; LLVM IR from ANL-CESAR/XSBench :: openmp-threading (Simulation)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i64 @grid_search(i64 noundef %0, double noundef %1, ptr noalias noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca double, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store double %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = sub nsw i64 %11, 1
  store i64 %12, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %13 = load i64, ptr %8, align 8, !tbaa !5
  %14 = load i64, ptr %7, align 8, !tbaa !5
  %15 = sub nsw i64 %13, %14
  store i64 %15, ptr %10, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %34, %3
  %17 = load i64, ptr %10, align 8, !tbaa !5
  %18 = icmp sgt i64 %17, 1
  br i1 %18, label %19, label %38

19:                                               ; preds = %16
  %20 = load i64, ptr %7, align 8, !tbaa !5
  %21 = load i64, ptr %10, align 8, !tbaa !5
  %22 = sdiv i64 %21, 2
  %23 = add nsw i64 %20, %22
  store i64 %23, ptr %9, align 8, !tbaa !5
  %24 = load ptr, ptr %6, align 8, !tbaa !11
  %25 = load i64, ptr %9, align 8, !tbaa !5
  %26 = getelementptr inbounds double, ptr %24, i64 %25
  %27 = load double, ptr %26, align 8, !tbaa !9
  %28 = load double, ptr %5, align 8, !tbaa !9
  %29 = fcmp ogt double %27, %28
  br i1 %29, label %30, label %32

30:                                               ; preds = %19
  %31 = load i64, ptr %9, align 8, !tbaa !5
  store i64 %31, ptr %8, align 8, !tbaa !5
  br label %34

32:                                               ; preds = %19
  %33 = load i64, ptr %9, align 8, !tbaa !5
  store i64 %33, ptr %7, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %32, %30
  %35 = load i64, ptr %8, align 8, !tbaa !5
  %36 = load i64, ptr %7, align 8, !tbaa !5
  %37 = sub nsw i64 %35, %36
  store i64 %37, ptr %10, align 8, !tbaa !5
  br label %16, !llvm.loop !13

38:                                               ; preds = %16
  %39 = load i64, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i64 %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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(argmem: read) uwtable
define dso_local i64 @grid_search(i64 noundef %0, double noundef %1, ptr noalias nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp sgt i64 %0, 2
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %5 = add nsw i64 %0, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.018 = phi i64 [ %11, %.lr.ph ], [ %5, %.lr.ph.preheader ]
  %.01317 = phi i64 [ %.013., %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.01416 = phi i64 [ %..014, %.lr.ph ], [ %5, %.lr.ph.preheader ]
  %6 = lshr i64 %.018, 1
  %7 = add nuw nsw i64 %6, %.01317
  %8 = getelementptr inbounds double, ptr %2, i64 %7
  %9 = load double, ptr %8, align 8, !tbaa !5
  %10 = fcmp ogt double %9, %1
  %..014 = select i1 %10, i64 %7, i64 %.01416
  %.013. = select i1 %10, i64 %.01317, i64 %7
  %11 = sub nsw i64 %..014, %.013.
  %12 = icmp sgt i64 %11, 1
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.013.lcssa = phi i64 [ 0, %3 ], [ %.013., %.lr.ph ]
  ret i64 %.013.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass