; LLVM IR from lfarcaro/ARINC653_ARMV7A_Z7000 :: ARINC653_ARMV7A_Z7000.sw/ARINC653_ARMV7A_Z7000_bsp/ps7_cortexa9_0/libsrc (LookupConfig)

; 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"

%struct.XDmaPs_Config = type { i16, i32 }

@XDmaPs_ConfigTable = external global [0 x %struct.XDmaPs_Config], align 4

; Function Attrs: nounwind uwtable
define dso_local ptr @XDmaPs_LookupConfig(i16 noundef zeroext %0) #0 {
  %2 = alloca i16, align 2
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store i16 %0, ptr %2, align 2, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store ptr null, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !11
  br label %5

5:                                                ; preds = %23, %1
  %6 = load i32, ptr %4, align 4, !tbaa !11
  %7 = icmp slt i32 %6, 2
  br i1 %7, label %8, label %26

8:                                                ; preds = %5
  %9 = load i32, ptr %4, align 4, !tbaa !11
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [0 x %struct.XDmaPs_Config], ptr @XDmaPs_ConfigTable, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.XDmaPs_Config, ptr %11, i32 0, i32 0
  %13 = load i16, ptr %12, align 4, !tbaa !13
  %14 = zext i16 %13 to i32
  %15 = load i16, ptr %2, align 2, !tbaa !5
  %16 = zext i16 %15 to i32
  %17 = icmp eq i32 %14, %16
  br i1 %17, label %18, label %22

18:                                               ; preds = %8
  %19 = load i32, ptr %4, align 4, !tbaa !11
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [0 x %struct.XDmaPs_Config], ptr @XDmaPs_ConfigTable, i64 0, i64 %20
  store ptr %21, ptr %3, align 8, !tbaa !9
  br label %26

22:                                               ; preds = %8
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %4, align 4, !tbaa !11
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %4, align 4, !tbaa !11
  br label %5, !llvm.loop !15

26:                                               ; preds = %18, %5
  %27 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret ptr %27
}

; 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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"", !6, i64 0, !12, i64 4}
!15 = distinct !{!15, !16}
!16 = !{!"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"

%struct.XDmaPs_Config = type { i16, i32 }

@XDmaPs_ConfigTable = external global [0 x %struct.XDmaPs_Config], align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local ptr @XDmaPs_LookupConfig(i16 noundef zeroext %0) local_unnamed_addr #0 {
  %2 = load i16, ptr @XDmaPs_ConfigTable, align 4, !tbaa !5
  %3 = icmp eq i16 %2, %0
  br i1 %3, label %7, label %4

4:                                                ; preds = %1
  %5 = load i16, ptr getelementptr inbounds (i8, ptr @XDmaPs_ConfigTable, i64 8), align 4, !tbaa !5
  %6 = icmp eq i16 %5, %0
  %spec.select = select i1 %6, ptr getelementptr inbounds (i8, ptr @XDmaPs_ConfigTable, i64 8), ptr null
  br label %7

7:                                                ; preds = %4, %1
  %.05 = phi ptr [ @XDmaPs_ConfigTable, %1 ], [ %spec.select, %4 ]
  ret ptr %.05
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !10, i64 4}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass