; LLVM IR from google/esh :: examples/emulation/riscv-64/platform/uart/uart.ll (Z4getcv)

; 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 noundef i32 @_Z4getcv() #0 {
  %1 = alloca i32, align 4
  %2 = load i8, ptr inttoptr (i64 268435461 to ptr), align 1, !tbaa !5
  %3 = zext i8 %2 to i32
  %4 = and i32 %3, 1
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %6, label %9

6:                                                ; preds = %0
  %7 = load i8, ptr inttoptr (i64 268435456 to ptr), align 1, !tbaa !5
  %8 = zext i8 %7 to i32
  store i32 %8, ptr %1, align 4
  br label %10

9:                                                ; preds = %0
  store i32 -1, ptr %1, align 4
  br label %10

10:                                               ; preds = %9, %6
  %11 = load i32, ptr %1, align 4
  ret i32 %11
}

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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 -1, 256) i32 @_Z4getcv() local_unnamed_addr #0 {
  %1 = load i8, ptr inttoptr (i64 268435461 to ptr), align 1, !tbaa !5
  %2 = and i8 %1, 1
  %.not = icmp eq i8 %2, 0
  br i1 %.not, label %6, label %3

3:                                                ; preds = %0
  %4 = load i8, ptr inttoptr (i64 268435456 to ptr), align 268435456, !tbaa !5
  %5 = zext i8 %4 to i32
  br label %6

6:                                                ; preds = %0, %3
  %.0 = phi i32 [ %5, %3 ], [ -1, %0 ]
  ret i32 %.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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


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