| ; RUN: opt -loop-reduce -S < %s | FileCheck %s |
| ; We find it is very bad to allow LSR formula containing SCEVAddRecExpr Reg |
| ; from siblings of current loop. When one loop is LSR optimized, it can |
| ; insert lsr.iv for other sibling loops, which sometimes leads to many extra |
| ; lsr.iv inserted for loops. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| @cond = common local_unnamed_addr global i64 0, align 8 |
| |
| ; Check there is no extra lsr.iv generated in foo. |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NOT: lsr.iv{{[0-9]+}} = |
| ; |
| define void @foo(i64 %N) local_unnamed_addr { |
| entry: |
| br label %do.body |
| |
| do.body: ; preds = %do.body, %entry |
| %i.0 = phi i64 [ 0, %entry ], [ %inc, %do.body ] |
| tail call void @goo(i64 %i.0, i64 %i.0) |
| %inc = add nuw nsw i64 %i.0, 1 |
| %t0 = load i64, i64* @cond, align 8 |
| %tobool = icmp eq i64 %t0, 0 |
| br i1 %tobool, label %do.body2.preheader, label %do.body |
| |
| do.body2.preheader: ; preds = %do.body |
| br label %do.body2 |
| |
| do.body2: ; preds = %do.body2.preheader, %do.body2 |
| %i.1 = phi i64 [ %inc3, %do.body2 ], [ 0, %do.body2.preheader ] |
| %j.1 = phi i64 [ %inc4, %do.body2 ], [ %inc, %do.body2.preheader ] |
| tail call void @goo(i64 %i.1, i64 %j.1) |
| %inc3 = add nuw nsw i64 %i.1, 1 |
| %inc4 = add nsw i64 %j.1, 1 |
| %t1 = load i64, i64* @cond, align 8 |
| %tobool6 = icmp eq i64 %t1, 0 |
| br i1 %tobool6, label %do.body8.preheader, label %do.body2 |
| |
| do.body8.preheader: ; preds = %do.body2 |
| br label %do.body8 |
| |
| do.body8: ; preds = %do.body8.preheader, %do.body8 |
| %i.2 = phi i64 [ %inc9, %do.body8 ], [ 0, %do.body8.preheader ] |
| %j.2 = phi i64 [ %inc10, %do.body8 ], [ %inc4, %do.body8.preheader ] |
| tail call void @goo(i64 %i.2, i64 %j.2) |
| %inc9 = add nuw nsw i64 %i.2, 1 |
| %inc10 = add nsw i64 %j.2, 1 |
| %t2 = load i64, i64* @cond, align 8 |
| %tobool12 = icmp eq i64 %t2, 0 |
| br i1 %tobool12, label %do.body14.preheader, label %do.body8 |
| |
| do.body14.preheader: ; preds = %do.body8 |
| br label %do.body14 |
| |
| do.body14: ; preds = %do.body14.preheader, %do.body14 |
| %i.3 = phi i64 [ %inc15, %do.body14 ], [ 0, %do.body14.preheader ] |
| %j.3 = phi i64 [ %inc16, %do.body14 ], [ %inc10, %do.body14.preheader ] |
| tail call void @goo(i64 %i.3, i64 %j.3) |
| %inc15 = add nuw nsw i64 %i.3, 1 |
| %inc16 = add nsw i64 %j.3, 1 |
| %t3 = load i64, i64* @cond, align 8 |
| %tobool18 = icmp eq i64 %t3, 0 |
| br i1 %tobool18, label %do.body20.preheader, label %do.body14 |
| |
| do.body20.preheader: ; preds = %do.body14 |
| br label %do.body20 |
| |
| do.body20: ; preds = %do.body20.preheader, %do.body20 |
| %i.4 = phi i64 [ %inc21, %do.body20 ], [ 0, %do.body20.preheader ] |
| %j.4 = phi i64 [ %inc22, %do.body20 ], [ %inc16, %do.body20.preheader ] |
| tail call void @goo(i64 %i.4, i64 %j.4) |
| %inc21 = add nuw nsw i64 %i.4, 1 |
| %inc22 = add nsw i64 %j.4, 1 |
| %t4 = load i64, i64* @cond, align 8 |
| %tobool24 = icmp eq i64 %t4, 0 |
| br i1 %tobool24, label %do.body26.preheader, label %do.body20 |
| |
| do.body26.preheader: ; preds = %do.body20 |
| br label %do.body26 |
| |
| do.body26: ; preds = %do.body26.preheader, %do.body26 |
| %i.5 = phi i64 [ %inc27, %do.body26 ], [ 0, %do.body26.preheader ] |
| %j.5 = phi i64 [ %inc28, %do.body26 ], [ %inc22, %do.body26.preheader ] |
| tail call void @goo(i64 %i.5, i64 %j.5) |
| %inc27 = add nuw nsw i64 %i.5, 1 |
| %inc28 = add nsw i64 %j.5, 1 |
| %t5 = load i64, i64* @cond, align 8 |
| %tobool30 = icmp eq i64 %t5, 0 |
| br i1 %tobool30, label %do.end31, label %do.body26 |
| |
| do.end31: ; preds = %do.body26 |
| ret void |
| } |
| |
| declare void @goo(i64, i64) local_unnamed_addr |
| |
