; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/MatrixFunctions (arm_mat_sub_q15)

; 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.arm_matrix_instance_q15 = type { i16, i16, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @arm_mat_sub_q15(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.arm_matrix_instance_q15, ptr %13, i32 0, i32 2
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  store ptr %15, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.arm_matrix_instance_q15, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  store ptr %18, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.arm_matrix_instance_q15, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  store ptr %21, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.arm_matrix_instance_q15, ptr %22, i32 0, i32 0
  %24 = load i16, ptr %23, align 8, !tbaa !12
  %25 = zext i16 %24 to i32
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.arm_matrix_instance_q15, ptr %26, i32 0, i32 1
  %28 = load i16, ptr %27, align 2, !tbaa !13
  %29 = zext i16 %28 to i32
  %30 = mul i32 %25, %29
  store i32 %30, ptr %10, align 4, !tbaa !14
  %31 = load i32, ptr %10, align 4, !tbaa !14
  store i32 %31, ptr %11, align 4, !tbaa !14
  br label %32

32:                                               ; preds = %35, %3
  %33 = load i32, ptr %11, align 4, !tbaa !14
  %34 = icmp ugt i32 %33, 0
  br i1 %34, label %35, label %51

35:                                               ; preds = %32
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  %37 = getelementptr inbounds i16, ptr %36, i32 1
  store ptr %37, ptr %7, align 8, !tbaa !5
  %38 = load i16, ptr %36, align 2, !tbaa !16
  %39 = sext i16 %38 to i32
  %40 = load ptr, ptr %8, align 8, !tbaa !5
  %41 = getelementptr inbounds i16, ptr %40, i32 1
  store ptr %41, ptr %8, align 8, !tbaa !5
  %42 = load i16, ptr %40, align 2, !tbaa !16
  %43 = sext i16 %42 to i32
  %44 = sub nsw i32 %39, %43
  %45 = call i32 @__SSAT(i32 noundef %44, i32 noundef 16)
  %46 = trunc i32 %45 to i16
  %47 = load ptr, ptr %9, align 8, !tbaa !5
  %48 = getelementptr inbounds i16, ptr %47, i32 1
  store ptr %48, ptr %9, align 8, !tbaa !5
  store i16 %46, ptr %47, align 2, !tbaa !16
  %49 = load i32, ptr %11, align 4, !tbaa !14
  %50 = add i32 %49, -1
  store i32 %50, ptr %11, align 4, !tbaa !14
  br label %32, !llvm.loop !17

51:                                               ; preds = %32
  store i32 0, ptr %12, align 4, !tbaa !14
  %52 = load i32, ptr %12, align 4, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret i32 %52
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: alwaysinline nounwind uwtable
declare hidden i32 @__SSAT(i32 noundef, i32 noundef) #2

; 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 = { alwaysinline 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"", !11, i64 0, !11, i64 2, !6, i64 8}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 0}
!13 = !{!10, !11, i64 2}
!14 = !{!15, !15, i64 0}
!15 = !{!"int", !7, i64 0}
!16 = !{!11, !11, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @arm_mat_sub_q15(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = load i16, ptr %0, align 8, !tbaa !5
  %5 = zext i16 %4 to i32
  %6 = getelementptr inbounds i8, ptr %0, i64 2
  %7 = load i16, ptr %6, align 2, !tbaa !11
  %8 = zext i16 %7 to i32
  %9 = mul nuw i32 %8, %5
  %.not14 = icmp eq i32 %9, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %10 = getelementptr inbounds i8, ptr %2, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !12
  %12 = getelementptr inbounds i8, ptr %1, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %14 = getelementptr inbounds i8, ptr %0, i64 8
  %15 = load ptr, ptr %14, align 8, !tbaa !12
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.018 = phi ptr [ %16, %.lr.ph ], [ %15, %.lr.ph.preheader ]
  %.01117 = phi i32 [ %26, %.lr.ph ], [ %9, %.lr.ph.preheader ]
  %.01216 = phi ptr [ %19, %.lr.ph ], [ %13, %.lr.ph.preheader ]
  %.01315 = phi ptr [ %25, %.lr.ph ], [ %11, %.lr.ph.preheader ]
  %16 = getelementptr inbounds i8, ptr %.018, i64 2
  %17 = load i16, ptr %.018, align 2, !tbaa !13
  %18 = sext i16 %17 to i32
  %19 = getelementptr inbounds i8, ptr %.01216, i64 2
  %20 = load i16, ptr %.01216, align 2, !tbaa !13
  %21 = sext i16 %20 to i32
  %22 = sub nsw i32 %18, %21
  %23 = tail call i32 @__SSAT(i32 noundef %22, i32 noundef 16)
  %24 = trunc i32 %23 to i16
  %25 = getelementptr inbounds i8, ptr %.01315, i64 2
  store i16 %24, ptr %.01315, align 2, !tbaa !13
  %26 = add i32 %.01117, -1
  %.not = icmp eq i32 %26, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !14

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret i32 0
}

; Function Attrs: alwaysinline nounwind uwtable
declare hidden i32 @__SSAT(i32 noundef, i32 noundef) local_unnamed_addr #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 = { alwaysinline 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !7, i64 2, !10, i64 8}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 2}
!12 = !{!6, !10, i64 8}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass