| ; REQUIRES: asserts |
| ; RUN: opt < %s -loop-unswitch -disable-output -stats 2>&1| FileCheck %s |
| ; RUN: opt < %s -loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output -stats 2>&1| FileCheck %s |
| |
| ; Check the select statement in the loop will be unswitched. |
| ; CHECK: 1 loop-unswitch - Number of selects unswitched |
| define i32 @test(i1 zeroext %x, i32 %a) local_unnamed_addr #0 { |
| entry: |
| br label %while.cond |
| |
| while.cond: ; preds = %while.body, %entry |
| %i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ] |
| %s.0 = phi i32 [ %a, %entry ], [ %add, %while.body ] |
| %cmp = icmp slt i32 %i.0, 10000 |
| br i1 %cmp, label %while.body, label %while.end |
| |
| while.body: ; preds = %while.cond |
| %cond = select i1 %x, i32 %a, i32 %i.0 |
| %add = add nsw i32 %s.0, %cond |
| %inc = add nsw i32 %i.0, 1 |
| br label %while.cond |
| |
| while.end: ; preds = %while.cond |
| %s.0.lcssa = phi i32 [ %s.0, %while.cond ] |
| ret i32 %s.0.lcssa |
| } |
| |