; LLVM IR from ARMmbed/mbed-crypto :: library (des)

; 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"

@odd_parity_table = external hidden constant [128 x i8], align 16

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

4:                                                ; preds = %22, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 8
  br i1 %6, label %7, label %25

7:                                                ; preds = %4
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds i8, ptr %8, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %13 = zext i8 %12 to i32
  %14 = sdiv i32 %13, 2
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %18, i64 %20
  store i8 %17, ptr %21, align 1, !tbaa !11
  br label %22

22:                                               ; preds = %7
  %23 = load i32, ptr %3, align 4, !tbaa !9
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !12

25:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

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

@odd_parity_table = external hidden local_unnamed_addr constant [128 x i8], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local void @mbedtls_des_key_set_parity(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %3 = lshr i8 %2, 1
  %4 = zext nneg i8 %3 to i64
  %5 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %4
  %6 = load i8, ptr %5, align 1, !tbaa !5
  store i8 %6, ptr %0, align 1, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 1
  %8 = load i8, ptr %7, align 1, !tbaa !5
  %9 = lshr i8 %8, 1
  %10 = zext nneg i8 %9 to i64
  %11 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !5
  store i8 %12, ptr %7, align 1, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %0, i64 2
  %14 = load i8, ptr %13, align 1, !tbaa !5
  %15 = lshr i8 %14, 1
  %16 = zext nneg i8 %15 to i64
  %17 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %16
  %18 = load i8, ptr %17, align 1, !tbaa !5
  store i8 %18, ptr %13, align 1, !tbaa !5
  %19 = getelementptr inbounds i8, ptr %0, i64 3
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = lshr i8 %20, 1
  %22 = zext nneg i8 %21 to i64
  %23 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !5
  store i8 %24, ptr %19, align 1, !tbaa !5
  %25 = getelementptr inbounds i8, ptr %0, i64 4
  %26 = load i8, ptr %25, align 1, !tbaa !5
  %27 = lshr i8 %26, 1
  %28 = zext nneg i8 %27 to i64
  %29 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %28
  %30 = load i8, ptr %29, align 1, !tbaa !5
  store i8 %30, ptr %25, align 1, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %0, i64 5
  %32 = load i8, ptr %31, align 1, !tbaa !5
  %33 = lshr i8 %32, 1
  %34 = zext nneg i8 %33 to i64
  %35 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %34
  %36 = load i8, ptr %35, align 1, !tbaa !5
  store i8 %36, ptr %31, align 1, !tbaa !5
  %37 = getelementptr inbounds i8, ptr %0, i64 6
  %38 = load i8, ptr %37, align 1, !tbaa !5
  %39 = lshr i8 %38, 1
  %40 = zext nneg i8 %39 to i64
  %41 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %40
  %42 = load i8, ptr %41, align 1, !tbaa !5
  store i8 %42, ptr %37, align 1, !tbaa !5
  %43 = getelementptr inbounds i8, ptr %0, i64 7
  %44 = load i8, ptr %43, align 1, !tbaa !5
  %45 = lshr i8 %44, 1
  %46 = zext nneg i8 %45 to i64
  %47 = getelementptr inbounds [128 x i8], ptr @odd_parity_table, i64 0, i64 %46
  %48 = load i8, ptr %47, align 1, !tbaa !5
  store i8 %48, ptr %43, align 1, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


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