; LLVM IR from gaoshanlee193/riscv-vector4wireless-extension :: toolchain/benchmark/env/v (string)

; 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: 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: nounwind uwtable
define dso_local i32 @strcmp(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i8, align 1
  %6 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #2
  br label %7

7:                                                ; preds = %24, %2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %8, i32 1
  store ptr %9, ptr %3, align 8, !tbaa !5
  %10 = load i8, ptr %8, align 1, !tbaa !9
  store i8 %10, ptr %5, align 1, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %11, i32 1
  store ptr %12, ptr %4, align 8, !tbaa !5
  %13 = load i8, ptr %11, align 1, !tbaa !9
  store i8 %13, ptr %6, align 1, !tbaa !9
  br label %14

14:                                               ; preds = %7
  %15 = load i8, ptr %5, align 1, !tbaa !9
  %16 = zext i8 %15 to i32
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %24

18:                                               ; preds = %14
  %19 = load i8, ptr %5, align 1, !tbaa !9
  %20 = zext i8 %19 to i32
  %21 = load i8, ptr %6, align 1, !tbaa !9
  %22 = zext i8 %21 to i32
  %23 = icmp eq i32 %20, %22
  br label %24

24:                                               ; preds = %18, %14
  %25 = phi i1 [ false, %14 ], [ %23, %18 ]
  br i1 %25, label %7, label %26, !llvm.loop !10

26:                                               ; preds = %24
  %27 = load i8, ptr %5, align 1, !tbaa !9
  %28 = zext i8 %27 to i32
  %29 = load i8, ptr %6, align 1, !tbaa !9
  %30 = zext i8 %29 to i32
  %31 = sub nsw i32 %28, %30
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  ret i32 %31
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 -255, 256) i32 @strcmp(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %3, %2
  %.06 = phi ptr [ %1, %2 ], [ %6, %3 ]
  %.0 = phi ptr [ %0, %2 ], [ %4, %3 ]
  %4 = getelementptr inbounds i8, ptr %.0, i64 1
  %5 = load i8, ptr %.0, align 1, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.06, i64 1
  %7 = load i8, ptr %.06, align 1, !tbaa !5
  %8 = icmp ne i8 %5, 0
  %9 = icmp eq i8 %5, %7
  %10 = select i1 %8, i1 %9, i1 false
  br i1 %10, label %3, label %11, !llvm.loop !8

11:                                               ; preds = %3
  %12 = zext i8 %7 to i32
  %13 = zext i8 %5 to i32
  %14 = sub nsw i32 %13, %12
  ret i32 %14
}

attributes #0 = { nofree norecurse nosync nounwind 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/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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