test/Transforms/JumpThreading/guard-split-debuginfo.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
; RUN: opt -S -passes=jump-threading %s -o - -S | FileCheck %s
; RUN: opt -S -passes=jump-threading %s -o - -S --try-experimental-debuginfo-iterators | FileCheck %s

; Test that debug-info records in the Merge block, to be copied by
; DuplicateInstructionsInSplitBetween, get duplicated into the relevant
; parent blocks. And that ino jump-threading, the old dbg.value gets
; deleted.

; Test that JumpThreading's threadGuard() propagates the debug location
; to the `phi` from the instruction it replaces (`%retval`)

declare void @llvm.experimental.guard(i1, ...)

declare i32 @f1()
declare i32 @f2()

declare void @llvm.dbg.value(metadata, metadata, metadata)

define i32 @branch_implies_guard(i32 %a) !dbg !7 {
; CHECK-LABEL: @branch_implies_guard(
; CHECK-NEXT:    [[COND:%.*]] = icmp slt i32 [[A:%.*]], 10
; CHECK-NEXT:    br i1 [[COND]], label [[T1_SPLIT:%.*]], label [[F1_SPLIT:%.*]], !dbg [[DBG12:![0-9]+]]
; CHECK:       T1.split:
; CHECK-NEXT:    [[V1:%.*]] = call i32 @f1(), !dbg [[DBG12]]
; CHECK-NEXT:      #dbg_value(i32 0, [[META13:![0-9]+]], !DIExpression(), [[META14:![0-9]+]])
; CHECK-NEXT:    [[RETVAL3:%.*]] = add i32 [[V1]], 10, !dbg [[DBG12]]
; CHECK-NEXT:    [[CONDGUARD4:%.*]] = icmp slt i32 [[A]], 20, !dbg [[DBG12]]
; CHECK-NEXT:    br label [[MERGE:%.*]]
; CHECK:       F1.split:
; CHECK-NEXT:    [[V2:%.*]] = call i32 @f2(), !dbg [[DBG12]]
; CHECK-NEXT:      #dbg_value(i32 0, [[META13]], !DIExpression(), [[META14]])
; CHECK-NEXT:    [[RETVAL1:%.*]] = add i32 [[V2]], 10, !dbg [[DBG12]]
; CHECK-NEXT:    [[CONDGUARD2:%.*]] = icmp slt i32 [[A]], 20, !dbg [[DBG12]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[CONDGUARD2]]) [ "deopt"() ]
; CHECK-NEXT:    br label [[MERGE]]
; CHECK:       Merge:
; CHECK-NEXT:    [[RETPHI:%.*]] = phi i32 [ [[V1]], [[T1_SPLIT]] ], [ [[V2]], [[F1_SPLIT]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = phi i32 [ [[RETVAL3]], [[T1_SPLIT]] ], [ [[RETVAL1]], [[F1_SPLIT]] ], !dbg [[DBG12]]
; CHECK-NEXT:    ret i32 [[TMP1]], !dbg [[DBG12]]
;
  %cond = icmp slt i32 %a, 10
  br i1 %cond, label %T1, label %F1, !dbg !26

T1:
  %v1 = call i32 @f1(), !dbg !26
  br label %Merge

F1:
  %v2 = call i32 @f2(), !dbg !26
  br label %Merge

Merge:
  %retPhi = phi i32 [ %v1, %T1 ], [ %v2, %F1 ]
  call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
  %retVal = add i32 %retPhi, 10, !dbg !26
  %condGuard = icmp slt i32 %a, 20, !dbg !26
  call void(i1, ...) @llvm.experimental.guard(i1 %condGuard) [ "deopt"() ]
  ret i32 %retVal, !dbg !26
}

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

!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!""}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !11, !11}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
!13 = !DILocation(line: 0, scope: !7)
!14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11)
!19 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 7)
!26 = !DILocation(line: 13, column: 3, scope: !7)

;.
; CHECK: [[META0:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C99, file: [[META1:![0-9]+]], isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: [[META2:![0-9]+]], splitDebugInlining: false, nameTableKind: None)
; CHECK: [[META1]] = !DIFile(filename: "test.c", directory: {{.*}})
; CHECK: [[META2]] = !{}
; CHECK: [[META3:![0-9]+]] = !{i32 7, !"Dwarf Version", i32 4}
; CHECK: [[META4:![0-9]+]] = !{i32 2, !"Debug Info Version", i32 3}
; CHECK: [[META5:![0-9]+]] = !{i32 1, !"wchar_size", i32 4}
; CHECK: [[META6:![0-9]+]] = !{!""}
; CHECK: [[META7:![0-9]+]] = distinct !DISubprogram(name: "foo", scope: [[META1]], file: [[META1]], line: 3, type: [[META8:![0-9]+]], scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: [[META0]], retainedNodes: [[META2]])
; CHECK: [[META8]] = !DISubroutineType(types: [[META9:![0-9]+]])
; CHECK: [[META9]] = !{[[META10:![0-9]+]], [[META11:![0-9]+]], [[META11]]}
; CHECK: [[META10]] = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
; CHECK: [[META11]] = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
; CHECK: [[DBG12]] = !DILocation(line: 13, column: 3, scope: [[META7]])
; CHECK: [[META13]] = !DILocalVariable(name: "bar", arg: 1, scope: [[META7]], file: [[META1]], line: 3, type: [[META11]])
; CHECK: [[META14]] = !DILocation(line: 0, scope: [[META7]])
;.