; LLVM IR from GPUOpen-LibrariesAndSDKs/TAN :: tan/common/fifo.ll (ZN10FifoBuffer7putBackEj)

; 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.FifoBuffer = type <{ ptr, i32, i32, i32, [4 x i8] }>

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_ZN10FifoBuffer7putBackEj(ptr noundef nonnull align 8 dereferenceable(20) %0, i32 noundef %1) #0 align 2 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = getelementptr inbounds %class.FifoBuffer, ptr %6, i32 0, i32 1
  %9 = load i32, ptr %8, align 8, !tbaa !11
  %10 = icmp ugt i32 %7, %9
  br i1 %10, label %14, label %11

11:                                               ; preds = %2
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp ult i32 %12, 0
  br i1 %13, label %14, label %15

14:                                               ; preds = %11, %2
  store i1 false, ptr %3, align 1
  br label %31

15:                                               ; preds = %11
  %16 = getelementptr inbounds %class.FifoBuffer, ptr %6, i32 0, i32 2
  %17 = load i32, ptr %16, align 4, !tbaa !13
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = icmp ult i32 %17, %18
  br i1 %19, label %20, label %26

20:                                               ; preds = %15
  %21 = getelementptr inbounds %class.FifoBuffer, ptr %6, i32 0, i32 1
  %22 = load i32, ptr %21, align 8, !tbaa !11
  %23 = getelementptr inbounds %class.FifoBuffer, ptr %6, i32 0, i32 2
  %24 = load i32, ptr %23, align 4, !tbaa !13
  %25 = add i32 %24, %22
  store i32 %25, ptr %23, align 4, !tbaa !13
  br label %26

26:                                               ; preds = %20, %15
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = getelementptr inbounds %class.FifoBuffer, ptr %6, i32 0, i32 2
  %29 = load i32, ptr %28, align 4, !tbaa !13
  %30 = sub i32 %29, %27
  store i32 %30, ptr %28, align 4, !tbaa !13
  store i1 true, ptr %3, align 1
  br label %31

31:                                               ; preds = %26, %14
  %32 = load i1, ptr %3, align 1
  ret i1 %32
}

attributes #0 = { 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" }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTS10FifoBuffer", !6, i64 0, !10, i64 8, !10, i64 12, !10, i64 16}
!13 = !{!12, !10, i64 12}


; 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: readwrite) uwtable
define dso_local noundef zeroext i1 @_ZN10FifoBuffer7putBackEj(ptr nocapture noundef nonnull align 8 dereferenceable(20) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp uge i32 %4, %1
  br i1 %5, label %6, label %12

6:                                                ; preds = %2
  %7 = getelementptr inbounds i8, ptr %0, i64 12
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = icmp ult i32 %8, %1
  %10 = select i1 %9, i32 %4, i32 0
  %spec.select = add i32 %8, %10
  %11 = sub i32 %spec.select, %1
  store i32 %11, ptr %7, align 4, !tbaa !11
  br label %12

12:                                               ; preds = %2, %6
  ret i1 %5
}

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, !10, i64 8}
!6 = !{!"_ZTS10FifoBuffer", !7, i64 0, !10, i64 8, !10, i64 12, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 12}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass