| ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=8 -S | FileCheck %s |
| |
| ; int int_inc; |
| ; |
| ;int induction_with_global(int init, int *restrict A, int N) { |
| ; int x = init; |
| ; for (int i=0;i<N;i++){ |
| ; A[i] = x; |
| ; x += int_inc; |
| ; } |
| ; return x; |
| ;} |
| |
| ; CHECK-LABEL: @induction_with_global( |
| ; CHECK: %[[INT_INC:.*]] = load i32, i32* @int_inc, align 4 |
| ; CHECK: vector.body: |
| ; CHECK: %[[VAR1:.*]] = insertelement <8 x i32> undef, i32 %[[INT_INC]], i32 0 |
| ; CHECK: %[[VAR2:.*]] = shufflevector <8 x i32> %[[VAR1]], <8 x i32> undef, <8 x i32> zeroinitializer |
| ; CHECK: mul <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>, %[[VAR2]] |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| |
| |
| @int_inc = common global i32 0, align 4 |
| |
| define i32 @induction_with_global(i32 %init, i32* noalias nocapture %A, i32 %N) { |
| entry: |
| %cmp4 = icmp sgt i32 %N, 0 |
| br i1 %cmp4, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: ; preds = %entry |
| %0 = load i32, i32* @int_inc, align 4 |
| %1 = mul i32 %0, %N |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %for.body.lr.ph |
| %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] |
| %x.05 = phi i32 [ %init, %for.body.lr.ph ], [ %add, %for.body ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv |
| store i32 %x.05, i32* %arrayidx, align 4 |
| %add = add nsw i32 %0, %x.05 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i32 |
| %exitcond = icmp eq i32 %lftr.wideiv, %N |
| br i1 %exitcond, label %for.end.loopexit, label %for.body |
| |
| for.end.loopexit: ; preds = %for.body |
| %2 = add i32 %1, %init |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| %x.0.lcssa = phi i32 [ %init, %entry ], [ %2, %for.end.loopexit ] |
| ret i32 %x.0.lcssa |
| } |
| |
| |
| ;int induction_with_loop_inv(int init, int *restrict A, int N, int M) { |
| ; int x = init; |
| ; for (int j = 0; j < M; j++) { |
| ; for (int i=0; i<N; i++){ |
| ; A[i] = x; |
| ; x += j; // induction step is a loop invariant variable |
| ; } |
| ; } |
| ; return x; |
| ;} |
| |
| ; CHECK-LABEL: @induction_with_loop_inv( |
| ; CHECK: for.cond1.preheader: |
| ; CHECK: %[[INDVAR0:.*]] = phi i32 [ 0, |
| ; CHECK: %[[INDVAR1:.*]] = phi i32 [ 0, |
| ; CHECK: vector.body: |
| ; CHECK: %[[VAR1:.*]] = insertelement <8 x i32> undef, i32 %[[INDVAR1]], i32 0 |
| ; CHECK: %[[VAR2:.*]] = shufflevector <8 x i32> %[[VAR1]], <8 x i32> undef, <8 x i32> zeroinitializer |
| ; CHECK: mul <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>, %[[VAR2]] |
| |
| define i32 @induction_with_loop_inv(i32 %init, i32* noalias nocapture %A, i32 %N, i32 %M) { |
| entry: |
| %cmp10 = icmp sgt i32 %M, 0 |
| br i1 %cmp10, label %for.cond1.preheader.lr.ph, label %for.end6 |
| |
| for.cond1.preheader.lr.ph: ; preds = %entry |
| %cmp27 = icmp sgt i32 %N, 0 |
| br label %for.cond1.preheader |
| |
| for.cond1.preheader: ; preds = %for.inc4, %for.cond1.preheader.lr.ph |
| %indvars.iv15 = phi i32 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next16, %for.inc4 ] |
| %j.012 = phi i32 [ 0, %for.cond1.preheader.lr.ph ], [ %inc5, %for.inc4 ] |
| %x.011 = phi i32 [ %init, %for.cond1.preheader.lr.ph ], [ %x.1.lcssa, %for.inc4 ] |
| br i1 %cmp27, label %for.body3.preheader, label %for.inc4 |
| |
| for.body3.preheader: ; preds = %for.cond1.preheader |
| br label %for.body3 |
| |
| for.body3: ; preds = %for.body3.preheader, %for.body3 |
| %indvars.iv = phi i64 [ %indvars.iv.next, %for.body3 ], [ 0, %for.body3.preheader ] |
| %x.18 = phi i32 [ %add, %for.body3 ], [ %x.011, %for.body3.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv |
| store i32 %x.18, i32* %arrayidx, align 4 |
| %add = add nsw i32 %x.18, %j.012 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i32 |
| %exitcond = icmp eq i32 %lftr.wideiv, %N |
| br i1 %exitcond, label %for.inc4.loopexit, label %for.body3 |
| |
| for.inc4.loopexit: ; preds = %for.body3 |
| %0 = add i32 %x.011, %indvars.iv15 |
| br label %for.inc4 |
| |
| for.inc4: ; preds = %for.inc4.loopexit, %for.cond1.preheader |
| %x.1.lcssa = phi i32 [ %x.011, %for.cond1.preheader ], [ %0, %for.inc4.loopexit ] |
| %inc5 = add nuw nsw i32 %j.012, 1 |
| %indvars.iv.next16 = add i32 %indvars.iv15, %N |
| %exitcond17 = icmp eq i32 %inc5, %M |
| br i1 %exitcond17, label %for.end6.loopexit, label %for.cond1.preheader |
| |
| for.end6.loopexit: ; preds = %for.inc4 |
| %x.1.lcssa.lcssa = phi i32 [ %x.1.lcssa, %for.inc4 ] |
| br label %for.end6 |
| |
| for.end6: ; preds = %for.end6.loopexit, %entry |
| %x.0.lcssa = phi i32 [ %init, %entry ], [ %x.1.lcssa.lcssa, %for.end6.loopexit ] |
| ret i32 %x.0.lcssa |
| } |