| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -bonus-inst-threshold=10 | FileCheck %s |
| |
| declare void @sideeffect0() |
| declare void @sideeffect1() |
| declare void @sideeffect2() |
| declare void @use8(i8) |
| declare i1 @gen1() |
| |
| ; Basic cases, blocks have nothing other than the comparison itself. |
| |
| define void @one_pred(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND1:%.*]] = or i1 [[C1]], [[C3_OLD]] |
| ; CHECK-NEXT: br i1 [[OR_COND1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %c3 = icmp eq i8 %v3, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| ; More complex case, there's an extra op that is safe to execute unconditionally. |
| |
| define void @one_pred_with_extra_op(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %c1 = icmp eq i8 %v1_adj, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2:%.*]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3_ADJ_OLD]], 0 |
| ; CHECK-NEXT: [[OR_COND1:%.*]] = or i1 [[C1]], [[C3_OLD]] |
| ; CHECK-NEXT: br i1 [[OR_COND1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %c3 = icmp eq i8 %v3_adj, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| ; More complex case, there's an extra op that is safe to execute unconditionally, and it has multiple uses. |
| |
| define void @one_pred_with_extra_op_multiuse(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_multiuse( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[V1_ADJ_ADJ:%.*]] = add i8 [[V1_ADJ]], [[V1_ADJ]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %v1_adj_adj = add i8 %v1_adj, %v1_adj |
| %c1 = icmp eq i8 %v1_adj_adj, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op_multiuse(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_multiuse( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2:%.*]] |
| ; CHECK-NEXT: [[V3_ADJ_ADJ_OLD:%.*]] = add i8 [[V3_ADJ_OLD]], [[V3_ADJ_OLD]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3_ADJ_ADJ_OLD]], 0 |
| ; CHECK-NEXT: [[OR_COND1:%.*]] = or i1 [[C1]], [[C3_OLD]] |
| ; CHECK-NEXT: br i1 [[OR_COND1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[V3_ADJ_ADJ:%.*]] = add i8 [[V3_ADJ]], [[V3_ADJ]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3_ADJ_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %v3_adj_adj = add i8 %v3_adj, %v3_adj |
| %c3 = icmp eq i8 %v3_adj_adj, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| ; More complex case, there's an op that is safe to execute unconditionally, |
| ; and said op is live-out. |
| |
| define void @one_pred_with_extra_op_liveout(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_liveout( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %c1 = icmp eq i8 %v1_adj, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v1_adj) |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| define void @one_pred_with_extra_op_liveout_multiuse(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_liveout_multiuse( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %c1 = icmp eq i8 %v1_adj, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v1_adj) |
| call void @use8(i8 %v1_adj) |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @one_pred_with_extra_op_liveout_distant_phi(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_liveout_distant_phi( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED:%.*]], label [[LEFT_END:%.*]] |
| ; CHECK: pred: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[V2_ADJ:%.*]] = add i8 [[V0]], [[V1]] |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C1]], [[C2]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V2_ADJ]]) |
| ; CHECK-NEXT: br label [[LEFT_END]] |
| ; CHECK: left_end: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V2_ADJ]], [[FINAL_LEFT]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect2() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred, label %left_end |
| pred: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %dispatch, label %final_right |
| dispatch: |
| %v2_adj = add i8 %v0, %v1 |
| %c2 = icmp eq i8 %v2_adj, 0 |
| br i1 %c2, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v2_adj) |
| br label %left_end |
| left_end: |
| %merge_left = phi i8 [ %v2_adj, %final_left ], [ 0, %entry ] |
| call void @sideeffect1() |
| call void @use8(i8 %merge_left) |
| ret void |
| final_right: |
| call void @sideeffect2() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op_liveout(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_liveout( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[DISPATCH:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3_ADJ_OLD]], 0 |
| ; CHECK-NEXT: br i1 [[C3_OLD]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 0, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %c3 = icmp eq i8 %v3_adj, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| %merge_left = phi i8 [ %v3_adj, %dispatch ], [ 0, %pred0 ] |
| call void @use8(i8 %merge_left) |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op_liveout_multiuse(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_liveout_multiuse( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[DISPATCH:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3_ADJ]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3_ADJ_OLD]], 0 |
| ; CHECK-NEXT: br i1 [[C3_OLD]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 0, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: [[MERGE_LEFT_2:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 42, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT_2]]) |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %c3 = icmp eq i8 %v3_adj, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| %merge_left = phi i8 [ %v3_adj, %dispatch ], [ 0, %pred0 ] |
| %merge_left_2 = phi i8 [ %v3_adj, %dispatch ], [ 42, %pred0 ] |
| call void @use8(i8 %merge_left) |
| call void @use8(i8 %merge_left_2) |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| ; More complex case, there's an op that is safe to execute unconditionally, |
| ; and said op is live-out, and it is only used externally. |
| |
| define void @one_pred_with_extra_op_eexternally_used_only(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_eexternally_used_only( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v1_adj) |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| define void @one_pred_with_extra_op_externally_used_only_multiuse(i8 %v0, i8 %v1) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_externally_used_only_multiuse( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C0]], [[C1]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| pred: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %dispatch, label %final_right |
| dispatch: |
| %v1_adj = add i8 %v0, %v1 |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v1_adj) |
| call void @use8(i8 %v1_adj) |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op_externally_used_only(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_externally_used_only( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[DISPATCH:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3]], 0 |
| ; CHECK-NEXT: br i1 [[C3_OLD]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 0, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %c3 = icmp eq i8 %v3, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| %merge_left = phi i8 [ %v3_adj, %dispatch ], [ 0, %pred0 ] |
| call void @use8(i8 %merge_left) |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @two_preds_with_extra_op_externally_used_only_multiuse(i8 %v0, i8 %v1, i8 %v2, i8 %v3) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_externally_used_only_multiuse( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[DISPATCH:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V1]], [[V2]] |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3]], 0 |
| ; CHECK-NEXT: br i1 [[C3_OLD]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 0, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: [[MERGE_LEFT_2:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 42, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT_2]]) |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %v3_adj = add i8 %v1, %v2 |
| %c3 = icmp eq i8 %v3, 0 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| %merge_left = phi i8 [ %v3_adj, %dispatch ], [ 0, %pred0 ] |
| %merge_left_2 = phi i8 [ %v3_adj, %dispatch ], [ 42, %pred0 ] |
| call void @use8(i8 %merge_left) |
| call void @use8(i8 %merge_left_2) |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| ; The liveout instruction can be located after the branch condition. |
| define void @one_pred_with_extra_op_externally_used_only_after_cond_distant_phi(i8 %v0, i8 %v1, i8 %v3, i8 %v4, i8 %v5) { |
| ; CHECK-LABEL: @one_pred_with_extra_op_externally_used_only_after_cond_distant_phi( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED:%.*]], label [[LEFT_END:%.*]] |
| ; CHECK: pred: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[V2_ADJ:%.*]] = add i8 [[V4:%.*]], [[V5:%.*]] |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C1]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V2_ADJ]]) |
| ; CHECK-NEXT: br label [[LEFT_END]] |
| ; CHECK: left_end: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V2_ADJ]], [[FINAL_LEFT]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect2() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred, label %left_end |
| pred: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %dispatch, label %final_right |
| dispatch: |
| %c3 = icmp eq i8 %v3, 0 |
| %v2_adj = add i8 %v4, %v5 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| call void @sideeffect0() |
| call void @use8(i8 %v2_adj) |
| br label %left_end |
| left_end: |
| %merge_left = phi i8 [ %v2_adj, %final_left ], [ 0, %entry ] |
| call void @sideeffect1() |
| call void @use8(i8 %merge_left) |
| ret void |
| final_right: |
| call void @sideeffect2() |
| ret void |
| } |
| define void @two_preds_with_extra_op_externally_used_only_after_cond(i8 %v0, i8 %v1, i8 %v2, i8 %v3, i8 %v4, i8 %v5) { |
| ; CHECK-LABEL: @two_preds_with_extra_op_externally_used_only_after_cond( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[V0:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C0]], label [[PRED0:%.*]], label [[PRED1:%.*]] |
| ; CHECK: pred0: |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[DISPATCH:%.*]] |
| ; CHECK: pred1: |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2:%.*]], 0 |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[V3_ADJ:%.*]] = add i8 [[V4:%.*]], [[V5:%.*]] |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[C2]], [[C3]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[C3_OLD:%.*]] = icmp eq i8 [[V3]], 0 |
| ; CHECK-NEXT: [[V3_ADJ_OLD:%.*]] = add i8 [[V4]], [[V5]] |
| ; CHECK-NEXT: br i1 [[C3_OLD]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: final_left: |
| ; CHECK-NEXT: [[MERGE_LEFT:%.*]] = phi i8 [ [[V3_ADJ_OLD]], [[DISPATCH]] ], [ 0, [[PRED0]] ], [ [[V3_ADJ]], [[PRED1]] ] |
| ; CHECK-NEXT: call void @use8(i8 [[MERGE_LEFT]]) |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| %c0 = icmp eq i8 %v0, 0 |
| br i1 %c0, label %pred0, label %pred1 |
| pred0: |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %dispatch |
| pred1: |
| %c2 = icmp eq i8 %v2, 0 |
| br i1 %c2, label %dispatch, label %final_right |
| dispatch: |
| %c3 = icmp eq i8 %v3, 0 |
| %v3_adj = add i8 %v4, %v5 |
| br i1 %c3, label %final_left, label %final_right |
| final_left: |
| %merge_left = phi i8 [ %v3_adj, %dispatch ], [ 0, %pred0 ] |
| call void @use8(i8 %merge_left) |
| call void @sideeffect0() |
| ret void |
| final_right: |
| call void @sideeffect1() |
| ret void |
| } |
| |
| define void @pr48450() { |
| ; CHECK-LABEL: @pr48450( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[COUNTDOWN:%.*]] = phi i8 [ 8, [[ENTRY:%.*]] ], [ [[DEC_MERGE:%.*]], [[FOR_BODYTHREAD_PRE_SPLIT:%.*]] ] |
| ; CHECK-NEXT: [[C:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: br i1 [[C]], label [[FOR_INC:%.*]], label [[IF_THEN:%.*]] |
| ; CHECK: for.inc: |
| ; CHECK-NEXT: [[DEC_OLD:%.*]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT_OLD:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_NOT_OLD]], label [[IF_END_LOOPEXIT:%.*]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[C2:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: [[C2_NOT:%.*]] = xor i1 [[C2]], true |
| ; CHECK-NEXT: [[DEC:%.*]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = or i1 [[C2_NOT]], [[CMP_NOT]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[IF_END_LOOPEXIT]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: for.bodythread-pre-split: |
| ; CHECK-NEXT: [[DEC_MERGE]] = phi i8 [ [[DEC]], [[IF_THEN]] ], [ [[DEC_OLD]], [[FOR_INC]] ] |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[FOR_BODY]] |
| ; CHECK: if.end.loopexit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: |
| %countdown = phi i8 [ 8, %entry ], [ %dec, %for.bodythread-pre-split ] |
| %c = call i1 @gen1() |
| br i1 %c, label %for.inc, label %if.then |
| |
| for.inc: |
| %dec = add i8 %countdown, -1 |
| %cmp.not = icmp eq i8 %countdown, 0 |
| br i1 %cmp.not, label %if.end.loopexit, label %for.bodythread-pre-split |
| |
| if.then: |
| %c2 = call i1 @gen1() |
| br i1 %c2, label %for.inc, label %if.end.loopexit |
| |
| for.bodythread-pre-split: |
| call void @sideeffect0() |
| br label %for.body |
| |
| if.end.loopexit: |
| ret void |
| } |
| |
| define void @pr48450_2(i1 %enable_loopback) { |
| ; CHECK-LABEL: @pr48450_2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[COUNTDOWN:%.*]] = phi i8 [ 8, [[ENTRY:%.*]] ], [ [[DEC_MERGE:%.*]], [[FOR_BODYTHREAD_PRE_SPLIT:%.*]] ] |
| ; CHECK-NEXT: [[C:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: br i1 [[C]], label [[FOR_INC:%.*]], label [[IF_THEN:%.*]] |
| ; CHECK: for.inc: |
| ; CHECK-NEXT: [[DEC_OLD:%.*]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT_OLD:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_NOT_OLD]], label [[IF_END_LOOPEXIT:%.*]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[C2:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: [[C2_NOT:%.*]] = xor i1 [[C2]], true |
| ; CHECK-NEXT: [[DEC:%.*]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = or i1 [[C2_NOT]], [[CMP_NOT]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[IF_END_LOOPEXIT]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: for.bodythread-pre-split: |
| ; CHECK-NEXT: [[DEC_MERGE]] = phi i8 [ [[DEC_OLD]], [[FOR_INC]] ], [ [[DEC_MERGE]], [[FOR_BODYTHREAD_PRE_SPLIT_LOOPBACK:%.*]] ], [ [[DEC]], [[IF_THEN]] ] |
| ; CHECK-NEXT: [[SHOULD_LOOPBACK:%.*]] = phi i1 [ true, [[FOR_INC]] ], [ false, [[FOR_BODYTHREAD_PRE_SPLIT_LOOPBACK]] ], [ true, [[IF_THEN]] ] |
| ; CHECK-NEXT: [[DO_LOOPBACK:%.*]] = and i1 [[SHOULD_LOOPBACK]], [[ENABLE_LOOPBACK:%.*]] |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br i1 [[DO_LOOPBACK]], label [[FOR_BODYTHREAD_PRE_SPLIT_LOOPBACK]], label [[FOR_BODY]] |
| ; CHECK: for.bodythread-pre-split.loopback: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: if.end.loopexit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: |
| %countdown = phi i8 [ 8, %entry ], [ %dec, %for.bodythread-pre-split ] |
| %c = call i1 @gen1() |
| br i1 %c, label %for.inc, label %if.then |
| |
| for.inc: |
| %dec = add i8 %countdown, -1 |
| %cmp.not = icmp eq i8 %countdown, 0 |
| br i1 %cmp.not, label %if.end.loopexit, label %for.bodythread-pre-split |
| |
| if.then: |
| %c2 = call i1 @gen1() |
| br i1 %c2, label %for.inc, label %if.end.loopexit |
| |
| for.bodythread-pre-split: |
| %should_loopback = phi i1 [ 1, %for.inc ], [ 0, %for.bodythread-pre-split.loopback ] |
| %do_loopback = and i1 %should_loopback, %enable_loopback |
| call void @sideeffect0() |
| br i1 %do_loopback, label %for.bodythread-pre-split.loopback, label %for.body |
| |
| for.bodythread-pre-split.loopback: |
| call void @sideeffect0() |
| br label %for.bodythread-pre-split |
| |
| if.end.loopexit: |
| ret void |
| } |
| |
| @f.b = external global i8, align 1 |
| define void @pr48450_3() { |
| ; CHECK-LABEL: @pr48450_3( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_COND1:%.*]] |
| ; CHECK: for.cond1: |
| ; CHECK-NEXT: [[V:%.*]] = load i8, i8* @f.b, align 1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i8 [[V]], 1 |
| ; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]]) |
| ; CHECK-NEXT: br label [[FOR_COND1]] |
| ; |
| entry: |
| br label %for.cond1 |
| |
| for.cond1: |
| %v = load i8, i8* @f.b, align 1 |
| %cmp = icmp slt i8 %v, 1 |
| br i1 %cmp, label %for.body, label %for.end |
| |
| for.body: |
| br label %for.cond1 |
| |
| for.end: |
| %tobool = icmp ne i8 %v, 0 |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: |
| unreachable |
| |
| if.end: |
| br label %for.cond2 |
| |
| for.cond2: |
| %c.0 = phi i8 [ undef, %if.end ], [ %inc, %if.end7 ] |
| %cmp3 = icmp slt i8 %c.0, 1 |
| br i1 %cmp3, label %for.body4, label %for.cond.cleanup |
| |
| for.cond.cleanup: |
| br label %cleanup |
| |
| for.body4: |
| br i1 undef, label %if.then6, label %if.end7 |
| |
| if.then6: |
| br label %cleanup |
| |
| if.end7: |
| %inc = add nsw i8 %c.0, 1 |
| br label %for.cond2 |
| |
| cleanup: |
| unreachable |
| } |
