; LLVM IR from cvra/robot-software :: lib/parameter_flash_storage (parameter_flash_storage)

; 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: nounwind uwtable
define dso_local ptr @parameter_flash_storage_block_find_last_used(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %5, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store ptr null, ptr %4, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %9, %1
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call zeroext i1 @parameter_flash_storage_block_is_valid(ptr noundef %7)
  br i1 %8, label %9, label %18

9:                                                ; preds = %6
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %10, ptr %4, align 8, !tbaa !5
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = call i32 @parameter_flash_storage_block_get_length(ptr noundef %11)
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = zext i32 %12 to i64
  %15 = getelementptr inbounds i8, ptr %13, i64 %14
  store ptr %15, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i64 12
  store ptr %17, ptr %3, align 8, !tbaa !5
  br label %6, !llvm.loop !9

18:                                               ; preds = %6
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret ptr %19
}

; 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
declare dso_local i32 @parameter_flash_storage_block_get_length(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @parameter_flash_storage_block_is_valid(ptr noundef) #1

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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: nounwind uwtable
define dso_local noundef ptr @parameter_flash_storage_block_find_last_used(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call zeroext i1 @parameter_flash_storage_block_is_valid(ptr noundef %0)
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.078 = phi ptr [ %6, %.lr.ph ], [ %0, %1 ]
  %3 = tail call i32 @parameter_flash_storage_block_get_length(ptr noundef %.078)
  %4 = zext i32 %3 to i64
  %5 = getelementptr inbounds i8, ptr %.078, i64 %4
  %6 = getelementptr inbounds i8, ptr %5, i64 12
  %7 = tail call zeroext i1 @parameter_flash_storage_block_is_valid(ptr noundef nonnull %6)
  br i1 %7, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.0.lcssa = phi ptr [ null, %1 ], [ %.078, %.lr.ph ]
  ret ptr %.0.lcssa
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @parameter_flash_storage_block_get_length(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @parameter_flash_storage_block_is_valid(ptr noundef) local_unnamed_addr #0

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass