1 ; REQUIRES: asserts 2 ; RUN: opt < %s -loop-unswitch -disable-output -stats 2>&1| FileCheck %s 3 4 ; Check the select statement in the loop will be unswitched. 5 ; CHECK: 1 loop-unswitch - Number of selects unswitched 6 define i32 @test(i1 zeroext %x, i32 %a) local_unnamed_addr #0 { 7 entry: 8 br label %while.cond 9 10 while.cond: ; preds = %while.body, %entry 11 %i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ] 12 %s.0 = phi i32 [ %a, %entry ], [ %add, %while.body ] 13 %cmp = icmp slt i32 %i.0, 10000 14 br i1 %cmp, label %while.body, label %while.end 15 16 while.body: ; preds = %while.cond 17 %cond = select i1 %x, i32 %a, i32 %i.0 18 %add = add nsw i32 %s.0, %cond 19 %inc = add nsw i32 %i.0, 1 20 br label %while.cond 21 22 while.end: ; preds = %while.cond 23 %s.0.lcssa = phi i32 [ %s.0, %while.cond ] 24 ret i32 %s.0.lcssa 25 } 26 27
