; LLVM IR from gokcehan/pns :: generators/gridgen-patched (gridgen)

; 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"

@seed = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local float @randy() #0 {
  %1 = load i32, ptr @seed, align 4, !tbaa !5
  %2 = mul nsw i32 16807, %1
  %3 = srem i32 %2, 2147483647
  store i32 %3, ptr @seed, align 4, !tbaa !5
  %4 = load i32, ptr @seed, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %6, label %9

6:                                                ; preds = %0
  %7 = load i32, ptr @seed, align 4, !tbaa !5
  %8 = sub nsw i32 0, %7
  store i32 %8, ptr @seed, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %6, %0
  %10 = load i32, ptr @seed, align 4, !tbaa !5
  %11 = sitofp i32 %10 to double
  %12 = fmul double %11, 0x3E00000000200064
  %13 = fptrunc double %12 to float
  ret float %13
}

attributes #0 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/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"

@seed = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local float @randy() local_unnamed_addr #0 {
  %1 = load i32, ptr @seed, align 4, !tbaa !5
  %2 = mul nsw i32 %1, 16807
  %3 = srem i32 %2, 2147483647
  %spec.select = tail call i32 @llvm.abs.i32(i32 %3, i1 true)
  store i32 %spec.select, ptr @seed, align 4, !tbaa !5
  %4 = uitofp nneg i32 %spec.select to double
  %5 = fmul double %4, 0x3E00000000200064
  %6 = fptrunc double %5 to float
  ret float %6
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SimplifyCFGPass,TailCallElimPass