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llvm/test/DebugInfo/X86/vla-multi.ll
Shiva Chen a8a13bc662 [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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331841 91177308-0d34-0410-b5e6-96231b3b80d8
2018-05-09 02:40:45 +00:00

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; RUN: llc -mtriple=x86_64-apple-darwin %s -o - -filetype=obj | llvm-dwarfdump - | FileCheck %s
; Test debug info for multidimensional arrays.
;
; void f(int i, int j, int k, int r) {
; int tensor1[i][j][k][r];
; int tensor2[i][j][k][r];
; use(tensor1, tensor2);
;}
;
; CHECK: DW_TAG_array_type
; CHECK-NEXT: DW_AT_type (0x000000f8 "int")
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}}"__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK: DW_TAG_array_type
; CHECK-NEXT: DW_AT_type (0x000000f8 "int")
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}}"__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
; CHECK-NOT: TAG
; CHECK: DW_TAG_subrange_type
; CHECK-NEXT: DW_AT_type (0x{{.*}} "__ARRAY_SIZE_TYPE__")
; CHECK-NEXT: DW_AT_count (0x{{.*}})
source_filename = "/tmp/test.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.13.0"
define void @f(i32 %i, i32 %j, i32 %k, i32 %r) !dbg !8 {
entry:
call void @llvm.dbg.value(metadata i32 %i, metadata !39, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %j, metadata !38, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %k, metadata !37, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %r, metadata !36, metadata !DIExpression()), !dbg !40
%0 = zext i32 %i to i64, !dbg !40
%1 = zext i32 %j to i64, !dbg !40
%2 = zext i32 %k to i64, !dbg !40
%3 = zext i32 %r to i64, !dbg !40
%4 = mul nuw i64 %1, %0, !dbg !40
%5 = mul nuw i64 %4, %2, !dbg !40
%6 = mul nuw i64 %5, %3, !dbg !40
%vla = alloca i32, i64 %6, align 16, !dbg !40
call void @llvm.dbg.declare(metadata i32* %vla, metadata !25, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.declare(metadata i32* %vla4, metadata !13, metadata !DIExpression()), !dbg !40
%vla4 = alloca i32, i64 %6, align 16, !dbg !40
call void @llvm.dbg.value(metadata i32 %i, metadata !29, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %j, metadata !31, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %k, metadata !33, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %r, metadata !35, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %i, metadata !17, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %j, metadata !20, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i32 %k, metadata !22, metadata !DIExpression()), !dbg !40
call void @llvm.dbg.value(metadata i64 %3, metadata !24, metadata !DIExpression()), !dbg !40
%call = call i32 (i32*, i32*, ...) bitcast (i32 (...)* @use to i32 (i32*, i32*, ...)*)(i32* nonnull %vla, i32* nonnull %vla4) #1, !dbg !40
ret void, !dbg !40
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
declare i32 @use(...) local_unnamed_addr
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
attributes #0 = { nounwind readnone speculatable }
attributes #1 = { minsize nounwind optsize }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 324259) (llvm/trunk 324261)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "/tmp/test.c", directory: "/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 7.0.0 (trunk 324259) (llvm/trunk 324261)"}
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11, !11, !11, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{!13, !24, !22, !20, !17, !25, !35, !33, !31, !29, !36, !37, !38, !39}
!13 = !DILocalVariable(name: "tensor2", scope: !8, file: !1, line: 3, type: !14)
!14 = !DICompositeType(tag: DW_TAG_array_type, baseType: !11, elements: !15)
!15 = !{!16, !19, !21, !23}
!16 = !DISubrange(count: !17)
!17 = !DILocalVariable(name: "vla_expr5", scope: !8, file: !1, line: 3, type: !18)
!18 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!19 = !DISubrange(count: !20)
!20 = !DILocalVariable(name: "vla_expr6", scope: !8, file: !1, line: 3, type: !18)
!21 = !DISubrange(count: !22)
!22 = !DILocalVariable(name: "vla_expr7", scope: !8, file: !1, line: 3, type: !18)
!23 = !DISubrange(count: !24)
!24 = !DILocalVariable(name: "vla_expr8", scope: !8, file: !1, line: 3, type: !18)
!25 = !DILocalVariable(name: "tensor1", scope: !8, file: !1, line: 2, type: !26)
!26 = !DICompositeType(tag: DW_TAG_array_type, baseType: !11, elements: !27)
!27 = !{!28, !30, !32, !34}
!28 = !DISubrange(count: !29)
!29 = !DILocalVariable(name: "vla_expr", scope: !8, file: !1, line: 2, type: !18)
!30 = !DISubrange(count: !31)
!31 = !DILocalVariable(name: "vla_expr1", scope: !8, file: !1, line: 2, type: !18)
!32 = !DISubrange(count: !33)
!33 = !DILocalVariable(name: "vla_expr2", scope: !8, file: !1, line: 2, type: !18)
!34 = !DISubrange(count: !35)
!35 = !DILocalVariable(name: "vla_expr3", scope: !8, file: !1, line: 2, type: !18)
!36 = !DILocalVariable(name: "r", arg: 4, scope: !8, file: !1, line: 1, type: !11)
!37 = !DILocalVariable(name: "k", arg: 3, scope: !8, file: !1, line: 1, type: !11)
!38 = !DILocalVariable(name: "j", arg: 2, scope: !8, file: !1, line: 1, type: !11)
!39 = !DILocalVariable(name: "i", arg: 1, scope: !8, file: !1, line: 1, type: !11)
!40 = !DILocation(line: 2, column: 3, scope: !8)
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