strlcpy.ll

strlcpy.ll

target datalayout = "e-m:m-p:32:32-i8:8:32-i16:16:32-n32-S32"
target triple = "xxx-unknown-unknown"

; Function Attrs: noinline nounwind optnone
define dso_local i32 @strlcpy(i8* noundef %dst, i8* noundef %src, i32 noundef %dsize) #0 {
entry:
  %dst.addr = alloca i8*, align 4
  %src.addr = alloca i8*, align 4
  %dsize.addr = alloca i32, align 4
  %osrc = alloca i8*, align 4
  %nleft = alloca i32, align 4
  store i8* %dst, i8** %dst.addr, align 4
  store i8* %src, i8** %src.addr, align 4
  store i32 %dsize, i32* %dsize.addr, align 4
  %0 = load i8*, i8** %src.addr, align 4
  store i8* %0, i8** %osrc, align 4
  %1 = load i32, i32* %dsize.addr, align 4
  store i32 %1, i32* %nleft, align 4
  %2 = load i32, i32* %nleft, align 4
  %cmp = icmp ne i32 %2, 0
  br i1 %cmp, label %if.then, label %if.end6

if.then:                                          ; preds = %entry
  br label %while.cond

while.cond:                                       ; preds = %if.end, %if.then
  %3 = load i32, i32* %nleft, align 4
  %dec = add i32 %3, -1
  store i32 %dec, i32* %nleft, align 4
  %cmp1 = icmp ne i32 %dec, 0
  br i1 %cmp1, label %while.body, label %while.end

while.body:                                       ; preds = %while.cond
  %4 = load i8*, i8** %src.addr, align 4
  %incdec.ptr = getelementptr inbounds i8, i8* %4, i32 1
  store i8* %incdec.ptr, i8** %src.addr, align 4
  %5 = load i8, i8* %4, align 1
  %6 = load i8*, i8** %dst.addr, align 4
  %incdec.ptr2 = getelementptr inbounds i8, i8* %6, i32 1
  store i8* %incdec.ptr2, i8** %dst.addr, align 4
  store i8 %5, i8* %6, align 1
  %conv = sext i8 %5 to i32
  %cmp3 = icmp eq i32 %conv, 0
  br i1 %cmp3, label %if.then5, label %if.end

if.then5:                                         ; preds = %while.body
  br label %while.end

if.end:                                           ; preds = %while.body
  br label %while.cond, !llvm.loop !2

while.end:                                        ; preds = %if.then5, %while.cond
  br label %if.end6

if.end6:                                          ; preds = %while.end, %entry
  %7 = load i32, i32* %nleft, align 4
  %cmp7 = icmp eq i32 %7, 0
  br i1 %cmp7, label %if.then9, label %if.end18

if.then9:                                         ; preds = %if.end6
  %8 = load i32, i32* %dsize.addr, align 4
  %cmp10 = icmp ne i32 %8, 0
  br i1 %cmp10, label %if.then12, label %if.end13

if.then12:                                        ; preds = %if.then9
  %9 = load i8*, i8** %dst.addr, align 4
  store i8 0, i8* %9, align 1
  br label %if.end13

if.end13:                                         ; preds = %if.then12, %if.then9
  br label %while.cond14

while.cond14:                                     ; preds = %while.body16, %if.end13
  %10 = load i8*, i8** %src.addr, align 4
  %incdec.ptr15 = getelementptr inbounds i8, i8* %10, i32 1
  store i8* %incdec.ptr15, i8** %src.addr, align 4
  %11 = load i8, i8* %10, align 1
  %tobool = icmp ne i8 %11, 0
  br i1 %tobool, label %while.body16, label %while.end17

while.body16:                                     ; preds = %while.cond14
  br label %while.cond14, !llvm.loop !4

while.end17:                                      ; preds = %while.cond14
  br label %if.end18

if.end18:                                         ; preds = %while.end17, %if.end6
  %12 = load i8*, i8** %src.addr, align 4
  %13 = load i8*, i8** %osrc, align 4
  %sub.ptr.lhs.cast = ptrtoint i8* %12 to i32
  %sub.ptr.rhs.cast = ptrtoint i8* %13 to i32
  %sub.ptr.sub = sub i32 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
  %sub = sub nsw i32 %sub.ptr.sub, 1
  ret i32 %sub
}

attributes #0 = { noinline nounwind optnone "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="-long-calls" }

!llvm.module.flags = !{!0}
!llvm.ident = !{!1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 15.0.0 ( dd1b06a7c075ab0c0919aeb5383804d427e66182)"}
!2 = distinct !{!2, !3}
!3 = !{!"llvm.loop.mustprogress"}
!4 = distinct !{!4, !3}