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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
;
; Test that the fls library call simplifier works correctly even for
; targets with 16-bit int. Although fls is available on a number of
; targets it's supported (hardcoded as available) only on FreeBSD.
;
; RUN: opt < %s -mtriple=avr-freebsd -passes=instcombine -S | FileCheck %s
; RUN: opt < %s -mtriple=msp430-freebsd -passes=instcombine -S | FileCheck %s
declare i16 @fls(i16)
declare void @sink(i16)
define void @fold_fls(i16 %x) {
; CHECK-LABEL: @fold_fls(
; CHECK-NEXT: call void @sink(i16 0)
; CHECK-NEXT: call void @sink(i16 1)
; CHECK-NEXT: [[CTLZ:%.*]] = call i16 @llvm.ctlz.i16(i16 [[X:%.*]], i1 false), !range [[RNG0:![0-9]+]]
; CHECK-NEXT: [[NX:%.*]] = sub nuw nsw i16 16, [[CTLZ]]
; CHECK-NEXT: call void @sink(i16 [[NX]])
; CHECK-NEXT: ret void
;
%n0 = call i16 @fls(i16 0)
call void @sink(i16 %n0)
%n1 = call i16 @fls(i16 1)
call void @sink(i16 %n1)
%nx = call i16 @fls(i16 %x)
call void @sink(i16 %nx)
ret void
}
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