llvm/test/Transforms/SimplifyCFG/merge-cond-stores-debuginfo.ll

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

; Test that SimplifyCFG properly preserves debug info when merging conditional stores.
; This test verifies that:
; 1. DIAssignID metadata is properly merged.
; 2. The hoisted dbg_assign value correctly represents the merged store value.

define void @merge_stores_different_values(ptr %p, i32 %a, i32 %b) !dbg !10 {
; CHECK-LABEL: @merge_stores_different_values(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[X1:%.*]] = icmp eq i32 [[A:%.*]], 0, !dbg [[DBG15:![0-9]+]]
; CHECK-NEXT:    [[X2:%.*]] = icmp eq i32 [[B:%.*]], 0, !dbg [[DBG16:![0-9]+]]
; CHECK-NEXT:      #dbg_assign(i32 [[SPEC_SELECT:%.*]], [[META17:![0-9]+]], !DIExpression(), [[META18:![0-9]+]], ptr [[P:%.*]], !DIExpression(), [[META19:![0-9]+]])
; CHECK-NEXT:    [[SPEC_SELECT]] = select i1 [[X2]], i32 200, i32 100, !dbg [[DBG20:![0-9]+]]
; CHECK-NEXT:    [[TMP0:%.*]] = xor i1 [[X1]], true, !dbg [[DBG21:![0-9]+]]
; CHECK-NEXT:    [[TMP1:%.*]] = xor i1 [[X2]], true, !dbg [[DBG21]]
; CHECK-NEXT:    [[TMP2:%.*]] = or i1 [[TMP0]], [[TMP1]], !dbg [[DBG21]]
; CHECK-NEXT:    br i1 [[TMP2]], label [[TMP3:%.*]], label [[TMP4:%.*]], !dbg [[DBG21]]
; CHECK:       3:
; CHECK-NEXT:    store i32 [[SPEC_SELECT]], ptr [[P]], align 4, !dbg [[META19]], !DIAssignID [[META18]]
; CHECK-NEXT:    br label [[TMP4]], !dbg [[DBG21]]
; CHECK:       4:
; CHECK-NEXT:    ret void, !dbg [[DBG21]]
;
entry:
  %x1 = icmp eq i32 %a, 0, !dbg !15
  br i1 %x1, label %fallthrough, label %yes1, !dbg !16

yes1:                                             ; preds = %entry
  store i32 200, ptr %p, align 4, !dbg !17, !DIAssignID !18
    #dbg_assign(i32 200, !19, !DIExpression(), !18, ptr %p, !DIExpression(), !17)
  br label %fallthrough, !dbg !20

fallthrough:                                      ; preds = %yes1, %entry
  %x2 = icmp eq i32 %b, 0, !dbg !21
  br i1 %x2, label %end, label %yes2, !dbg !22

yes2:                                             ; preds = %fallthrough
  store i32 100, ptr %p, align 4, !dbg !23, !DIAssignID !24
    #dbg_assign(i32 100, !19, !DIExpression(), !24, ptr %p, !DIExpression(), !23)
  br label %end, !dbg !25

end:                                              ; preds = %yes2, %fallthrough
  ret void, !dbg !26
}

!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}
!llvm.ident = !{!9}

!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 19.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp")
!2 = !{i32 7, !"Dwarf Version", i32 5}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{i32 8, !"PIC Level", i32 2}
!6 = !{i32 7, !"PIE Level", i32 2}
!7 = !{i32 7, !"uwtable", i32 2}
!8 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
!9 = !{!"clang version 19.0.0"}
!10 = distinct !DISubprogram(name: "merge_stores_different_values", scope: !1, file: !1, line: 10, type: !11, scopeLine: 10, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !14)
!11 = !DISubroutineType(types: !12)
!12 = !{null, !13, !13, !13}
!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!14 = !{}
!15 = !DILocation(line: 12, column: 7, scope: !10)
!16 = !DILocation(line: 12, column: 5, scope: !10)
!17 = !DILocation(line: 13, column: 12, scope: !10)
!18 = distinct !DIAssignID()
!19 = !DILocalVariable(name: "val", scope: !10, file: !1, line: 11, type: !13)
!20 = !DILocation(line: 13, column: 5, scope: !10)
!21 = !DILocation(line: 14, column: 7, scope: !10)
!22 = !DILocation(line: 14, column: 5, scope: !10)
!23 = !DILocation(line: 15, column: 12, scope: !10)
!24 = distinct !DIAssignID()
!25 = !DILocation(line: 15, column: 5, scope: !10)
!26 = !DILocation(line: 16, column: 1, scope: !10)