void @llvm.dbg.value(metadata i32* %x, metadata !21, metadata !DIExpression(DW_OP_deref)), !dbg !46
call void @_Z4funcRKiS0_(i32* dereferenceable(4) %x, i32* dereferenceable(4) %ref.tmp), !dbg !47
%call29 = call i32 @_Z4condv(), !dbg !48
%tobool310 = icmp eq i32 %call29, 0, !dbg !48
br i1 %tobool310, label %while.cond.loopexit, label %while.body4, !dbg !49
while.body4: ; preds = %while.body, %while.body4
call void @llvm.dbg.value(metadata i8* %y, metadata !23, metadata !DIExpression(DW_OP_deref)), !dbg !50
call void @_Z4funcPv(i8* %y), !dbg !51
call void @llvm.dbg.value(metadata i8* %j, metadata !26, metadata !DIExpression(DW_OP_deref)), !dbg !52
call void @_Z4funcPv(i8* %j), !dbg !53
call void @llvm.dbg.value(metadata i8* %I, metadata !27, metadata !DIExpression(DW_OP_deref)), !dbg !54
call void @_Z4funcPv(i8* %I), !dbg !55
store i32 0, i32* %ref.tmp5, align 4, !dbg !56, !tbaa !42
store i32 0, i32* %ref.tmp6, align 4, !dbg !57, !tbaa !42
call void @_Z4funcRKiS0_(i32* dereferenceable(4) %ref.tmp5, i32* dereferenceable(4) %ref.tmp6), !dbg !58
call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !28, metadata !36), !dbg !59
call void @llvm.dbg.value(metadata i32* %x, metadata !28, metadata !33), !dbg !59
call void @llvm.dbg.value(metadata i32* %x, metadata !21, metadata !DIExpression(DW_OP_deref)), !dbg !46
call void @llvm.dbg.value(metadata i32* %x, metadata !60, metadata !33), !dbg !62
call void @llvm.dbg.value(metadata i32 undef, metadata !60, metadata !35), !dbg !62
call void @llvm.dbg.declare(metadata %struct.A* undef, metadata !60, metadata !36), !dbg !62
call void @_Z2f1Pii(i32* %x, i32 undef), !dbg !63
%call2 = call i32 @_Z4condv(), !dbg !48
%tobool3 = icmp eq i32 %call2, 0, !dbg !48
br i1 %tobool3, label %while.cond.loopexit, label %while.body4, !dbg !49
while.end7: ; preds = %while.cond.loopexit, %entry
ret void, !dbg !64
}
declare i32 @_Z4condv()
declare void @_Z4funcRKiS0_(i32* dereferenceable(4), i32* dereferenceable(4))
declare void @_Z4funcPv(i8*)
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { alwaysinline ssp uwtable }
attributes #1 = { nounwind readnone }
attributes #3 = { ssp uwtable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!29, !30, !31}
!llvm.ident = !{!32}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.7.0 (trunk 227088) (llvm/trunk 227091)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
!1 = !DIFile(filename: "test.cpp", directory: "")
!2 = !{}
!3 = !{!4}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, size: 128, align: 64, file: !1, elements: !5, identifier: "_ZTS1A")
!5 = !{!6, !9}
!6 = !DIDerivedType(tag: DW_TAG_member, name: "m1", line: 2, size: 64, align: 64, file: !1, scope: !4, baseType: !7)
!7 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, 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: "m2", line: 3, size: 32, align: 32, offset: 64, file: !1, scope: !4, baseType: !8)
!11 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f21A", line: 7, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 7, file: !1, scope: !12, type: !13, retainedNodes: !15)
!12 = !DIFile(filename: "test.cpp", directory: "")
!13 = !DISubroutineType(types: !14)
!14 = !{null, !4}
!15 = !{!16}
!16 = !DILocalVariable(name: "p5", line: 7, arg: 1, scope: !11, file: !12, type: !4)
!17 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", line: 12, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 12, file: !1, scope: !12, type: !18, retainedNodes: !20)
!18 = !DISubroutineType(types: !19)
!19 = !{null}
!20 = !{!21, !23, !26, !27, !28}
!21 = !DILocalVariable(name: "x", line: 14, scope: !22, file: !12, type: !8)
!22 = distinct !DILexicalBlock(line: 13, column: 18, file: !1, scope: !17)
!23 = !DILocalVariable(name: "y", line: 17, scope: !24, file: !12, type: !25)
!24 = distinct !DILexicalBlock(line: 16, column: 20, file: !1, scope: !22)
!25 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!26 = !DILocalVariable(name: "j", line: 19, scope: !24, file: !12, type: !25)
!27 = !DILocalVariable(name: "I", line: 21, scope: !24, file: !12, type: !25)
!28 = !DILocalVariable(name: "g", line: 24, scope: !24, file: !12, type: !4)
!29 = !{i32 2, !"Dwarf Version", i32 2}
!30 = !{i32 2, !"Debug Info Version", i32 3}
!31 = !{i32 1, !"PIC Level", i32 2}
!32 = !{!"clang version 3.7.0 (trunk 227088) (llvm/trunk 227091)"}
!33 = !DIExpression(DW_OP_LLVM_fragment, 0, 8)
!34 = !DILocation(line: 7, column: 42, scope: !11)
!35 = !DIExpression(DW_OP_LLVM_fragment, 8, 4)
!36 = !DIExpression()
!37 = !DILocation(line: 7, column: 48, scope: !11)
!38 = !DILocation(line: 7, column: 66, scope: !11)
!39 = !DILocation(line: 13, column: 10, scope: !17)
!40 = !DILocation(line: 13, column: 3, scope: !17)
!41 = !DILocation(line: 15, column: 13, scope: !22)
!42 = !{!43, !43, i64 0}
!43 = !{!"int", !44, i64 0}
!44 = !{!"omnipotent char", !45, i64 0}
!45 = !{!"Simple C/C++ TBAA"}
!46 = !DILocation(line: 14, column: 9, scope: !22)
!47 = !DILocation(line: 15, column: 5, scope: !22)
!48 = !DILocation(line: 16, column: 12, scope: !22)
!49 = !DILocation(line: 16, column: 5, scope: !22)
!50 = !DILocation(line: 17, column: 12, scope: !24)
!51 = !DILocation(line: 18, column: 7, scope: !24)
!52 = !DILocation(line: 19, column: 12, scope: !24)
!53 = !DILocation(line: 20, column: 7, scope: !24)
!54 = !DILocation(line: 21, column: 12, scope: !24)
!55 = !DILocation(line: 22, column: 7, scope: !24)
!56 = !DILocation(line: 23, column: 12, scope: !24)
!57 = !DILocation(line: 23, column: 15, scope: !24)
!58 = !DILocation(line: 23, column: 7, scope: !24)
!59 = !DILocation(line: 24, column: 9, scope: !24)
!60 = !DILocalVariable(name: "p5", line: 7, arg: 1, scope: !11, file: !12, type: !4)
!61 = distinct !DILocation(line: 26, column: 7, scope: !24)
!62 = !DILocation(line: 7, column: 42, scope: !11, inlinedAt: !61)
!63 = !DILocation(line: 7, column: 48, scope: !11, inlinedAt: !61)
!64 = !DILocation(line: 29, column: 1, scope: !17)
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