; LLVM IR from gem5/gem5 :: ext/softfloat (s_sub1XM)

; 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"

; Function Attrs: nounwind uwtable
define dso_local void @softfloat_sub1XM(i8 noundef zeroext %0, ptr noundef %1) #0 {
  %3 = alloca i8, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i8 %0, ptr %3, align 1, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %5, align 4, !tbaa !10
  %8 = load i8, ptr %3, align 1, !tbaa !5
  %9 = zext i8 %8 to i32
  %10 = sub nsw i32 %9, 1
  store i32 %10, ptr %6, align 4, !tbaa !10
  br label %11

11:                                               ; preds = %30, %2
  %12 = load ptr, ptr %4, align 8, !tbaa !8
  %13 = load i32, ptr %5, align 4, !tbaa !10
  %14 = zext i32 %13 to i64
  %15 = getelementptr inbounds i32, ptr %12, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !10
  store i32 %16, ptr %7, align 4, !tbaa !10
  %17 = load i32, ptr %7, align 4, !tbaa !10
  %18 = sub i32 %17, 1
  %19 = load ptr, ptr %4, align 8, !tbaa !8
  %20 = load i32, ptr %5, align 4, !tbaa !10
  %21 = zext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %19, i64 %21
  store i32 %18, ptr %22, align 4, !tbaa !10
  %23 = load i32, ptr %7, align 4, !tbaa !10
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %29, label %25

25:                                               ; preds = %11
  %26 = load i32, ptr %5, align 4, !tbaa !10
  %27 = load i32, ptr %6, align 4, !tbaa !10
  %28 = icmp eq i32 %26, %27
  br i1 %28, label %29, label %30

29:                                               ; preds = %25, %11
  br label %33

30:                                               ; preds = %25
  %31 = load i32, ptr %5, align 4, !tbaa !10
  %32 = add i32 %31, 1
  store i32 %32, ptr %5, align 4, !tbaa !10
  br label %11

33:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !6, 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"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @softfloat_sub1XM(i8 noundef zeroext %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = zext i8 %0 to i32
  %4 = add nsw i32 %3, -1
  br label %5

5:                                                ; preds = %5, %2
  %.0 = phi i32 [ 0, %2 ], [ %11, %5 ]
  %6 = zext i32 %.0 to i64
  %7 = getelementptr inbounds i32, ptr %1, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = add i32 %8, -1
  store i32 %9, ptr %7, align 4, !tbaa !5
  %.not = icmp ne i32 %8, 0
  %10 = icmp eq i32 %.0, %4
  %or.cond = select i1 %.not, i1 true, i1 %10
  %11 = add i32 %.0, 1
  br i1 %or.cond, label %12, label %5

12:                                               ; preds = %5
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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