2010-11-09-CountLeading.ll
730 Bytes
; RUN: llc -march=mips < %s | FileCheck %s
; CHECK: clz $2, $4
define i32 @t1(i32 %X) nounwind readnone {
entry:
%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %X, i1 true)
ret i32 %tmp1
}
declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
; CHECK: clz $2, $4
define i32 @t2(i32 %X) nounwind readnone {
entry:
%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %X, i1 true)
ret i32 %tmp1
}
; CHECK: clo $2, $4
define i32 @t3(i32 %X) nounwind readnone {
entry:
%neg = xor i32 %X, -1
%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %neg, i1 true)
ret i32 %tmp1
}
; CHECK: clo $2, $4
define i32 @t4(i32 %X) nounwind readnone {
entry:
%neg = xor i32 %X, -1
%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %neg, i1 true)
ret i32 %tmp1
}