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llvm-mirror/test/DebugInfo/AArch64/ir-outliner.ll
Andrew Litteken 48bef97e44 [IROutliner] Adding DebugInfo handling for IR Outlined Functions 
This adds support for functions outlined by the IR Outliner to be
recognized by the debugger.  The expected behavior is that it will
skip over the instructions included in that section.  This is due to the
fact that we can not say which of the original locations the
instructions originated from.

These functions will show up in the call stack, but you cannot step
through them.

Reviewers: paquette, vsk, djtodoro

Differential Revision: https://reviews.llvm.org/D87302
2021-06-15 10:57:08 -05:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs
; RUN: opt -verify -iroutliner -ir-outlining-no-cost < %s | \
; RUN: llc -filetype=obj -mtriple=aarch64-- | llvm-dwarfdump - | FileCheck %s
; RUN: opt -S -verify -iroutliner -ir-outlining-no-cost < %s | FileCheck -check-prefix=IRDEBUG %s
; Ensure that the IR Outliner produces valid DWARF debug information when
; creating outlined functions.
; CHECK: DW_TAG_compile_unit
; CHECK-DAG: DW_AT_name ("outline_debug1")
; Check the high address of bar. This is one past the end of bar. It should be
; the beginning of the outlined function.
; CHECK: DW_AT_high_pc ([[ONE_PAST_BAR:0x[a-f0-9]+]])
; CHECK-NEXT: DW_AT_frame_base (DW_OP_reg31 WSP)
; CHECK-NEXT: DW_AT_linkage_name ("outline_debug2")
; CHECK-NEXT: DW_AT_name ("outline_debug2")
; Check the outlined function's DWARF.
; CHECK-DAG: DW_TAG_subprogram
; CHECK-NEXT: DW_AT_low_pc ([[ONE_PAST_BAR]])
; CHECK-NEXT: DW_AT_high_pc (0x{{[0-9a-f]+}})
; CHECK-NEXT: DW_AT_frame_base (DW_OP_reg31 WSP)
; CHECK-NEXT: DW_AT_linkage_name ("[[NAME:outlined_ir_func_[0-9]+]]")
; CHECK-NEXT: DW_AT_name ("[[NAME]]")
; CHECK-NEXT: DW_AT_artificial (true)
; CHECK-NEXT: DW_AT_external (true)
define void @outline_debug1() !dbg !6 {
entry:
%a = alloca i32, align 4, !dbg !17
call void @llvm.dbg.value(metadata i32* %a, metadata !9, metadata !DIExpression()), !dbg !17
%b = alloca i32, align 4, !dbg !18
call void @llvm.dbg.value(metadata i32* %b, metadata !11, metadata !DIExpression()), !dbg !18
%c = alloca i32, align 4, !dbg !19
call void @llvm.dbg.value(metadata i32* %c, metadata !12, metadata !DIExpression()), !dbg !19
store i32 2, i32* %a, align 4, !dbg !20
store i32 3, i32* %b, align 4, !dbg !21
store i32 4, i32* %c, align 4, !dbg !22
%al = load i32, i32* %a, align 4, !dbg !23
call void @llvm.dbg.value(metadata i32 %al, metadata !13, metadata !DIExpression()), !dbg !23
%bl = load i32, i32* %b, align 4, !dbg !24
call void @llvm.dbg.value(metadata i32 %bl, metadata !15, metadata !DIExpression()), !dbg !24
%cl = load i32, i32* %c, align 4, !dbg !25
call void @llvm.dbg.value(metadata i32 %cl, metadata !16, metadata !DIExpression()), !dbg !25
ret void, !dbg !26
}
define void @outline_debug2() !dbg !27 {
entry:
%a = alloca i32, align 4, !dbg !35
call void @llvm.dbg.value(metadata i32* %a, metadata !29, metadata !DIExpression()), !dbg !35
%b = alloca i32, align 4, !dbg !36
call void @llvm.dbg.value(metadata i32* %b, metadata !30, metadata !DIExpression()), !dbg !36
%c = alloca i32, align 4, !dbg !37
call void @llvm.dbg.value(metadata i32* %c, metadata !31, metadata !DIExpression()), !dbg !37
store i32 2, i32* %a, align 4, !dbg !38
store i32 3, i32* %b, align 4, !dbg !39
store i32 4, i32* %c, align 4, !dbg !40
%al = load i32, i32* %a, align 4, !dbg !41
call void @llvm.dbg.value(metadata i32 %al, metadata !32, metadata !DIExpression()), !dbg !41
%bl = load i32, i32* %b, align 4, !dbg !42
call void @llvm.dbg.value(metadata i32 %bl, metadata !33, metadata !DIExpression()), !dbg !42
%cl = load i32, i32* %c, align 4, !dbg !43
call void @llvm.dbg.value(metadata i32 %cl, metadata !34, metadata !DIExpression()), !dbg !43
ret void, !dbg !44
}
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
attributes #0 = { nounwind readnone speculatable willreturn }
!llvm.dbg.cu = !{!0}
!llvm.debugify = !{!3, !4}
!llvm.module.flags = !{!5}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "llvm/test/DebugInfo/ir-outliner.ll", directory: "/")
!2 = !{}
!3 = !{i32 20}
!4 = !{i32 12}
!5 = !{i32 2, !"Debug Info Version", i32 3}
!6 = distinct !DISubprogram(name: "outline_debug1", linkageName: "outline_debug1", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!7 = !DISubroutineType(types: !2)
!8 = !{!9, !11, !12, !13, !15, !16}
!9 = !DILocalVariable(name: "1", scope: !6, file: !1, line: 1, type: !10)
!10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned)
!11 = !DILocalVariable(name: "2", scope: !6, file: !1, line: 2, type: !10)
!12 = !DILocalVariable(name: "3", scope: !6, file: !1, line: 3, type: !10)
!13 = !DILocalVariable(name: "4", scope: !6, file: !1, line: 7, type: !14)
!14 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
!15 = !DILocalVariable(name: "5", scope: !6, file: !1, line: 8, type: !14)
!16 = !DILocalVariable(name: "6", scope: !6, file: !1, line: 9, type: !14)
!17 = !DILocation(line: 1, column: 1, scope: !6)
!18 = !DILocation(line: 2, column: 1, scope: !6)
!19 = !DILocation(line: 3, column: 1, scope: !6)
!20 = !DILocation(line: 4, column: 1, scope: !6)
!21 = !DILocation(line: 5, column: 1, scope: !6)
!22 = !DILocation(line: 6, column: 1, scope: !6)
!23 = !DILocation(line: 7, column: 1, scope: !6)
!24 = !DILocation(line: 8, column: 1, scope: !6)
!25 = !DILocation(line: 9, column: 1, scope: !6)
!26 = !DILocation(line: 10, column: 1, scope: !6)
!27 = distinct !DISubprogram(name: "outline_debug2", linkageName: "outline_debug2", scope: null, file: !1, line: 11, type: !7, scopeLine: 11, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !28)
!28 = !{!29, !30, !31, !32, !33, !34}
!29 = !DILocalVariable(name: "7", scope: !27, file: !1, line: 11, type: !10)
!30 = !DILocalVariable(name: "8", scope: !27, file: !1, line: 12, type: !10)
!31 = !DILocalVariable(name: "9", scope: !27, file: !1, line: 13, type: !10)
!32 = !DILocalVariable(name: "10", scope: !27, file: !1, line: 17, type: !14)
!33 = !DILocalVariable(name: "11", scope: !27, file: !1, line: 18, type: !14)
!34 = !DILocalVariable(name: "12", scope: !27, file: !1, line: 19, type: !14)
!35 = !DILocation(line: 11, column: 1, scope: !27)
!36 = !DILocation(line: 12, column: 1, scope: !27)
!37 = !DILocation(line: 13, column: 1, scope: !27)
!38 = !DILocation(line: 14, column: 1, scope: !27)
!39 = !DILocation(line: 15, column: 1, scope: !27)
!40 = !DILocation(line: 16, column: 1, scope: !27)
!41 = !DILocation(line: 17, column: 1, scope: !27)
!42 = !DILocation(line: 18, column: 1, scope: !27)
!43 = !DILocation(line: 19, column: 1, scope: !27)
!44 = !DILocation(line: 20, column: 1, scope: !27)
; IRDEBUG-LABEL: @outline_debug1(
; IRDEBUG-NEXT: entry:
; IRDEBUG-NEXT: [[A:%.*]] = alloca i32, align 4, !dbg [[DBG17:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[A]], metadata [[META9:![0-9]+]], metadata !DIExpression()), !dbg [[DBG17]]
; IRDEBUG-NEXT: [[B:%.*]] = alloca i32, align 4, !dbg [[DBG18:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[B]], metadata [[META11:![0-9]+]], metadata !DIExpression()), !dbg [[DBG18]]
; IRDEBUG-NEXT: [[C:%.*]] = alloca i32, align 4, !dbg [[DBG19:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[C]], metadata [[META12:![0-9]+]], metadata !DIExpression()), !dbg [[DBG19]]
; IRDEBUG-NEXT: call void @outlined_ir_func_0(i32* [[A]], i32* [[B]], i32* [[C]]), !dbg [[DBG20:![0-9]+]]
; IRDEBUG-NEXT: ret void, !dbg [[DBG21:![0-9]+]]
;
;
; IRDEBUG-LABEL: @outline_debug2(
; IRDEBUG-NEXT: entry:
; IRDEBUG-NEXT: [[A:%.*]] = alloca i32, align 4, !dbg [[DBG30:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[A]], metadata [[META24:![0-9]+]], metadata !DIExpression()), !dbg [[DBG30]]
; IRDEBUG-NEXT: [[B:%.*]] = alloca i32, align 4, !dbg [[DBG31:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[B]], metadata [[META25:![0-9]+]], metadata !DIExpression()), !dbg [[DBG31]]
; IRDEBUG-NEXT: [[C:%.*]] = alloca i32, align 4, !dbg [[DBG32:![0-9]+]]
; IRDEBUG-NEXT: call void @llvm.dbg.value(metadata i32* [[C]], metadata [[META26:![0-9]+]], metadata !DIExpression()), !dbg [[DBG32]]
; IRDEBUG-NEXT: call void @outlined_ir_func_0(i32* [[A]], i32* [[B]], i32* [[C]]), !dbg [[DBG33:![0-9]+]]
; IRDEBUG-NEXT: ret void, !dbg [[DBG34:![0-9]+]]
;
;
; IRDEBUG: @outlined_ir_func_0(i32* [[TMP0:%.*]], i32* [[TMP1:%.*]], i32* [[TMP2:%.*]])
; IRDEBUG: entry_to_outline:
; IRDEBUG-NEXT: store i32 2, i32* [[TMP0]], align 4
; IRDEBUG-NEXT: store i32 3, i32* [[TMP1]], align 4
; IRDEBUG-NEXT: store i32 4, i32* [[TMP2]], align 4
; IRDEBUG-NEXT: [[AL:%.*]] = load i32, i32* [[TMP0]], align 4
; IRDEBUG-NEXT: [[BL:%.*]] = load i32, i32* [[TMP1]], align 4
; IRDEBUG-NEXT: [[CL:%.*]] = load i32, i32* [[TMP2]], align 4
; IRDEBUG-NEXT: br label [[ENTRY_AFTER_OUTLINE_EXITSTUB:%.*]]
;
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