File: clz.ll

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llvm 2.6-9.1
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; RUN: llvm-as < %s | llc -march=x86 | grep bsr | count 2
; RUN: llvm-as < %s | llc -march=x86 | grep bsf
; RUN: llvm-as < %s | llc -march=x86 | grep cmov | count 3

define i32 @t1(i32 %x) nounwind  {
	%tmp = tail call i32 @llvm.ctlz.i32( i32 %x )
	ret i32 %tmp
}

declare i32 @llvm.ctlz.i32(i32) nounwind readnone 

define i32 @t2(i32 %x) nounwind  {
	%tmp = tail call i32 @llvm.cttz.i32( i32 %x )
	ret i32 %tmp
}

declare i32 @llvm.cttz.i32(i32) nounwind readnone 

define i16 @t3(i16 %x, i16 %y) nounwind  {
entry:
        %tmp1 = add i16 %x, %y
	%tmp2 = tail call i16 @llvm.ctlz.i16( i16 %tmp1 )		; <i16> [#uses=1]
	ret i16 %tmp2
}

declare i16 @llvm.ctlz.i16(i16) nounwind readnone