; LLVM IR from trabucayre/openFPGALoader :: src/spiFlash.ll (ZN8SPIFlash18readVolatileCfgRegEv)

; 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"

%class.SPIFlash = type <{ ptr, ptr, i8, [3 x i8], i32, ptr, i8, [7 x i8] }>

@.str.131 = external hidden unnamed_addr constant [16 x i8], align 1

; 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

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i16 @_ZN8SPIFlash18readVolatileCfgRegEv(ptr noundef nonnull align 8 dereferenceable(33) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca [2 x i8], align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 2, ptr %3) #3
  %5 = getelementptr inbounds %class.SPIFlash, ptr %4, i32 0, i32 1
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  %8 = load ptr, ptr %6, align 8, !tbaa !13
  %9 = getelementptr inbounds ptr, ptr %8, i64 2
  %10 = load ptr, ptr %9, align 8
  %11 = call noundef i32 %10(ptr noundef nonnull align 8 dereferenceable(56) %6, i8 noundef zeroext -123, ptr noundef null, ptr noundef %7, i32 noundef 2)
  %12 = getelementptr inbounds %class.SPIFlash, ptr %4, i32 0, i32 2
  %13 = load i8, ptr %12, align 8, !tbaa !15
  %14 = sext i8 %13 to i32
  %15 = icmp sgt i32 %14, 0
  br i1 %15, label %16, label %24

16:                                               ; preds = %1
  %17 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  %18 = load i8, ptr %17, align 1, !tbaa !16
  %19 = zext i8 %18 to i32
  %20 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 1
  %21 = load i8, ptr %20, align 1, !tbaa !16
  %22 = zext i8 %21 to i32
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.131, i32 noundef %19, i32 noundef %22)
  br label %24

24:                                               ; preds = %16, %1
  %25 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 1
  %26 = load i8, ptr %25, align 1, !tbaa !16
  %27 = zext i8 %26 to i32
  %28 = shl i32 %27, 8
  %29 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  %30 = load i8, ptr %29, align 1, !tbaa !16
  %31 = zext i8 %30 to i32
  %32 = or i32 %28, %31
  %33 = trunc i32 %32 to i16
  call void @llvm.lifetime.end.p0(i64 2, ptr %3) #3
  ret i16 %33
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { 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 #3 = { 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++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTS8SPIFlash", !6, i64 8, !7, i64 16, !11, i64 20, !6, i64 24, !12, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"vtable pointer", !8, i64 0}
!15 = !{!10, !7, i64 16}
!16 = !{!7, !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.131 = external hidden unnamed_addr constant [16 x i8], align 1

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

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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i16 @_ZN8SPIFlash18readVolatileCfgRegEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(33) %0) local_unnamed_addr #2 align 2 {
  %2 = alloca [2 x i8], align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %2) #3
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %6 = getelementptr inbounds i8, ptr %5, i64 16
  %7 = load ptr, ptr %6, align 8
  %8 = call noundef i32 %7(ptr noundef nonnull align 8 dereferenceable(56) %4, i8 noundef zeroext -123, ptr noundef null, ptr noundef nonnull %2, i32 noundef 2)
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load i8, ptr %9, align 8, !tbaa !14
  %11 = icmp sgt i8 %10, 0
  br i1 %11, label %12, label %19

12:                                               ; preds = %1
  %13 = load i8, ptr %2, align 2, !tbaa !15
  %14 = zext i8 %13 to i32
  %15 = getelementptr inbounds i8, ptr %2, i64 1
  %16 = load i8, ptr %15, align 1, !tbaa !15
  %17 = zext i8 %16 to i32
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.131, i32 noundef %14, i32 noundef %17)
  br label %19

19:                                               ; preds = %12, %1
  %20 = load i16, ptr %2, align 2
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %2) #3
  ret i16 %20
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { 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, !7, i64 8}
!6 = !{!"_ZTS8SPIFlash", !7, i64 8, !8, i64 16, !10, i64 20, !7, i64 24, !11, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"bool", !8, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"vtable pointer", !9, i64 0}
!14 = !{!6, !8, i64 16}
!15 = !{!8, !8, i64 0}


; Effective O3 passes: AggressiveInstCombinePass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass