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llvm-project/llvm/test/CodeGen/X86/machinesink-null-debuginfo.ll

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Fix out-of-order stepping behavior in programs with sunk instructions. MachineSink attempts to place instructions near the basic blocks where they are needed. Once an instruction has been sunk, its location relative to other instructions no longer is consistent with the original source code. In order to ensure correct stepping in the debugger, the debug location for sunk instructions is either merged with the insertion point or erased if the target successor block is empty. Originally submitted as r318679, revised to fix sanitizer failure and improve testing. Patch by Matthew Voss! Differential Revision: https://reviews.llvm.org/D39933 llvm-svn: 320216
2017-12-09 08:17:01 +08:00
; RUN: llc -simplify-mir -stop-after=machine-sink < %s -o - | FileCheck %s
; ModuleID = 'test-sink-debug.cpp'
source_filename = "test-sink-debug.cpp"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: nounwind readnone uwtable
define double @_Z3fooddb(double %x, double %y, i1 zeroext %c) local_unnamed_addr !dbg !7 {
tail call void @llvm.dbg.value(metadata double %x, metadata !13, metadata !DIExpression()), !dbg !16
tail call void @llvm.dbg.value(metadata double %y, metadata !14, metadata !DIExpression()), !dbg !17
tail call void @llvm.dbg.value(metadata i1 %c, metadata !15, metadata !DIExpression()), !dbg !18
%a = fdiv double %x, 3.000000e+00
Improve the test for r320216. NFC. Patch by Matthew Voss! llvm-svn: 321207
2017-12-21 03:11:31 +08:00
%b = fdiv double %y, 5.000000e+00, !dbg !19
Fix out-of-order stepping behavior in programs with sunk instructions. MachineSink attempts to place instructions near the basic blocks where they are needed. Once an instruction has been sunk, its location relative to other instructions no longer is consistent with the original source code. In order to ensure correct stepping in the debugger, the debug location for sunk instructions is either merged with the insertion point or erased if the target successor block is empty. Originally submitted as r318679, revised to fix sanitizer failure and improve testing. Patch by Matthew Voss! Differential Revision: https://reviews.llvm.org/D39933 llvm-svn: 320216
2017-12-09 08:17:01 +08:00
%cond = select i1 %c, double %a, double %b
Improve the test for r320216. NFC. Patch by Matthew Voss! llvm-svn: 321207
2017-12-21 03:11:31 +08:00
; CHECK-NOT: debug-location !19
ret double %cond, !dbg !20
Fix out-of-order stepping behavior in programs with sunk instructions. MachineSink attempts to place instructions near the basic blocks where they are needed. Once an instruction has been sunk, its location relative to other instructions no longer is consistent with the original source code. In order to ensure correct stepping in the debugger, the debug location for sunk instructions is either merged with the insertion point or erased if the target successor block is empty. Originally submitted as r318679, revised to fix sanitizer failure and improve testing. Patch by Matthew Voss! Differential Revision: https://reviews.llvm.org/D39933 llvm-svn: 320216
2017-12-09 08:17:01 +08:00
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #1 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 (trunk 313291)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "test-sink-debug.cpp", directory: "/tmp")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"clang version 6.0.0 (trunk 313291)"}
!7 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooddb", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !12)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !10, !10, !11}
!10 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
!11 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
!12 = !{!13, !14, !15}
!13 = !DILocalVariable(name: "x", arg: 1, scope: !7, file: !1, line: 1, type: !10)
!14 = !DILocalVariable(name: "y", arg: 2, scope: !7, file: !1, line: 1, type: !10)
!15 = !DILocalVariable(name: "c", arg: 3, scope: !7, file: !1, line: 1, type: !11)
!16 = !DILocation(line: 1, column: 19, scope: !7)
!17 = !DILocation(line: 1, column: 29, scope: !7)
!18 = !DILocation(line: 1, column: 37, scope: !7)
Improve the test for r320216. NFC. Patch by Matthew Voss! llvm-svn: 321207
2017-12-21 03:11:31 +08:00
!19 = !DILocation(line: 2, column: 26, scope: !7)
!20 = !DILocation(line: 2, column: 3, scope: !7)