1; RUN: opt -S -simplifycfg -mtriple=aarch64 < %s | FileCheck %s 2 3define i32 @ctlz(i32 %A) { 4; CHECK-LABEL: @ctlz( 5; CHECK: [[ICMP:%[A-Za-z0-9]+]] = icmp eq i32 %A, 0 6; CHECK-NEXT: [[CTZ:%[A-Za-z0-9]+]] = tail call i32 @llvm.ctlz.i32(i32 %A, i1 true) 7; CHECK-NEXT: [[SEL:%[A-Za-z0-9.]+]] = select i1 [[ICMP]], i32 32, i32 [[CTZ]] 8; CHECK-NEXT: ret i32 [[SEL]] 9entry: 10 %tobool = icmp eq i32 %A, 0 11 br i1 %tobool, label %cond.end, label %cond.true 12 13cond.true: 14 %0 = tail call i32 @llvm.ctlz.i32(i32 %A, i1 true) 15 br label %cond.end 16 17cond.end: 18 %cond = phi i32 [ %0, %cond.true ], [ 32, %entry ] 19 ret i32 %cond 20} 21 22define i32 @cttz(i32 %A) { 23; CHECK-LABEL: @cttz( 24; CHECK: [[ICMP:%[A-Za-z0-9]+]] = icmp eq i32 %A, 0 25; CHECK-NEXT: [[CTZ:%[A-Za-z0-9]+]] = tail call i32 @llvm.cttz.i32(i32 %A, i1 true) 26; CHECK-NEXT: [[SEL:%[A-Za-z0-9.]+]] = select i1 [[ICMP]], i32 32, i32 [[CTZ]] 27; CHECK-NEXT: ret i32 [[SEL]] 28entry: 29 %tobool = icmp eq i32 %A, 0 30 br i1 %tobool, label %cond.end, label %cond.true 31 32cond.true: 33 %0 = tail call i32 @llvm.cttz.i32(i32 %A, i1 true) 34 br label %cond.end 35 36cond.end: 37 %cond = phi i32 [ %0, %cond.true ], [ 32, %entry ] 38 ret i32 %cond 39} 40 41declare i32 @llvm.ctlz.i32(i32, i1) 42declare i32 @llvm.cttz.i32(i32, i1) 43 44