; LLVM IR from wuzhouhui/leetcode :: 74_search_matrix (searchMatrix)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nounwind uwtable
define dso_local i32 @searchMatrix(ptr noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i32 %3, ptr %9, align 4, !tbaa !9
  %15 = load i32, ptr %7, align 4, !tbaa !9
  %16 = icmp ne i32 %15, 0
  br i1 %16, label %17, label %20

17:                                               ; preds = %4
  %18 = load i32, ptr %8, align 4, !tbaa !9
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %21, label %20

20:                                               ; preds = %17, %4
  store i32 0, ptr %5, align 4
  br label %65

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = mul nsw i32 %22, %23
  %25 = sub nsw i32 %24, 1
  store i32 %25, ptr %11, align 4, !tbaa !9
  br label %26

26:                                               ; preds = %62, %21
  %27 = load i32, ptr %10, align 4, !tbaa !9
  %28 = load i32, ptr %11, align 4, !tbaa !9
  %29 = icmp sle i32 %27, %28
  br i1 %29, label %30, label %63

30:                                               ; preds = %26
  %31 = load i32, ptr %10, align 4, !tbaa !9
  %32 = load i32, ptr %11, align 4, !tbaa !9
  %33 = add nsw i32 %31, %32
  %34 = sdiv i32 %33, 2
  store i32 %34, ptr %12, align 4, !tbaa !9
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = load i32, ptr %12, align 4, !tbaa !9
  %37 = load i32, ptr %8, align 4, !tbaa !9
  %38 = sdiv i32 %36, %37
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds ptr, ptr %35, i64 %39
  %41 = load ptr, ptr %40, align 8, !tbaa !5
  %42 = load i32, ptr %12, align 4, !tbaa !9
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = srem i32 %42, %43
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %41, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !9
  store i32 %47, ptr %13, align 4, !tbaa !9
  %48 = load i32, ptr %13, align 4, !tbaa !9
  %49 = load i32, ptr %9, align 4, !tbaa !9
  %50 = icmp eq i32 %48, %49
  br i1 %50, label %51, label %52

51:                                               ; preds = %30
  store i32 1, ptr %5, align 4
  store i32 1, ptr %14, align 4
  br label %64

52:                                               ; preds = %30
  %53 = load i32, ptr %9, align 4, !tbaa !9
  %54 = load i32, ptr %13, align 4, !tbaa !9
  %55 = icmp slt i32 %53, %54
  br i1 %55, label %56, label %59

56:                                               ; preds = %52
  %57 = load i32, ptr %12, align 4, !tbaa !9
  %58 = sub nsw i32 %57, 1
  store i32 %58, ptr %11, align 4, !tbaa !9
  br label %62

59:                                               ; preds = %52
  %60 = load i32, ptr %12, align 4, !tbaa !9
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %10, align 4, !tbaa !9
  br label %62

62:                                               ; preds = %59, %56
  br label %26, !llvm.loop !11

63:                                               ; preds = %26
  store i32 0, ptr %5, align 4
  store i32 1, ptr %14, align 4
  br label %64

64:                                               ; preds = %63, %51
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %65

65:                                               ; preds = %64, %20
  %66 = load i32, ptr %5, align 4
  ret i32 %66
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 2) i32 @searchMatrix(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp ne i32 %1, 0
  %6 = icmp ne i32 %2, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %7, label %.loopexit

7:                                                ; preds = %4
  %8 = mul nsw i32 %2, %1
  %.not28 = icmp slt i32 %8, 1
  br i1 %.not28, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %7
  %9 = add nsw i32 %8, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %21
  %.02030 = phi i32 [ %.121, %21 ], [ 0, %.lr.ph.preheader ]
  %.02229 = phi i32 [ %.123, %21 ], [ %9, %.lr.ph.preheader ]
  %10 = add nuw nsw i32 %.02030, %.02229
  %11 = lshr i32 %10, 1
  %12 = sdiv i32 %11, %2
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds ptr, ptr %0, i64 %13
  %15 = load ptr, ptr %14, align 8, !tbaa !5
  %16 = srem i32 %11, %2
  %17 = zext nneg i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %15, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = icmp eq i32 %19, %3
  br i1 %20, label %.loopexit, label %21

21:                                               ; preds = %.lr.ph
  %22 = icmp sgt i32 %19, %3
  %23 = add nsw i32 %11, -1
  %24 = add nuw nsw i32 %11, 1
  %.123 = select i1 %22, i32 %23, i32 %.02229
  %.121 = select i1 %22, i32 %.02030, i32 %24
  %.not = icmp sgt i32 %.121, %.123
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !11

.loopexit:                                        ; preds = %21, %.lr.ph, %7, %4
  %.1 = phi i32 [ 0, %4 ], [ 0, %7 ], [ 0, %21 ], [ 1, %.lr.ph ]
  ret i32 %.1
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass