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https://github.com/RPCS3/llvm-mirror.git
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a2029fa58e
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
275 lines
12 KiB
LLVM
275 lines
12 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s
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; This isn't a very pretty test case - I imagine there might be other ways to
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; tickle the optimizers into producing the desired code, but I haven't found
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; them.
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; The issue is when a function is inlined into itself, the inlined argument
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; accidentally overwrote the concrete argument and was lost.
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; IR generated from the following source compiled with clang -g:
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; void fn1(void *);
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; void fn2(int, int, int, int);
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; void fn3();
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; void fn8();
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; struct C {
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; int b;
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; void m_fn2() {
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; fn8();
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; if (b) fn2(0, 0, 0, 0);
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; fn3();
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; }
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; };
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; C *x;
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; inline void fn7() {}
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; void fn6() {
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; fn8();
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; x->m_fn2();
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; fn7();
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; }
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; void fn3() { fn6(); }
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; void fn4() { x->m_fn2(); }
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; void fn5() { x->m_fn2(); }
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; The definition of C and declaration of C::m_fn2
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; CHECK: DW_TAG_structure_type
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_member
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "m_fn2"
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; The abstract definition of C::m_fn2
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; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_specification {{.*}} {[[M_FN2_DECL]]}
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_inline
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}} "this"
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; Skip some other functions
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_TAG_subprogram
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; The concrete definition of C::m_fn2
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
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; CHECK-NOT: {{DW_TAG|NULL}}
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; Inlined fn3:
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NOT: {{DW_TAG|NULL}}
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; Inlined fn6:
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NOT: {{DW_TAG|NULL}}
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; Inlined C::m_fn2:
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
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source_filename = "test/DebugInfo/Generic/recursive_inlining.ll"
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%struct.C = type { i32 }
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@x = global %struct.C* null, align 8, !dbg !0
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; Function Attrs: nounwind
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define void @_Z3fn6v() #0 !dbg !20 {
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entry:
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tail call void @_Z3fn8v() #3, !dbg !23
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%0 = load %struct.C*, %struct.C** @x, align 8, !dbg !24, !tbaa !25
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tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !33
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tail call void @_Z3fn8v() #3, !dbg !34
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%b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !35
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%1 = load i32, i32* %b.i, align 4, !dbg !35, !tbaa !37
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%tobool.i = icmp eq i32 %1, 0, !dbg !35
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br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !35
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if.then.i: ; preds = %entry
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tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !40
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br label %_ZN1C5m_fn2Ev.exit, !dbg !40
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_ZN1C5m_fn2Ev.exit: ; preds = %if.then.i, %entry
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tail call void @_Z3fn3v() #3, !dbg !42
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ret void, !dbg !43
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}
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declare void @_Z3fn8v() #1
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; Function Attrs: nounwind
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define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !30 {
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entry:
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tail call void @llvm.dbg.value(metadata %struct.C* %this, metadata !29, metadata !32), !dbg !44
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tail call void @_Z3fn8v() #3, !dbg !45
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%b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !46
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%0 = load i32, i32* %b, align 4, !dbg !46, !tbaa !37
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%tobool = icmp eq i32 %0, 0, !dbg !46
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br i1 %tobool, label %if.end, label %if.then, !dbg !46
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if.then: ; preds = %entry
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tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47
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br label %if.end, !dbg !47
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if.end: ; preds = %if.then, %entry
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tail call void @_Z3fn8v() #3, !dbg !48
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%1 = load %struct.C*, %struct.C** @x, align 8, !dbg !52, !tbaa !25
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tail call void @llvm.dbg.value(metadata %struct.C* %1, metadata !29, metadata !32) #3, !dbg !53
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tail call void @_Z3fn8v() #3, !dbg !54
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%b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !55
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%2 = load i32, i32* %b.i.i, align 4, !dbg !55, !tbaa !37
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%tobool.i.i = icmp eq i32 %2, 0, !dbg !55
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br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55
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if.then.i.i: ; preds = %if.end
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tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56
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br label %_Z3fn6v.exit, !dbg !56
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_Z3fn6v.exit: ; preds = %if.then.i.i, %if.end
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tail call void @_Z3fn3v() #3, !dbg !57
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ret void, !dbg !58
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}
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; Function Attrs: nounwind
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define void @_Z3fn3v() #0 !dbg !50 {
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entry:
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br label %tailrecurse
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tailrecurse: ; preds = %tailrecurse.backedge, %entry
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tail call void @_Z3fn8v() #3, !dbg !59
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%0 = load %struct.C*, %struct.C** @x, align 8, !dbg !61, !tbaa !25
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tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !62
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tail call void @_Z3fn8v() #3, !dbg !63
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%b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !64
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%1 = load i32, i32* %b.i.i, align 4, !dbg !64, !tbaa !37
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%tobool.i.i = icmp eq i32 %1, 0, !dbg !64
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br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64
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tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse
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br label %tailrecurse
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if.then.i.i: ; preds = %tailrecurse
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tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65
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br label %tailrecurse.backedge, !dbg !65
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}
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; Function Attrs: nounwind
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define void @_Z3fn4v() #0 !dbg !66 {
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entry:
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%0 = load %struct.C*, %struct.C** @x, align 8, !dbg !67, !tbaa !25
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tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !67
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ret void, !dbg !67
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}
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; Function Attrs: nounwind
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define void @_Z3fn5v() #0 !dbg !68 {
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entry:
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%0 = load %struct.C*, %struct.C** @x, align 8, !dbg !69, !tbaa !25
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tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !69
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ret void, !dbg !69
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}
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declare void @_Z3fn2iiii(i32, i32, i32, i32) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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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 = !{!12}
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!llvm.module.flags = !{!17, !18}
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!llvm.ident = !{!19}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true)
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!2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
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!3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64)
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C")
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!5 = !{!6, !8}
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32)
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: false, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null, !11}
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !13, producer: "clang version 3.6.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !14, retainedTypes: !15, globals: !16, imports: !14)
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!13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
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!14 = !{}
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!15 = !{!4}
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!16 = !{!0}
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!17 = !{i32 2, !"Dwarf Version", i32 4}
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!18 = !{i32 2, !"Debug Info Version", i32 3}
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!19 = !{!"clang version 3.6.0 "}
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!20 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", scope: !2, file: !2, line: 15, type: !21, isLocal: false, isDefinition: true, scopeLine: 15, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
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!21 = !DISubroutineType(types: !22)
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!22 = !{null}
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!23 = !DILocation(line: 16, scope: !20)
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!24 = !DILocation(line: 17, scope: !20)
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!25 = !{!26, !26, i64 0}
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!26 = !{!"any pointer", !27, i64 0}
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!27 = !{!"omnipotent char", !28, i64 0}
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!28 = !{!"Simple C/C++ TBAA"}
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!29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer)
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!30 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, declaration: !8, retainedNodes: !31)
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!31 = !{!29}
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!32 = !DIExpression()
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!33 = !DILocation(line: 0, scope: !30, inlinedAt: !24)
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!34 = !DILocation(line: 8, scope: !30, inlinedAt: !24)
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!35 = !DILocation(line: 9, scope: !36, inlinedAt: !24)
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!36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9)
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!37 = !{!38, !39, i64 0}
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!38 = !{!"struct", !39, i64 0}
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!39 = !{!"int", !27, i64 0}
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!40 = !DILocation(line: 9, scope: !41, inlinedAt: !24)
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!41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9)
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!42 = !DILocation(line: 10, scope: !30, inlinedAt: !24)
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!43 = !DILocation(line: 19, scope: !20)
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!44 = !DILocation(line: 0, scope: !30)
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!45 = !DILocation(line: 8, scope: !30)
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!46 = !DILocation(line: 9, scope: !36)
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!47 = !DILocation(line: 9, scope: !41)
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!48 = !DILocation(line: 16, scope: !20, inlinedAt: !49)
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!49 = !DILocation(line: 20, scope: !50, inlinedAt: !51)
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!50 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", scope: !2, file: !2, line: 20, type: !21, isLocal: false, isDefinition: true, scopeLine: 20, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
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!51 = !DILocation(line: 10, scope: !30)
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!52 = !DILocation(line: 17, scope: !20, inlinedAt: !49)
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!53 = !DILocation(line: 0, scope: !30, inlinedAt: !52)
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!54 = !DILocation(line: 8, scope: !30, inlinedAt: !52)
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!55 = !DILocation(line: 9, scope: !36, inlinedAt: !52)
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!56 = !DILocation(line: 9, scope: !41, inlinedAt: !52)
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!57 = !DILocation(line: 10, scope: !30, inlinedAt: !52)
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!58 = !DILocation(line: 11, scope: !30)
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!59 = !DILocation(line: 16, scope: !20, inlinedAt: !60)
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!60 = !DILocation(line: 20, scope: !50)
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!61 = !DILocation(line: 17, scope: !20, inlinedAt: !60)
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!62 = !DILocation(line: 0, scope: !30, inlinedAt: !61)
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!63 = !DILocation(line: 8, scope: !30, inlinedAt: !61)
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!64 = !DILocation(line: 9, scope: !36, inlinedAt: !61)
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!65 = !DILocation(line: 9, scope: !41, inlinedAt: !61)
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!66 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", scope: !2, file: !2, line: 21, type: !21, isLocal: false, isDefinition: true, scopeLine: 21, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
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!67 = !DILocation(line: 21, scope: !66)
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!68 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", scope: !2, file: !2, line: 22, type: !21, isLocal: false, isDefinition: true, scopeLine: 22, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14)
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!69 = !DILocation(line: 22, scope: !68)
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