llvm-6502/test/CodeGen/ARM/fold-const.ll

15 lines
370 B
LLVM
Raw Normal View History

; RUN: llc < %s -march=arm -mattr=+v7 | FileCheck %s
define i32 @f(i32 %a) nounwind readnone optsize ssp {
entry:
%conv = zext i32 %a to i64
%tmp1 = tail call i64 @llvm.ctlz.i64(i64 %conv, i1 true)
; CHECK: clz
; CHECK-NOT: adds
%cast = trunc i64 %tmp1 to i32
%sub = sub nsw i32 63, %cast
ret i32 %sub
}
declare i64 @llvm.ctlz.i64(i64, i1) nounwind readnone