llvm/test/Transforms/SimplifyCFG/speculate-dbgvalue.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -S -simplifycfg | FileCheck %s

; This test case was generated from speculate-dbgvalue.c:
;
;   int test1(int getdirt, int dirt) {
;     int result = 100;
;     if (getdirt != 0)
;       result = dirt;
;     return result;
;   }
;
; using
;   clang speculate-dbgvalue.c -S -emit-llvm -g -O3 -mllvm -disable-llvm-optzns -o - | opt -mem2reg -S


; Function Attrs: nounwind uwtable
define i32 @test1(i32 %getdirt, i32 %dirt) #0 !dbg !7 {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @llvm.dbg.value(metadata i32 [[GETDIRT:%.*]], metadata !12, metadata !DIExpression()), !dbg !15
; CHECK-NEXT:    call void @llvm.dbg.value(metadata i32 [[DIRT:%.*]], metadata !13, metadata !DIExpression()), !dbg !16
; CHECK-NEXT:    call void @llvm.dbg.value(metadata i32 100, metadata !14, metadata !DIExpression()), !dbg !17
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne i32 [[GETDIRT]], 0, !dbg !18
; *** We used to get an incorrect "call void @llvm.dbg.value(metadata i32 [[DIRT]], metadata !14, metadata !DIExpression()), !dbg !17" here, before the select. ***
; CHECK-NOT:     call void @llvm.dbg.value(metadata i32 [[DIRT]], metadata !14
; CHECK-NEXT:    [[RESULT:%.*]] = select i1 [[CMP]], i32 [[DIRT]], i32 100, !dbg !20
; CHECK-NEXT:    call void @llvm.dbg.value(metadata i32 [[RESULT]], metadata !14, metadata !DIExpression()), !dbg !17
; CHECK-NEXT:    ret i32 [[RESULT]], !dbg !21
; CHECK: !12 = !DILocalVariable(name: "getdirt"
; CHECK: !13 = !DILocalVariable(name: "dirt"
; CHECK: !14 = !DILocalVariable(name: "result"
;
entry:
  call void @llvm.dbg.value(metadata i32 %getdirt, metadata !12, metadata !DIExpression()), !dbg !15
  call void @llvm.dbg.value(metadata i32 %dirt, metadata !13, metadata !DIExpression()), !dbg !16
  call void @llvm.dbg.value(metadata i32 100, metadata !14, metadata !DIExpression()), !dbg !17
  %cmp = icmp ne i32 %getdirt, 0, !dbg !18
  br i1 %cmp, label %if.then, label %if.end, !dbg !20

if.then:                                          ; preds = %entry
  call void @llvm.dbg.value(metadata i32 %dirt, metadata !14, metadata !DIExpression()), !dbg !17
  br label %if.end, !dbg !21

if.end:                                           ; preds = %if.then, %entry
  %result.0 = phi i32 [ %dirt, %if.then ], [ 100, %entry ]
  call void @llvm.dbg.value(metadata i32 %result.0, metadata !14, metadata !DIExpression()), !dbg !17
  ret i32 %result.0, !dbg !22
}

; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1

attributes #0 = { nounwind uwtable }
attributes #1 = { nounwind readnone speculatable }

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}

!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "speculate-dbgvalue.c", directory: "/foo")
!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"}
!7 = distinct !DISubprogram(name: "test1", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !10, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{!12, !13, !14}
!12 = !DILocalVariable(name: "getdirt", arg: 1, scope: !7, file: !1, line: 1, type: !10)
!13 = !DILocalVariable(name: "dirt", arg: 2, scope: !7, file: !1, line: 1, type: !10)
!14 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 2, type: !10)
!15 = !DILocation(line: 1, column: 15, scope: !7)
!16 = !DILocation(line: 1, column: 28, scope: !7)
!17 = !DILocation(line: 2, column: 7, scope: !7)
!18 = !DILocation(line: 3, column: 15, scope: !19)
!19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 7)
!20 = !DILocation(line: 3, column: 7, scope: !7)
!21 = !DILocation(line: 4, column: 5, scope: !19)
!22 = !DILocation(line: 5, column: 3, scope: !7)