; LLVM IR from beagleboard/librobotcontrol :: library/src/math (matrix)

; 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.rc_matrix_t = type { i32, i32, ptr, i32 }

@stderr = external global ptr, align 8
@.str.8 = external hidden unnamed_addr constant [56 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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)
declare i64 @llvm.expect.i64(i64, i64) #1

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #2

; 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
declare dso_local i32 @rc_matrix_zeros(ptr noundef, i32 noundef, i32 noundef) #3

; Function Attrs: nounwind uwtable
define dso_local i32 @rc_matrix_identity(ptr noundef %0, i32 noundef %1) #3 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = call i32 @rc_matrix_zeros(ptr noundef %8, i32 noundef %9, i32 noundef %10)
  %12 = icmp ne i32 %11, 0
  %13 = xor i1 %12, true
  %14 = xor i1 %13, true
  %15 = zext i1 %14 to i32
  %16 = sext i32 %15 to i64
  %17 = call i64 @llvm.expect.i64(i64 %16, i64 0)
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %19, label %22

19:                                               ; preds = %2
  %20 = load ptr, ptr @stderr, align 8, !tbaa !5
  %21 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %20, ptr noundef @.str.8) #4
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %42

22:                                               ; preds = %2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %23

23:                                               ; preds = %38, %22
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %27, label %41

27:                                               ; preds = %23
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.rc_matrix_t, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !11
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds ptr, ptr %30, i64 %32
  %34 = load ptr, ptr %33, align 8, !tbaa !5
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds double, ptr %34, i64 %36
  store double 1.000000e+00, ptr %37, align 8, !tbaa !13
  br label %38

38:                                               ; preds = %27
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %6, align 4, !tbaa !9
  br label %23, !llvm.loop !15

41:                                               ; preds = %23
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %42

42:                                               ; preds = %41, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %43 = load i32, ptr %3, align 4
  ret i32 %43
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(none) }
attributes #2 = { 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 = { 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 #4 = { 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 = !{!"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, !6, i64 8}
!12 = !{!"rc_matrix_t", !10, i64 0, !10, i64 4, !6, i64 8, !10, i64 16}
!13 = !{!14, !14, i64 0}
!14 = !{!"double", !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; 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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str.8 = external hidden unnamed_addr constant [56 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @rc_matrix_zeros(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @rc_matrix_identity(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = tail call i32 @rc_matrix_zeros(ptr noundef %0, i32 noundef %1, i32 noundef %1)
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %.preheader, label %8, !prof !5

.preheader:                                       ; preds = %2
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !6
  %wide.trip.count = zext nneg i32 %1 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %7 = icmp ult i32 %1, 4
  br i1 %7, label %.loopexit.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 2147483644
  br label %11

8:                                                ; preds = %2
  %9 = load ptr, ptr @stderr, align 8, !tbaa !12
  %10 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %9, ptr noundef nonnull @.str.8) #2
  br label %.loopexit

11:                                               ; preds = %11, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.3, %11 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.3, %11 ]
  %12 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = getelementptr inbounds double, ptr %13, i64 %indvars.iv
  store double 1.000000e+00, ptr %14, align 8, !tbaa !13
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %15 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv.next
  %16 = load ptr, ptr %15, align 8, !tbaa !12
  %17 = getelementptr inbounds double, ptr %16, i64 %indvars.iv.next
  store double 1.000000e+00, ptr %17, align 8, !tbaa !13
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %18 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv.next.1
  %19 = load ptr, ptr %18, align 8, !tbaa !12
  %20 = getelementptr inbounds double, ptr %19, i64 %indvars.iv.next.1
  store double 1.000000e+00, ptr %20, align 8, !tbaa !13
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %21 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv.next.2
  %22 = load ptr, ptr %21, align 8, !tbaa !12
  %23 = getelementptr inbounds double, ptr %22, i64 %indvars.iv.next.2
  store double 1.000000e+00, ptr %23, align 8, !tbaa !13
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %.loopexit.loopexit.unr-lcssa, label %11, !llvm.loop !15

.loopexit.loopexit.unr-lcssa:                     ; preds = %11, %.lr.ph
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.3, %11 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.loopexit, label %.epil.preheader

.epil.preheader:                                  ; preds = %.loopexit.loopexit.unr-lcssa, %.epil.preheader
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.epil.preheader ], [ %indvars.iv.unr, %.loopexit.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.epil.preheader ], [ 0, %.loopexit.loopexit.unr-lcssa ]
  %24 = getelementptr inbounds ptr, ptr %6, i64 %indvars.iv.epil
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  %26 = getelementptr inbounds double, ptr %25, i64 %indvars.iv.epil
  store double 1.000000e+00, ptr %26, align 8, !tbaa !13
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %.loopexit, label %.epil.preheader, !llvm.loop !17

.loopexit:                                        ; preds = %.loopexit.loopexit.unr-lcssa, %.epil.preheader, %.preheader, %8
  %.09 = phi i32 [ -1, %8 ], [ 0, %.preheader ], [ 0, %.epil.preheader ], [ 0, %.loopexit.loopexit.unr-lcssa ]
  ret i32 %.09
}

attributes #0 = { 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 #1 = { 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 = { cold 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 = !{!"branch_weights", !"expected", i32 2000, i32 1}
!6 = !{!7, !11, i64 8}
!7 = !{!"rc_matrix_t", !8, i64 0, !8, i64 4, !11, i64 8, !8, i64 16}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"double", !9, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LowerExpectIntrinsicPass,SROAPass,SimplifyCFGPass,TailCallElimPass