| ; RUN: opt -mtriple=x86_64-unknown-linux-gnu -loop-reduce -lsr-insns-cost=false -S < %s | FileCheck %s |
| ; Check LSR formula canonicalization will put loop invariant regs before |
| ; induction variable of current loop, so exprs involving loop invariant regs |
| ; can be promoted outside of current loop. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| define void @foo(i32 %size, i32 %nsteps, i8* nocapture %maxarray, i8* nocapture readnone %buffer, i32 %init) local_unnamed_addr #0 { |
| entry: |
| %cmp25 = icmp sgt i32 %nsteps, 0 |
| br i1 %cmp25, label %for.cond1.preheader.lr.ph, label %for.end12 |
| |
| for.cond1.preheader.lr.ph: ; preds = %entry |
| %cmp223 = icmp sgt i32 %size, 1 |
| %t0 = sext i32 %init to i64 |
| %wide.trip.count = zext i32 %size to i64 |
| %wide.trip.count31 = zext i32 %nsteps to i64 |
| br label %for.cond1.preheader |
| |
| for.cond1.preheader: ; preds = %for.inc10, %for.cond1.preheader.lr.ph |
| %indvars.iv28 = phi i64 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next29, %for.inc10 ] |
| br i1 %cmp223, label %for.body3.lr.ph, label %for.inc10 |
| |
| for.body3.lr.ph: ; preds = %for.cond1.preheader |
| %t1 = add nsw i64 %indvars.iv28, %t0 |
| %t2 = trunc i64 %indvars.iv28 to i8 |
| br label %for.body3 |
| |
| ; Make sure loop invariant items are grouped together so that load address can |
| ; be represented in one getelementptr. |
| ; CHECK-LABEL: for.body3: |
| ; CHECK-NEXT: [[LSR:%[^,]+]] = phi i64 [ 1, %for.body3.lr.ph ], [ {{.*}}, %for.body3 ] |
| ; CHECK-NOT: = phi i64 |
| ; CHECK-NEXT: [[LOADADDR:%[^,]+]] = getelementptr i8, i8* {{.*}}, i64 [[LSR]] |
| ; CHECK-NEXT: = load i8, i8* [[LOADADDR]], align 1 |
| ; CHECK: br i1 %exitcond, label %for.inc10.loopexit, label %for.body3 |
| |
| for.body3: ; preds = %for.body3, %for.body3.lr.ph |
| %indvars.iv = phi i64 [ 1, %for.body3.lr.ph ], [ %indvars.iv.next, %for.body3 ] |
| %t5 = trunc i64 %indvars.iv to i8 |
| %t3 = add nsw i64 %t1, %indvars.iv |
| %arrayidx = getelementptr inbounds i8, i8* %maxarray, i64 %t3 |
| %t4 = load i8, i8* %arrayidx, align 1 |
| %add5 = add i8 %t4, %t5 |
| %add6 = add i8 %add5, %t2 |
| %arrayidx9 = getelementptr inbounds i8, i8* %maxarray, i64 %indvars.iv |
| store i8 %add6, i8* %arrayidx9, align 1 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count |
| br i1 %exitcond, label %for.inc10.loopexit, label %for.body3 |
| |
| for.inc10.loopexit: ; preds = %for.body3 |
| br label %for.inc10 |
| |
| for.inc10: ; preds = %for.inc10.loopexit, %for.cond1.preheader |
| %indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1 |
| %exitcond32 = icmp eq i64 %indvars.iv.next29, %wide.trip.count31 |
| br i1 %exitcond32, label %for.end12.loopexit, label %for.cond1.preheader |
| |
| for.end12.loopexit: ; preds = %for.inc10 |
| br label %for.end12 |
| |
| for.end12: ; preds = %for.end12.loopexit, %entry |
| ret void |
| } |
