; LLVM IR from BrunoLevy/learn-fpga :: LiteX/software/Tagl/Lib/gcomp.ll (ZN16GraphicComponent5IsSetEPc)

; 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"

@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN16GraphicComponent5IsSetEPc(ptr noundef nonnull align 8 dereferenceable(8624) %0, ptr noundef %1) #0 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = call ptr @getenv(ptr noundef %9) #4
  store ptr %10, ptr %6, align 8, !tbaa !5
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %24

13:                                               ; preds = %2
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = call i32 @strcmp(ptr noundef %14, ptr noundef @.str.1) #5
  %16 = icmp ne i32 %15, 0
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %25

18:                                               ; preds = %13
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = call i32 @strcmp(ptr noundef %19, ptr noundef @.str.2) #5
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  store i32 1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %25

23:                                               ; preds = %18
  br label %24

24:                                               ; preds = %23, %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %25

25:                                               ; preds = %24, %22, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %26 = load i32, ptr %3, align 4
  ret i32 %26
}

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

; Function Attrs: nounwind
declare ptr @getenv(ptr noundef) #2

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #3

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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 willreturn memory(read) "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 }
attributes #5 = { nounwind willreturn memory(read) }

!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"}


; 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"

@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nofree nounwind willreturn memory(read) uwtable
define dso_local noundef range(i32 0, 2) i32 @_ZN16GraphicComponent5IsSetEPc(ptr nocapture noundef nonnull readnone align 8 dereferenceable(8624) %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 align 2 {
  %3 = tail call ptr @getenv(ptr noundef %1) #3
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %8, label %4

4:                                                ; preds = %2
  %5 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %3, ptr noundef nonnull dereferenceable(1) @.str.1) #4
  %.not6 = icmp eq i32 %5, 0
  br i1 %.not6, label %9, label %6

6:                                                ; preds = %4
  %7 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %3, ptr noundef nonnull dereferenceable(1) @.str.2) #4
  %.not7 = icmp eq i32 %7, 0
  br i1 %.not7, label %9, label %8

8:                                                ; preds = %6, %2
  br label %9

9:                                                ; preds = %6, %4, %8
  %.0 = phi i32 [ 0, %8 ], [ 1, %4 ], [ 1, %6 ]
  ret i32 %.0
}

; Function Attrs: nofree nounwind memory(read)
declare noundef ptr @getenv(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(read) 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 memory(read) "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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 }
attributes #4 = { nounwind willreturn memory(read) }

!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)"}


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