| ; RUN: opt -S -loop-fusion < %s | FileCheck %s |
| |
| @B = common global [1024 x i32] zeroinitializer, align 16 |
| |
| ; CHECK: void @dep_free_parametric |
| ; CHECK-next: entry: |
| ; CHECK: br i1 %{{.*}}, label %[[LOOP1PREHEADER:bb[0-9]*]], label %[[LOOP1SUCC:bb[0-9]+]] |
| ; CHECK: [[LOOP1PREHEADER]] |
| ; CHECK-NEXT: br label %[[LOOP1BODY:bb[0-9]*]] |
| ; CHECK: [[LOOP1BODY]] |
| ; CHECK: br i1 %{{.*}}, label %[[LOOP1BODY]], label %[[LOOP2EXIT:bb[0-9]+]] |
| ; CHECK: [[LOOP2EXIT]] |
| ; CHECK: br label %[[LOOP1SUCC]] |
| ; CHECK: [[LOOP1SUCC]] |
| ; CHECK: ret void |
| define void @dep_free_parametric(i32* noalias %A, i64 %N) { |
| entry: |
| %cmp4 = icmp slt i64 0, %N |
| br i1 %cmp4, label %bb3, label %bb14 |
| |
| bb3: ; preds = %entry |
| br label %bb5 |
| |
| bb5: ; preds = %bb3, %bb5 |
| %i.05 = phi i64 [ %inc, %bb5 ], [ 0, %bb3 ] |
| %sub = sub nsw i64 %i.05, 3 |
| %add = add nsw i64 %i.05, 3 |
| %mul = mul nsw i64 %sub, %add |
| %rem = srem i64 %mul, %i.05 |
| %conv = trunc i64 %rem to i32 |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %i.05 |
| store i32 %conv, i32* %arrayidx, align 4 |
| %inc = add nsw i64 %i.05, 1 |
| %cmp = icmp slt i64 %inc, %N |
| br i1 %cmp, label %bb5, label %bb10 |
| |
| bb10: ; preds = %bb5 |
| br label %bb14 |
| |
| bb14: ; preds = %bb10, %entry |
| %cmp31 = icmp slt i64 0, %N |
| br i1 %cmp31, label %bb8, label %bb12 |
| |
| bb8: ; preds = %bb14 |
| br label %bb9 |
| |
| bb9: ; preds = %bb8, %bb9 |
| %i1.02 = phi i64 [ %inc14, %bb9 ], [ 0, %bb8 ] |
| %sub7 = sub nsw i64 %i1.02, 3 |
| %add8 = add nsw i64 %i1.02, 3 |
| %mul9 = mul nsw i64 %sub7, %add8 |
| %rem10 = srem i64 %mul9, %i1.02 |
| %conv11 = trunc i64 %rem10 to i32 |
| %arrayidx12 = getelementptr inbounds [1024 x i32], [1024 x i32]* @B, i64 0, i64 %i1.02 |
| store i32 %conv11, i32* %arrayidx12, align 4 |
| %inc14 = add nsw i64 %i1.02, 1 |
| %cmp3 = icmp slt i64 %inc14, %N |
| br i1 %cmp3, label %bb9, label %bb15 |
| |
| bb15: ; preds = %bb9 |
| br label %bb12 |
| |
| bb12: ; preds = %bb15, %bb14 |
| ret void |
| } |
| |
| ; Test that `%add` is moved in for.first.preheader, and the two loops for.first |
| ; and for.second are fused. |
| |
| ; CHECK: void @moveinsts_preheader |
| ; CHECK-LABEL: for.first.guard: |
| ; CHECK: br i1 %cmp.guard, label %for.first.preheader, label %for.end |
| ; CHECK-LABEL: for.first.preheader: |
| ; CHECK-NEXT: %add = add nsw i32 %x, 1 |
| ; CHECK-NEXT: br label %for.first |
| ; CHECK-LABEL: for.first: |
| ; CHECK: br i1 %cmp.j, label %for.first, label %for.second.exit |
| ; CHECK-LABEL: for.second.exit: |
| ; CHECK-NEXT: br label %for.end |
| ; CHECK-LABEL: for.end: |
| ; CHECK-NEXT: ret void |
| define void @moveinsts_preheader(i32* noalias %A, i32* noalias %B, i64 %N, i32 %x) { |
| for.first.guard: |
| %cmp.guard = icmp slt i64 0, %N |
| br i1 %cmp.guard, label %for.first.preheader, label %for.second.guard |
| |
| for.first.preheader: |
| br label %for.first |
| |
| for.first: |
| %i = phi i64 [ %inc.i, %for.first ], [ 0, %for.first.preheader ] |
| %Ai = getelementptr inbounds i32, i32* %A, i64 %i |
| store i32 0, i32* %Ai, align 4 |
| %inc.i = add nsw i64 %i, 1 |
| %cmp.i = icmp slt i64 %inc.i, %N |
| br i1 %cmp.i, label %for.first, label %for.first.exit |
| |
| for.first.exit: |
| br label %for.second.guard |
| |
| for.second.guard: |
| br i1 %cmp.guard, label %for.second.preheader, label %for.end |
| |
| for.second.preheader: |
| %add = add nsw i32 %x, 1 |
| br label %for.second |
| |
| for.second: |
| %j = phi i64 [ %inc.j, %for.second ], [ 0, %for.second.preheader ] |
| %Bj = getelementptr inbounds i32, i32* %B, i64 %j |
| store i32 0, i32* %Bj, align 4 |
| %inc.j = add nsw i64 %j, 1 |
| %cmp.j = icmp slt i64 %inc.j, %N |
| br i1 %cmp.j, label %for.second, label %for.second.exit |
| |
| for.second.exit: |
| br label %for.end |
| |
| for.end: |
| ret void |
| } |
| |
| ; Test that `%add` is moved in for.second.exit, and the two loops for.first |
| ; and for.second are fused. |
| |
| ; CHECK: void @moveinsts_exitblock |
| ; CHECK-LABEL: for.first.guard: |
| ; CHECK: br i1 %cmp.guard, label %for.first.preheader, label %for.end |
| ; CHECK-LABEL: for.first.preheader: |
| ; CHECK-NEXT: br label %for.first |
| ; CHECK-LABEL: for.first: |
| ; CHECK: br i1 %cmp.j, label %for.first, label %for.second.exit |
| ; CHECK-LABEL: for.second.exit: |
| ; CHECK-NEXT: %add = add nsw i32 %x, 1 |
| ; CHECK-NEXT: br label %for.end |
| ; CHECK-LABEL: for.end: |
| ; CHECK-NEXT: ret void |
| define void @moveinsts_exitblock(i32* noalias %A, i32* noalias %B, i64 %N, i32 %x) { |
| for.first.guard: |
| %cmp.guard = icmp slt i64 0, %N |
| br i1 %cmp.guard, label %for.first.preheader, label %for.second.guard |
| |
| for.first.preheader: |
| br label %for.first |
| |
| for.first: |
| %i.04 = phi i64 [ %inc, %for.first ], [ 0, %for.first.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %i.04 |
| store i32 0, i32* %arrayidx, align 4 |
| %inc = add nsw i64 %i.04, 1 |
| %cmp = icmp slt i64 %inc, %N |
| br i1 %cmp, label %for.first, label %for.first.exit |
| |
| for.first.exit: |
| %add = add nsw i32 %x, 1 |
| br label %for.second.guard |
| |
| for.second.guard: |
| br i1 %cmp.guard, label %for.second.preheader, label %for.end |
| |
| for.second.preheader: |
| br label %for.second |
| |
| for.second: |
| %j.02 = phi i64 [ %inc6, %for.second ], [ 0, %for.second.preheader ] |
| %arrayidx4 = getelementptr inbounds i32, i32* %B, i64 %j.02 |
| store i32 0, i32* %arrayidx4, align 4 |
| %inc6 = add nsw i64 %j.02, 1 |
| %cmp.j = icmp slt i64 %inc6, %N |
| br i1 %cmp.j, label %for.second, label %for.second.exit |
| |
| for.second.exit: |
| br label %for.end |
| |
| for.end: |
| ret void |
| } |
| |
| ; Test that `%add` is moved in for.first.guard, and the two loops for.first |
| ; and for.second are fused. |
| |
| ; CHECK: void @moveinsts_guardblock |
| ; CHECK-LABEL: for.first.guard: |
| ; CHECK-NEXT: %cmp.guard = icmp slt i64 0, %N |
| ; CHECK-NEXT: %add = add nsw i32 %x, 1 |
| ; CHECK: br i1 %cmp.guard, label %for.first.preheader, label %for.end |
| ; CHECK-LABEL: for.first.preheader: |
| ; CHECK-NEXT: br label %for.first |
| ; CHECK-LABEL: for.first: |
| ; CHECK: br i1 %cmp.j, label %for.first, label %for.second.exit |
| ; CHECK-LABEL: for.second.exit: |
| ; CHECK-NEXT: br label %for.end |
| ; CHECK-LABEL: for.end: |
| ; CHECK-NEXT: ret void |
| define void @moveinsts_guardblock(i32* noalias %A, i32* noalias %B, i64 %N, i32 %x) { |
| for.first.guard: |
| %cmp.guard = icmp slt i64 0, %N |
| br i1 %cmp.guard, label %for.first.preheader, label %for.second.guard |
| |
| for.first.preheader: |
| br label %for.first |
| |
| for.first: |
| %i.04 = phi i64 [ %inc, %for.first ], [ 0, %for.first.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %i.04 |
| store i32 0, i32* %arrayidx, align 4 |
| %inc = add nsw i64 %i.04, 1 |
| %cmp = icmp slt i64 %inc, %N |
| br i1 %cmp, label %for.first, label %for.first.exit |
| |
| for.first.exit: |
| br label %for.second.guard |
| |
| for.second.guard: |
| %add = add nsw i32 %x, 1 |
| br i1 %cmp.guard, label %for.second.preheader, label %for.end |
| |
| for.second.preheader: |
| br label %for.second |
| |
| for.second: |
| %j.02 = phi i64 [ %inc6, %for.second ], [ 0, %for.second.preheader ] |
| %arrayidx4 = getelementptr inbounds i32, i32* %B, i64 %j.02 |
| store i32 0, i32* %arrayidx4, align 4 |
| %inc6 = add nsw i64 %j.02, 1 |
| %cmp.j = icmp slt i64 %inc6, %N |
| br i1 %cmp.j, label %for.second, label %for.second.exit |
| |
| for.second.exit: |
| br label %for.end |
| |
| for.end: |
| ret void |
| } |
| |
| ; Test that the incoming block of `%j.lcssa` is updated correctly |
| ; from for.second.guard to for.first.guard, and the two loops for.first and |
| ; for.second are fused. |
| |
| ; CHECK: i64 @updatephi_guardnonloopblock |
| ; CHECK-LABEL: for.first.guard: |
| ; CHECK-NEXT: %cmp.guard = icmp slt i64 0, %N |
| ; CHECK: br i1 %cmp.guard, label %for.first.preheader, label %for.end |
| ; CHECK-LABEL: for.first.preheader: |
| ; CHECK-NEXT: br label %for.first |
| ; CHECK-LABEL: for.first: |
| ; CHECK: br i1 %cmp.j, label %for.first, label %for.second.exit |
| ; CHECK-LABEL: for.second.exit: |
| ; CHECK-NEXT: br label %for.end |
| ; CHECK-LABEL: for.end: |
| ; CHECK-NEXT: %j.lcssa = phi i64 [ 0, %for.first.guard ], [ %j.02, %for.second.exit ] |
| ; CHECK-NEXT: ret i64 %j.lcssa |
| |
| define i64 @updatephi_guardnonloopblock(i32* noalias %A, i32* noalias %B, i64 %N, i32 %x) { |
| for.first.guard: |
| %cmp.guard = icmp slt i64 0, %N |
| br i1 %cmp.guard, label %for.first.preheader, label %for.second.guard |
| |
| for.first.preheader: |
| br label %for.first |
| |
| for.first: |
| %i.04 = phi i64 [ %inc, %for.first ], [ 0, %for.first.preheader ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %i.04 |
| store i32 0, i32* %arrayidx, align 4 |
| %inc = add nsw i64 %i.04, 1 |
| %cmp = icmp slt i64 %inc, %N |
| br i1 %cmp, label %for.first, label %for.first.exit |
| |
| for.first.exit: |
| br label %for.second.guard |
| |
| for.second.guard: |
| br i1 %cmp.guard, label %for.second.preheader, label %for.end |
| |
| for.second.preheader: |
| br label %for.second |
| |
| for.second: |
| %j.02 = phi i64 [ %inc6, %for.second ], [ 0, %for.second.preheader ] |
| %arrayidx4 = getelementptr inbounds i32, i32* %B, i64 %j.02 |
| store i32 0, i32* %arrayidx4, align 4 |
| %inc6 = add nsw i64 %j.02, 1 |
| %cmp.j = icmp slt i64 %inc6, %N |
| br i1 %cmp.j, label %for.second, label %for.second.exit |
| |
| for.second.exit: |
| br label %for.end |
| |
| for.end: |
| %j.lcssa = phi i64 [ 0, %for.second.guard ], [ %j.02, %for.second.exit ] |
| ret i64 %j.lcssa |
| } |