; LLVM IR from tleonhardt/practical_cryptography_engineering :: mbedtls (sha256)

; 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.mbedtls_sha256_context = type { [2 x i32], [8 x i32], [64 x i8], i32 }

; Function Attrs: nounwind uwtable
define dso_local void @mbedtls_sha256_starts(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %5, i32 0, i32 0
  %7 = getelementptr inbounds [2 x i32], ptr %6, i64 0, i64 0
  store i32 0, ptr %7, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %8, i32 0, i32 0
  %10 = getelementptr inbounds [2 x i32], ptr %9, i64 0, i64 1
  store i32 0, ptr %10, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %38

13:                                               ; preds = %2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %14, i32 0, i32 1
  %16 = getelementptr inbounds [8 x i32], ptr %15, i64 0, i64 0
  store i32 1779033703, ptr %16, align 4, !tbaa !9
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %17, i32 0, i32 1
  %19 = getelementptr inbounds [8 x i32], ptr %18, i64 0, i64 1
  store i32 -1150833019, ptr %19, align 4, !tbaa !9
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %20, i32 0, i32 1
  %22 = getelementptr inbounds [8 x i32], ptr %21, i64 0, i64 2
  store i32 1013904242, ptr %22, align 4, !tbaa !9
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %23, i32 0, i32 1
  %25 = getelementptr inbounds [8 x i32], ptr %24, i64 0, i64 3
  store i32 -1521486534, ptr %25, align 4, !tbaa !9
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %26, i32 0, i32 1
  %28 = getelementptr inbounds [8 x i32], ptr %27, i64 0, i64 4
  store i32 1359893119, ptr %28, align 4, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %29, i32 0, i32 1
  %31 = getelementptr inbounds [8 x i32], ptr %30, i64 0, i64 5
  store i32 -1694144372, ptr %31, align 4, !tbaa !9
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %32, i32 0, i32 1
  %34 = getelementptr inbounds [8 x i32], ptr %33, i64 0, i64 6
  store i32 528734635, ptr %34, align 4, !tbaa !9
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %35, i32 0, i32 1
  %37 = getelementptr inbounds [8 x i32], ptr %36, i64 0, i64 7
  store i32 1541459225, ptr %37, align 4, !tbaa !9
  br label %63

38:                                               ; preds = %2
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %39, i32 0, i32 1
  %41 = getelementptr inbounds [8 x i32], ptr %40, i64 0, i64 0
  store i32 -1056596264, ptr %41, align 4, !tbaa !9
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %42, i32 0, i32 1
  %44 = getelementptr inbounds [8 x i32], ptr %43, i64 0, i64 1
  store i32 914150663, ptr %44, align 4, !tbaa !9
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %45, i32 0, i32 1
  %47 = getelementptr inbounds [8 x i32], ptr %46, i64 0, i64 2
  store i32 812702999, ptr %47, align 4, !tbaa !9
  %48 = load ptr, ptr %3, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %48, i32 0, i32 1
  %50 = getelementptr inbounds [8 x i32], ptr %49, i64 0, i64 3
  store i32 -150054599, ptr %50, align 4, !tbaa !9
  %51 = load ptr, ptr %3, align 8, !tbaa !5
  %52 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %51, i32 0, i32 1
  %53 = getelementptr inbounds [8 x i32], ptr %52, i64 0, i64 4
  store i32 -4191439, ptr %53, align 4, !tbaa !9
  %54 = load ptr, ptr %3, align 8, !tbaa !5
  %55 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %54, i32 0, i32 1
  %56 = getelementptr inbounds [8 x i32], ptr %55, i64 0, i64 5
  store i32 1750603025, ptr %56, align 4, !tbaa !9
  %57 = load ptr, ptr %3, align 8, !tbaa !5
  %58 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %57, i32 0, i32 1
  %59 = getelementptr inbounds [8 x i32], ptr %58, i64 0, i64 6
  store i32 1694076839, ptr %59, align 4, !tbaa !9
  %60 = load ptr, ptr %3, align 8, !tbaa !5
  %61 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %60, i32 0, i32 1
  %62 = getelementptr inbounds [8 x i32], ptr %61, i64 0, i64 7
  store i32 -1090891868, ptr %62, align 4, !tbaa !9
  br label %63

63:                                               ; preds = %38, %13
  %64 = load i32, ptr %4, align 4, !tbaa !9
  %65 = load ptr, ptr %3, align 8, !tbaa !5
  %66 = getelementptr inbounds %struct.mbedtls_sha256_context, ptr %65, i32 0, i32 3
  store i32 %64, ptr %66, align 4, !tbaa !11
  ret void
}

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 = !{!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 = !{!12, !10, i64 104}
!12 = !{!"", !7, i64 0, !7, i64 8, !7, i64 40, !10, i64 104}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @mbedtls_sha256_starts(ptr nocapture noundef writeonly %0, i32 noundef %1) local_unnamed_addr #0 {
  store i32 0, ptr %0, align 4, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %0, i64 4
  store i32 0, ptr %3, align 4, !tbaa !5
  %4 = icmp eq i32 %1, 0
  %5 = select i1 %4, <4 x i32> <i32 1779033703, i32 -1150833019, i32 1013904242, i32 -1521486534>, <4 x i32> <i32 -1056596264, i32 914150663, i32 812702999, i32 -150054599>
  %6 = select i1 %4, <4 x i32> <i32 1359893119, i32 -1694144372, i32 528734635, i32 1541459225>, <4 x i32> <i32 -4191439, i32 1750603025, i32 1694076839, i32 -1090891868>
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  store <4 x i32> %5, ptr %7, align 4
  %8 = getelementptr inbounds i8, ptr %0, i64 24
  store <4 x i32> %6, ptr %8, align 4
  %9 = getelementptr inbounds i8, ptr %0, i64 104
  store i32 %1, ptr %9, align 4, !tbaa !9
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 104}
!10 = !{!"", !7, i64 0, !7, i64 8, !7, i64 40, !6, i64 104}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass