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llvm-6502/test/CodeGen/X86/dbg-changes-codegen-branch-folding.ll
Duncan P. N. Exon Smith b056aa798d DebugInfo: Move new hierarchy into place 
Move the specialized metadata nodes for the new debug info hierarchy
into place, finishing off PR22464.  I've done bootstraps (and all that)
and I'm confident this commit is NFC as far as DWARF output is
concerned.  Let me know if I'm wrong :).

The code changes are fairly mechanical:

  - Bumped the "Debug Info Version".
  - `DIBuilder` now creates the appropriate subclass of `MDNode`.
  - Subclasses of DIDescriptor now expect to hold their "MD"
    counterparts (e.g., `DIBasicType` expects `MDBasicType`).
  - Deleted a ton of dead code in `AsmWriter.cpp` and `DebugInfo.cpp`
    for printing comments.
  - Big update to LangRef to describe the nodes in the new hierarchy.
    Feel free to make it better.

Testcase changes are enormous.  There's an accompanying clang commit on
its way.

If you have out-of-tree debug info testcases, I just broke your build.

  - `upgrade-specialized-nodes.sh` is attached to PR22564.  I used it to
    update all the IR testcases.
  - Unfortunately I failed to find way to script the updates to CHECK
    lines, so I updated all of these by hand.  This was fairly painful,
    since the old CHECKs are difficult to reason about.  That's one of
    the benefits of the new hierarchy.

This work isn't quite finished, BTW.  The `DIDescriptor` subclasses are
almost empty wrappers, but not quite: they still have loose casting
checks (see the `RETURN_FROM_RAW()` macro).  Once they're completely
gutted, I'll rename the "MD" classes to "DI" and kill the wrappers.  I
also expect to make a few schema changes now that it's easier to reason
about everything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231082 91177308-0d34-0410-b5e6-96231b3b80d8
2015-03-03 17:24:31 +00:00

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; RUN: llc -march=x86-64 -mtriple=x86_64-linux < %s | FileCheck %s
; RUN: opt -strip-debug < %s | llc -march=x86-64 -mtriple=x86_64-linux | FileCheck %s
; http://llvm.org/PR19051. Minor code-motion difference with -g.
; Presence of debug info shouldn't affect the codegen. Make sure that
; we generated the same code sequence with and without debug info.
;
; CHECK: callq _Z3fooPcjPKc
; CHECK: callq _Z3fooPcjPKc
; CHECK: leaq (%rsp), %rdi
; CHECK: movl $4, %esi
; CHECK: testl {{%[a-z]+}}, {{%[a-z]+}}
; CHECK: je .LBB0_4
; Regenerate test with this command:
; clang -emit-llvm -S -O2 -g
; from this source:
;
; extern void foo(char *dst,unsigned siz,const char *src);
; extern const char * i2str(int);
;
; struct AAA3 {
; AAA3(const char *value) { foo(text,sizeof(text),value);}
; void operator=(const char *value) { foo(text,sizeof(text),value);}
; operator const char*() const { return text;}
; char text[4];
; };
;
; void bar (int param1,int param2) {
; const char * temp(0);
;
; if (param2) {
; temp = i2str(param2);
; }
; AAA3 var1("");
; AAA3 var2("");
;
; if (param1)
; var2 = "+";
; else
; var2 = "-";
; var1 = "";
; }
%struct.AAA3 = type { [4 x i8] }
@.str = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
@.str1 = private unnamed_addr constant [2 x i8] c"+\00", align 1
@.str2 = private unnamed_addr constant [2 x i8] c"-\00", align 1
; Function Attrs: uwtable
define void @_Z3barii(i32 %param1, i32 %param2) #0 {
entry:
%var1 = alloca %struct.AAA3, align 1
%var2 = alloca %struct.AAA3, align 1
tail call void @llvm.dbg.value(metadata i32 %param1, i64 0, metadata !30, metadata !MDExpression()), !dbg !47
tail call void @llvm.dbg.value(metadata i32 %param2, i64 0, metadata !31, metadata !MDExpression()), !dbg !47
tail call void @llvm.dbg.value(metadata i8* null, i64 0, metadata !32, metadata !MDExpression()), !dbg !49
%tobool = icmp eq i32 %param2, 0, !dbg !50
br i1 %tobool, label %if.end, label %if.then, !dbg !50
if.then: ; preds = %entry
%call = tail call i8* @_Z5i2stri(i32 %param2), !dbg !52
tail call void @llvm.dbg.value(metadata i8* %call, i64 0, metadata !32, metadata !MDExpression()), !dbg !49
br label %if.end, !dbg !54
if.end: ; preds = %entry, %if.then
tail call void @llvm.dbg.value(metadata %struct.AAA3* %var1, i64 0, metadata !33, metadata !MDExpression()), !dbg !55
tail call void @llvm.dbg.value(metadata %struct.AAA3* %var1, i64 0, metadata !56, metadata !MDExpression()), !dbg !57
tail call void @llvm.dbg.value(metadata !58, i64 0, metadata !59, metadata !MDExpression()), !dbg !60
%arraydecay.i = getelementptr inbounds %struct.AAA3, %struct.AAA3* %var1, i64 0, i32 0, i64 0, !dbg !61
call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !61
call void @llvm.dbg.value(metadata %struct.AAA3* %var2, i64 0, metadata !34, metadata !MDExpression()), !dbg !63
call void @llvm.dbg.value(metadata %struct.AAA3* %var2, i64 0, metadata !64, metadata !MDExpression()), !dbg !65
call void @llvm.dbg.value(metadata !58, i64 0, metadata !66, metadata !MDExpression()), !dbg !67
%arraydecay.i5 = getelementptr inbounds %struct.AAA3, %struct.AAA3* %var2, i64 0, i32 0, i64 0, !dbg !68
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !68
%tobool1 = icmp eq i32 %param1, 0, !dbg !69
call void @llvm.dbg.value(metadata %struct.AAA3* %var2, i64 0, metadata !34, metadata !MDExpression()), !dbg !63
br i1 %tobool1, label %if.else, label %if.then2, !dbg !69
if.then2: ; preds = %if.end
call void @llvm.dbg.value(metadata %struct.AAA3* %var2, i64 0, metadata !71, metadata !MDExpression()), !dbg !73
call void @llvm.dbg.value(metadata !74, i64 0, metadata !75, metadata !MDExpression()), !dbg !76
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)), !dbg !76
br label %if.end3, !dbg !72
if.else: ; preds = %if.end
call void @llvm.dbg.value(metadata %struct.AAA3* %var2, i64 0, metadata !77, metadata !MDExpression()), !dbg !79
call void @llvm.dbg.value(metadata !80, i64 0, metadata !81, metadata !MDExpression()), !dbg !82
call void @_Z3fooPcjPKc(i8* %arraydecay.i5, i32 4, i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)), !dbg !82
br label %if.end3
if.end3: ; preds = %if.else, %if.then2
call void @llvm.dbg.value(metadata %struct.AAA3* %var1, i64 0, metadata !33, metadata !MDExpression()), !dbg !55
call void @llvm.dbg.value(metadata %struct.AAA3* %var1, i64 0, metadata !83, metadata !MDExpression()), !dbg !85
call void @llvm.dbg.value(metadata !58, i64 0, metadata !86, metadata !MDExpression()), !dbg !87
call void @_Z3fooPcjPKc(i8* %arraydecay.i, i32 4, i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)), !dbg !87
ret void, !dbg !88
}
declare i8* @_Z5i2stri(i32) #1
declare void @_Z3fooPcjPKc(i8*, i32, i8*) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
attributes #0 = { 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 = { "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 }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!44, !45}
!llvm.ident = !{!46}
!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !23, globals: !2, imports: !2)
!1 = !MDFile(filename: "dbg-changes-codegen-branch-folding.cpp", directory: "/tmp/dbginfo")
!2 = !{}
!3 = !{!4}
!4 = !MDCompositeType(tag: DW_TAG_structure_type, name: "AAA3", line: 4, size: 32, align: 8, file: !1, elements: !5, identifier: "_ZTS4AAA3")
!5 = !{!6, !11, !17, !18}
!6 = !MDDerivedType(tag: DW_TAG_member, name: "text", line: 8, size: 32, align: 8, file: !1, scope: !"_ZTS4AAA3", baseType: !7)
!7 = !MDCompositeType(tag: DW_TAG_array_type, size: 32, align: 8, baseType: !8, elements: !9)
!8 = !MDBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!9 = !{!10}
!10 = !MDSubrange(count: 4)
!11 = !MDSubprogram(name: "AAA3", line: 5, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 5, file: !1, scope: !"_ZTS4AAA3", type: !12)
!12 = !MDSubroutineType(types: !13)
!13 = !{null, !14, !15}
!14 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS4AAA3")
!15 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !16)
!16 = !MDDerivedType(tag: DW_TAG_const_type, baseType: !8)
!17 = !MDSubprogram(name: "operator=", linkageName: "_ZN4AAA3aSEPKc", line: 6, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !"_ZTS4AAA3", type: !12)
!18 = !MDSubprogram(name: "operator const char *", linkageName: "_ZNK4AAA3cvPKcEv", line: 7, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !1, scope: !"_ZTS4AAA3", type: !19)
!19 = !MDSubroutineType(types: !20)
!20 = !{!15, !21}
!21 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !22)
!22 = !MDDerivedType(tag: DW_TAG_const_type, baseType: !"_ZTS4AAA3")
!23 = !{!24, !35, !40}
!24 = !MDSubprogram(name: "bar", linkageName: "_Z3barii", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !1, scope: !25, type: !26, function: void (i32, i32)* @_Z3barii, variables: !29)
!25 = !MDFile(filename: "dbg-changes-codegen-branch-folding.cpp", directory: "/tmp/dbginfo")
!26 = !MDSubroutineType(types: !27)
!27 = !{null, !28, !28}
!28 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!29 = !{!30, !31, !32, !33, !34}
!30 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "param1", line: 11, arg: 1, scope: !24, file: !25, type: !28)
!31 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "param2", line: 11, arg: 2, scope: !24, file: !25, type: !28)
!32 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "temp", line: 12, scope: !24, file: !25, type: !15)
!33 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "var1", line: 17, scope: !24, file: !25, type: !"_ZTS4AAA3")
!34 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "var2", line: 18, scope: !24, file: !25, type: !"_ZTS4AAA3")
!35 = !MDSubprogram(name: "operator=", linkageName: "_ZN4AAA3aSEPKc", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !"_ZTS4AAA3", type: !12, declaration: !17, variables: !36)
!36 = !{!37, !39}
!37 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !35, type: !38)
!38 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS4AAA3")
!39 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 6, arg: 2, scope: !35, file: !25, type: !15)
!40 = !MDSubprogram(name: "AAA3", linkageName: "_ZN4AAA3C2EPKc", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 5, file: !1, scope: !"_ZTS4AAA3", type: !12, declaration: !11, variables: !41)
!41 = !{!42, !43}
!42 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !40, type: !38)
!43 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 5, arg: 2, scope: !40, file: !25, type: !15)
!44 = !{i32 2, !"Dwarf Version", i32 4}
!45 = !{i32 2, !"Debug Info Version", i32 3}
!46 = !{!"clang version 3.5.0 "}
!47 = !MDLocation(line: 11, scope: !24)
!48 = !{i8* null}
!49 = !MDLocation(line: 12, scope: !24)
!50 = !MDLocation(line: 14, scope: !51)
!51 = distinct !MDLexicalBlock(line: 14, column: 0, file: !1, scope: !24)
!52 = !MDLocation(line: 15, scope: !53)
!53 = distinct !MDLexicalBlock(line: 14, column: 0, file: !1, scope: !51)
!54 = !MDLocation(line: 16, scope: !53)
!55 = !MDLocation(line: 17, scope: !24)
!56 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !40, type: !38, inlinedAt: !55)
!57 = !MDLocation(line: 0, scope: !40, inlinedAt: !55)
!58 = !{i8* getelementptr inbounds ([1 x i8]* @.str, i64 0, i64 0)}
!59 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 5, arg: 2, scope: !40, file: !25, type: !15, inlinedAt: !55)
!60 = !MDLocation(line: 5, scope: !40, inlinedAt: !55)
!61 = !MDLocation(line: 5, scope: !62, inlinedAt: !55)
!62 = distinct !MDLexicalBlock(line: 5, column: 0, file: !1, scope: !40)
!63 = !MDLocation(line: 18, scope: !24)
!64 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !40, type: !38, inlinedAt: !63)
!65 = !MDLocation(line: 0, scope: !40, inlinedAt: !63)
!66 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 5, arg: 2, scope: !40, file: !25, type: !15, inlinedAt: !63)
!67 = !MDLocation(line: 5, scope: !40, inlinedAt: !63)
!68 = !MDLocation(line: 5, scope: !62, inlinedAt: !63)
!69 = !MDLocation(line: 20, scope: !70)
!70 = distinct !MDLexicalBlock(line: 20, column: 0, file: !1, scope: !24)
!71 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !35, type: !38, inlinedAt: !72)
!72 = !MDLocation(line: 21, scope: !70)
!73 = !MDLocation(line: 0, scope: !35, inlinedAt: !72)
!74 = !{i8* getelementptr inbounds ([2 x i8]* @.str1, i64 0, i64 0)}
!75 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 6, arg: 2, scope: !35, file: !25, type: !15, inlinedAt: !72)
!76 = !MDLocation(line: 6, scope: !35, inlinedAt: !72)
!77 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !35, type: !38, inlinedAt: !78)
!78 = !MDLocation(line: 23, scope: !70)
!79 = !MDLocation(line: 0, scope: !35, inlinedAt: !78)
!80 = !{i8* getelementptr inbounds ([2 x i8]* @.str2, i64 0, i64 0)}
!81 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 6, arg: 2, scope: !35, file: !25, type: !15, inlinedAt: !78)
!82 = !MDLocation(line: 6, scope: !35, inlinedAt: !78)
!83 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !35, type: !38, inlinedAt: !84)
!84 = !MDLocation(line: 24, scope: !24)
!85 = !MDLocation(line: 0, scope: !35, inlinedAt: !84)
!86 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "value", line: 6, arg: 2, scope: !35, file: !25, type: !15, inlinedAt: !84)
!87 = !MDLocation(line: 6, scope: !35, inlinedAt: !84)
!88 = !MDLocation(line: 25, scope: !24)
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