; LLVM IR from graycatlabs/serbus :: examples (i2c_htu21d)

; 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"

@.str = external hidden unnamed_addr constant [32 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

declare i32 @I2C_setSlaveAddress(i32 noundef, i32 noundef) #1

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #2

declare i32 @I2C_readTransaction(i32 noundef, i8 noundef zeroext, ptr noundef, i32 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #3

; 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
define dso_local float @getRH(i32 noundef %0) #4 {
  %2 = alloca i32, align 4
  %3 = alloca [3 x i8], align 1
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 3, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = call i32 @I2C_setSlaveAddress(i32 noundef %5, i32 noundef 64)
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %8, label %10

8:                                                ; preds = %1
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef 64)
  call void @exit(i32 noundef 0) #6
  unreachable

10:                                               ; preds = %1
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = getelementptr inbounds [3 x i8], ptr %3, i64 0, i64 0
  %13 = call i32 @I2C_readTransaction(i32 noundef %11, i8 noundef zeroext -27, ptr noundef %12, i32 noundef 3)
  %14 = getelementptr inbounds [3 x i8], ptr %3, i64 0, i64 0
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = zext i8 %15 to i32
  %17 = shl i32 %16, 8
  %18 = getelementptr inbounds [3 x i8], ptr %3, i64 0, i64 1
  %19 = load i8, ptr %18, align 1, !tbaa !9
  %20 = zext i8 %19 to i32
  %21 = or i32 %17, %20
  store i32 %21, ptr %4, align 4, !tbaa !5
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = and i32 %22, -4
  store i32 %23, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = sitofp i32 %24 to double
  %26 = fdiv double %25, 6.553600e+04
  %27 = call double @llvm.fmuladd.f64(double 1.250000e+02, double %26, double -6.000000e+00)
  %28 = fptrunc double %27 to float
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 3, ptr %3) #5
  ret float %28
}

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 = { noreturn 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 #5 = { nounwind }
attributes #6 = { noreturn 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!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 = external hidden unnamed_addr constant [32 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

declare i32 @I2C_setSlaveAddress(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #3

declare i32 @I2C_readTransaction(i32 noundef, i8 noundef zeroext, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #4

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

; Function Attrs: nounwind uwtable
define dso_local float @getRH(i32 noundef %0) local_unnamed_addr #5 {
  %2 = alloca [3 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 3, ptr nonnull %2) #6
  %3 = tail call i32 @I2C_setSlaveAddress(i32 noundef %0, i32 noundef 64) #6
  %4 = icmp slt i32 %3, 0
  br i1 %4, label %5, label %7

5:                                                ; preds = %1
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef 64)
  tail call void @exit(i32 noundef 0) #7
  unreachable

7:                                                ; preds = %1
  %8 = call i32 @I2C_readTransaction(i32 noundef %0, i8 noundef zeroext -27, ptr noundef nonnull %2, i32 noundef 3) #6
  %9 = load i8, ptr %2, align 1, !tbaa !5
  %10 = zext i8 %9 to i32
  %11 = shl nuw nsw i32 %10, 8
  %12 = getelementptr inbounds i8, ptr %2, i64 1
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = and i8 %13, -4
  %.masked = zext i8 %14 to i32
  %15 = or disjoint i32 %11, %.masked
  %16 = uitofp nneg i32 %15 to double
  %17 = fmul double %16, 0x3EF0000000000000
  %18 = call double @llvm.fmuladd.f64(double %17, double 1.250000e+02, double -6.000000e+00)
  %19 = fptrunc double %18 to float
  call void @llvm.lifetime.end.p0(i64 3, ptr nonnull %2) #6
  ret float %19
}

attributes #0 = { mustprogress 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 = { 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 #3 = { noreturn 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 #4 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { 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 #6 = { nounwind }
attributes #7 = { noreturn 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,TailCallElimPass