; LLVM IR from aap/librw :: src/raster.ll (ZN2rw6Raster17getCurrentContextEv)

; 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.rw::RasterGlobals" = type { i32, [32 x ptr] }

@_ZN2rw18rasterModuleOffsetE = external dso_local global i32, align 4
@_ZN2rw6engineE = external global ptr, align 8

; 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: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN2rw6Raster17getCurrentContextEv() #1 align 2 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #2
  %4 = load ptr, ptr @_ZN2rw6engineE, align 8, !tbaa !5
  %5 = load i32, ptr @_ZN2rw18rasterModuleOffsetE, align 4, !tbaa !9
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds i8, ptr %4, i64 %6
  store ptr %7, ptr %2, align 8, !tbaa !5
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = getelementptr inbounds %"struct.rw::RasterGlobals", ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 8, !tbaa !11
  %11 = icmp slt i32 %10, 0
  br i1 %11, label %17, label %12

12:                                               ; preds = %0
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %"struct.rw::RasterGlobals", ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 8, !tbaa !11
  %16 = icmp sge i32 %15, 32
  br i1 %16, label %17, label %18

17:                                               ; preds = %12, %0
  store ptr null, ptr %1, align 8
  store i32 1, ptr %3, align 4
  br label %27

18:                                               ; preds = %12
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = getelementptr inbounds %"struct.rw::RasterGlobals", ptr %19, i32 0, i32 1
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = getelementptr inbounds %"struct.rw::RasterGlobals", ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !11
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [32 x ptr], ptr %20, i64 0, i64 %24
  %26 = load ptr, ptr %25, align 8, !tbaa !5
  store ptr %26, ptr %1, align 8
  store i32 1, ptr %3, align 4
  br label %27

27:                                               ; preds = %18, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #2
  %28 = load ptr, ptr %1, align 8
  ret ptr %28
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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" }
attributes #2 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTSN2rw13RasterGlobalsE", !10, i64 0, !7, i64 8}


; 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"

@_ZN2rw18rasterModuleOffsetE = external dso_local local_unnamed_addr global i32, align 4
@_ZN2rw6engineE = external local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @_ZN2rw6Raster17getCurrentContextEv() local_unnamed_addr #0 align 2 {
  %1 = load ptr, ptr @_ZN2rw6engineE, align 8, !tbaa !5
  %2 = load i32, ptr @_ZN2rw18rasterModuleOffsetE, align 4, !tbaa !9
  %3 = sext i32 %2 to i64
  %4 = getelementptr inbounds i8, ptr %1, i64 %3
  %5 = load i32, ptr %4, align 8, !tbaa !11
  %or.cond = icmp ugt i32 %5, 31
  br i1 %or.cond, label %11, label %6

6:                                                ; preds = %0
  %7 = getelementptr inbounds i8, ptr %4, i64 8
  %8 = zext nneg i32 %5 to i64
  %9 = getelementptr inbounds [32 x ptr], ptr %7, i64 0, i64 %8
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %0, %6
  %.0 = phi ptr [ %10, %6 ], [ null, %0 ]
  ret ptr %.0
}

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 = !{!"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 0}
!12 = !{!"_ZTSN2rw13RasterGlobalsE", !10, i64 0, !7, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass