; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R3Shapes (ply)

; 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: mustprogress nounwind uwtable
define dso_local i32 @equal_strings(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %27, %2
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = load i8, ptr %7, align 1, !tbaa !9
  %9 = icmp ne i8 %8, 0
  br i1 %9, label %10, label %14

10:                                               ; preds = %6
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !9
  %13 = icmp ne i8 %12, 0
  br label %14

14:                                               ; preds = %10, %6
  %15 = phi i1 [ false, %6 ], [ %13, %10 ]
  br i1 %15, label %16, label %28

16:                                               ; preds = %14
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds i8, ptr %17, i32 1
  store ptr %18, ptr %4, align 8, !tbaa !5
  %19 = load i8, ptr %17, align 1, !tbaa !9
  %20 = sext i8 %19 to i32
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i32 1
  store ptr %22, ptr %5, align 8, !tbaa !5
  %23 = load i8, ptr %21, align 1, !tbaa !9
  %24 = sext i8 %23 to i32
  %25 = icmp ne i32 %20, %24
  br i1 %25, label %26, label %27

26:                                               ; preds = %16
  store i32 0, ptr %3, align 4
  br label %38

27:                                               ; preds = %16
  br label %6, !llvm.loop !10

28:                                               ; preds = %14
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load i8, ptr %29, align 1, !tbaa !9
  %31 = sext i8 %30 to i32
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load i8, ptr %32, align 1, !tbaa !9
  %34 = sext i8 %33 to i32
  %35 = icmp ne i32 %31, %34
  br i1 %35, label %36, label %37

36:                                               ; preds = %28
  store i32 0, ptr %3, align 4
  br label %38

37:                                               ; preds = %28
  store i32 1, ptr %3, align 4
  br label %38

38:                                               ; preds = %37, %36, %26
  %39 = load i32, ptr %3, align 4
  ret i32 %39
}

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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 2) i32 @equal_strings(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %5, %2
  %.06 = phi ptr [ %0, %2 ], [ %6, %5 ]
  %.0 = phi ptr [ %1, %2 ], [ %7, %5 ]
  %4 = load i8, ptr %.06, align 1, !tbaa !5
  %.not = icmp eq i8 %4, 0
  %.pre = load i8, ptr %.0, align 1, !tbaa !5
  %.not10 = icmp eq i8 %.pre, 0
  %or.cond = select i1 %.not, i1 true, i1 %.not10
  br i1 %or.cond, label %.critedge, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %.06, i64 1
  %7 = getelementptr inbounds i8, ptr %.0, i64 1
  %.not12 = icmp eq i8 %4, %.pre
  br i1 %.not12, label %3, label %.loopexit, !llvm.loop !8

.critedge:                                        ; preds = %3
  %.not11 = icmp eq i8 %4, %.pre
  %. = zext i1 %.not11 to i32
  br label %.loopexit

.loopexit:                                        ; preds = %5, %.critedge
  %.07 = phi i32 [ %., %.critedge ], [ 0, %5 ]
  ret i32 %.07
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass