; LLVM IR from AllAlgorithms/c :: algorithms/math/matrix-multiplication (matmul)

; 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"

@multi_result = external dso_local global [50 x [50 x double]], align 16
@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [47 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 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(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @DisplayMatrix() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = load ptr, ptr @stderr, align 8, !tbaa !5
  %5 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %4, ptr noundef @.str) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %31, %0
  %7 = load i32, ptr %1, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 50
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  br label %34

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %25, %10
  %12 = load i32, ptr %3, align 4, !tbaa !9
  %13 = icmp slt i32 %12, 50
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  store i32 5, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %28

15:                                               ; preds = %11
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  %17 = load i32, ptr %1, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [50 x [50 x double]], ptr @multi_result, i64 0, i64 %18
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [50 x double], ptr %19, i64 0, i64 %21
  %23 = load double, ptr %22, align 8, !tbaa !11
  %24 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str.1, double noundef %23) #3
  br label %25

25:                                               ; preds = %15
  %26 = load i32, ptr %3, align 4, !tbaa !9
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %3, align 4, !tbaa !9
  br label %11, !llvm.loop !13

28:                                               ; preds = %14
  %29 = load ptr, ptr @stderr, align 8, !tbaa !5
  %30 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %29, ptr noundef @.str.2) #3
  br label %31

31:                                               ; preds = %28
  %32 = load i32, ptr %1, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %1, align 4, !tbaa !9
  br label %6, !llvm.loop !15

34:                                               ; preds = %9
  ret void
}

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

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

!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, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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"

@multi_result = external dso_local local_unnamed_addr global [50 x [50 x double]], align 16
@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [47 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @DisplayMatrix() local_unnamed_addr #0 {
  %1 = load ptr, ptr @stderr, align 8, !tbaa !5
  %2 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %1, ptr noundef nonnull @.str) #2
  br label %.preheader

.preheader:                                       ; preds = %0, %4
  %indvars.iv10 = phi i64 [ 0, %0 ], [ %indvars.iv.next11, %4 ]
  br label %7

3:                                                ; preds = %4
  ret void

4:                                                ; preds = %7
  %5 = load ptr, ptr @stderr, align 8, !tbaa !5
  %6 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %5, ptr noundef nonnull @.str.2) #2
  %indvars.iv.next11 = add nuw nsw i64 %indvars.iv10, 1
  %exitcond13.not = icmp eq i64 %indvars.iv.next11, 50
  br i1 %exitcond13.not, label %3, label %.preheader, !llvm.loop !9

7:                                                ; preds = %.preheader, %7
  %indvars.iv = phi i64 [ 0, %.preheader ], [ %indvars.iv.next, %7 ]
  %8 = load ptr, ptr @stderr, align 8, !tbaa !5
  %9 = getelementptr inbounds [50 x [50 x double]], ptr @multi_result, i64 0, i64 %indvars.iv10, i64 %indvars.iv
  %10 = load double, ptr %9, align 8, !tbaa !11
  %11 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %8, ptr noundef nonnull @.str.1, double noundef %10) #2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 50
  br i1 %exitcond.not, label %4, label %7, !llvm.loop !13
}

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { 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 #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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !10}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass