; LLVM IR from BrunoLevy/learn-fpga :: FemtoRV/SIM/FPU_funcs.ll (Z20FSGNJN_WITH_SOFT_FPUjj)

; 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.IEEE754 = type { %union.anon }
%union.anon = type { i32 }

; 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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z20FSGNJN_WITH_SOFT_FPUjj(i32 noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %class.IEEE754, align 4
  %6 = alloca %class.IEEE754, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %7 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4) %5, i32 noundef %7)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load i32, ptr %4, align 4, !tbaa !5
  call void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4) %6, i32 noundef %8)
  %9 = getelementptr inbounds %class.IEEE754, ptr %6, i32 0, i32 0
  %10 = load i32, ptr %9, align 4
  %11 = lshr i32 %10, 31
  %12 = icmp ne i32 %11, 0
  %13 = xor i1 %12, true
  %14 = zext i1 %13 to i32
  %15 = getelementptr inbounds %class.IEEE754, ptr %5, i32 0, i32 0
  %16 = load i32, ptr %15, align 4
  %17 = and i32 %14, 1
  %18 = shl i32 %17, 31
  %19 = and i32 %16, 2147483647
  %20 = or i32 %19, %18
  store i32 %20, ptr %15, align 4
  %21 = getelementptr inbounds %class.IEEE754, ptr %5, i32 0, i32 0
  %22 = load i32, ptr %21, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %22
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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"

%class.IEEE754 = type { %union.anon }
%union.anon = type { i32 }

; 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: mustprogress nounwind uwtable
declare dso_local void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4), i32 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z20FSGNJN_WITH_SOFT_FPUjj(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca %class.IEEE754, align 4
  %4 = alloca %class.IEEE754, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #2
  call void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4) %3, i32 noundef %0)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #2
  call void @_ZN7IEEE754C2Ej(ptr noundef nonnull align 4 dereferenceable(4) %4, i32 noundef %1)
  %5 = load i32, ptr %4, align 4
  %6 = load i32, ptr %3, align 4
  %7 = and i32 %5, -2147483648
  %8 = and i32 %6, 2147483647
  %9 = or disjoint i32 %8, %7
  %10 = xor i32 %9, -2147483648
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #2
  ret i32 %10
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 #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)"}


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