; LLVM IR from google/or-tools :: ortools/base/sysinfo.ll (ZN19operations_research21GetProcessMemoryUsageEv)

; 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"

@.str = external hidden unnamed_addr constant [15 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN19operations_research21GetProcessMemoryUsageEv() #0 {
  %1 = alloca i64, align 8
  %2 = alloca i32, align 4
  %3 = alloca [30 x i8], align 16
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 30, ptr %3) #4
  %6 = getelementptr inbounds [30 x i8], ptr %3, i64 0, i64 0
  %7 = call i32 @getpid() #4
  %8 = call i32 (ptr, i64, ptr, ...) @snprintf(ptr noundef %6, i64 noundef 30, ptr noundef @.str, i32 noundef %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %9 = getelementptr inbounds [30 x i8], ptr %3, i64 0, i64 0
  %10 = call noalias ptr @fopen(ptr noundef %9, ptr noundef @.str.1)
  store ptr %10, ptr %4, align 8, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !9
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %19

13:                                               ; preds = %0
  %14 = load ptr, ptr %4, align 8, !tbaa !9
  %15 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef %14, ptr noundef @.str.2, ptr noundef %2)
  %16 = icmp ne i32 %15, 1
  br i1 %16, label %17, label %18

17:                                               ; preds = %13
  store i64 0, ptr %1, align 8
  store i32 1, ptr %5, align 4
  br label %25

18:                                               ; preds = %13
  br label %19

19:                                               ; preds = %18, %0
  %20 = load ptr, ptr %4, align 8, !tbaa !9
  %21 = call i32 @fclose(ptr noundef %20)
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = zext i32 %22 to i64
  %24 = mul nsw i64 1024, %23
  store i64 %24, ptr %1, align 8
  store i32 1, ptr %5, align 4
  br label %25

25:                                               ; preds = %19, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 30, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %26 = load i64, ptr %1, align 8
  ret i64 %26
}

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

; Function Attrs: nounwind
declare i32 @snprintf(ptr noundef, i64 noundef, ptr noundef, ...) #2

; Function Attrs: nounwind
declare i32 @getpid() #2

declare noalias ptr @fopen(ptr noundef, ptr noundef) #3

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) #3

declare i32 @fclose(ptr noundef) #3

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

attributes #0 = { mustprogress 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 "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 #3 = { "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 #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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"

@.str = external hidden unnamed_addr constant [15 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i64 0, 4398046510081) i64 @_ZN19operations_research21GetProcessMemoryUsageEv() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca [30 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 30, ptr nonnull %2) #5
  %3 = tail call i32 @getpid() #5
  %4 = call i32 (ptr, i64, ptr, ...) @snprintf(ptr noundef nonnull dereferenceable(1) %2, i64 noundef 30, ptr noundef nonnull @.str, i32 noundef %3) #5
  %5 = call noalias ptr @fopen(ptr noundef nonnull %2, ptr noundef nonnull @.str.1)
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %8, label %6

6:                                                ; preds = %0
  %7 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef nonnull %5, ptr noundef nonnull @.str.2, ptr noundef nonnull %1)
  %.not4 = icmp eq i32 %7, 1
  br i1 %.not4, label %8, label %13

8:                                                ; preds = %6, %0
  %9 = call i32 @fclose(ptr noundef %5)
  %10 = load i32, ptr %1, align 4, !tbaa !5
  %11 = zext i32 %10 to i64
  %12 = shl nuw nsw i64 %11, 10
  br label %13

13:                                               ; preds = %6, %8
  %.0 = phi i64 [ %12, %8 ], [ 0, %6 ]
  call void @llvm.lifetime.end.p0(i64 30, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i64 %.0
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @snprintf(ptr noalias nocapture noundef writeonly, i64 noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nounwind
declare i32 @getpid() local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #2

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #2

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

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 #3 = { nounwind "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 #4 = { "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 #5 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass