| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -passes=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() |
| declare i32 @speculate_call(ptr) #0 |
| |
| ; 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:%.*]] = select i1 [[C0]], i1 [[C1]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C1]], i1 true, i1 [[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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C0]], i1 [[C1]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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 |
| } |
| |
| ; When we fold the dispatch block into pred, the call is moved to pred |
| ; and the attribute nonnull propagates poison paramater. However, since the |
| ; function is speculatable, it can never cause UB. So, we need not technically drop it. |
| define void @one_pred_with_spec_call(i8 %v0, i8 %v1, ptr %p) { |
| ; CHECK-LABEL: @one_pred_with_spec_call( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp ne ptr [[P:%.*]], null |
| ; CHECK-NEXT: [[X:%.*]] = call i32 @speculate_call(ptr nonnull [[P]]) |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = select i1 [[C0]], i1 [[C1]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[COMMON_RET:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| pred: |
| %c0 = icmp ne ptr %p, null |
| br i1 %c0, label %dispatch, label %final_right |
| |
| dispatch: |
| %x = call i32 @speculate_call(ptr nonnull %p) |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %final_right |
| |
| final_left: |
| ret void |
| |
| final_right: |
| call void @sideeffect0() |
| ret void |
| } |
| |
| ; Drop dereferenceable on the parameter |
| define void @one_pred_with_spec_call_deref(i8 %v0, i8 %v1, ptr %p) { |
| ; CHECK-LABEL: @one_pred_with_spec_call_deref( |
| ; CHECK-NEXT: pred: |
| ; CHECK-NEXT: [[C0:%.*]] = icmp ne ptr [[P:%.*]], null |
| ; CHECK-NEXT: [[X:%.*]] = call i32 @speculate_call(ptr [[P]]) |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1:%.*]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = select i1 [[C0]], i1 [[C1]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[COMMON_RET:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| pred: |
| %c0 = icmp ne ptr %p, null |
| br i1 %c0, label %dispatch, label %final_right |
| |
| dispatch: |
| %x = call i32 @speculate_call(ptr dereferenceable(12) %p) |
| %c1 = icmp eq i8 %v1, 0 |
| br i1 %c1, label %final_left, label %final_right |
| |
| final_left: |
| ret void |
| |
| final_right: |
| call void @sideeffect0() |
| 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:%.*]] = select i1 [[C1]], i1 true, i1 [[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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C0]], i1 [[C1]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C1]], i1 true, i1 [[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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FINAL_LEFT]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C0]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C0]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1_ADJ]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C1]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V2_ADJ:%.*]] = add i8 [[V0]], [[V1]] |
| ; CHECK-NEXT: [[C2:%.*]] = icmp eq i8 [[V2_ADJ]], 0 |
| ; CHECK-NEXT: br i1 [[C2]], 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect2() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C0]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; CHECK: final_left: |
| ; CHECK-NEXT: call void @sideeffect0() |
| ; CHECK-NEXT: call void @use8(i8 [[V1_ADJ]]) |
| ; CHECK-NEXT: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C0]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[V1_ADJ:%.*]] = add i8 [[V0]], [[V1:%.*]] |
| ; CHECK-NEXT: [[C1:%.*]] = icmp eq i8 [[V1]], 0 |
| ; CHECK-NEXT: br i1 [[C1]], label [[FINAL_LEFT:%.*]], label [[FINAL_RIGHT]] |
| ; CHECK: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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: br i1 [[C1]], label [[DISPATCH:%.*]], label [[FINAL_RIGHT:%.*]] |
| ; CHECK: dispatch: |
| ; CHECK-NEXT: [[C3:%.*]] = icmp eq i8 [[V3:%.*]], 0 |
| ; CHECK-NEXT: [[V2_ADJ:%.*]] = add i8 [[V4:%.*]], [[V5:%.*]] |
| ; CHECK-NEXT: br i1 [[C3]], 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect2() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]] = select i1 [[C2]], i1 [[C3]], i1 false |
| ; 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: common.ret: |
| ; CHECK-NEXT: ret void |
| ; 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: br label [[COMMON_RET:%.*]] |
| ; CHECK: final_right: |
| ; CHECK-NEXT: call void @sideeffect1() |
| ; CHECK-NEXT: br label [[COMMON_RET]] |
| ; |
| 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:%.*]], [[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]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_NOT]], label [[IF_END_LOOPEXIT:%.*]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[C2:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: br i1 [[C2]], label [[FOR_INC]], label [[IF_END_LOOPEXIT]] |
| ; CHECK: for.bodythread-pre-split: |
| ; 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:%.*]], [[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]] = add i8 [[COUNTDOWN]], -1 |
| ; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i8 [[COUNTDOWN]], 0 |
| ; CHECK-NEXT: br i1 [[CMP_NOT]], label [[IF_END_LOOPEXIT:%.*]], label [[FOR_BODYTHREAD_PRE_SPLIT]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[C2:%.*]] = call i1 @gen1() |
| ; CHECK-NEXT: br i1 [[C2]], label [[FOR_INC]], label [[IF_END_LOOPEXIT]] |
| ; CHECK: for.bodythread-pre-split: |
| ; CHECK-NEXT: [[SHOULD_LOOPBACK:%.*]] = phi i1 [ true, [[FOR_INC]] ], [ false, [[FOR_BODYTHREAD_PRE_SPLIT_LOOPBACK:%.*]] ] |
| ; 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, ptr @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, ptr @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 |
| } |
| |
| @global_pr49510 = external global i16, align 1 |
| |
| define void @pr49510() { |
| ; CHECK-LABEL: @pr49510( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_COND:%.*]] |
| ; CHECK: for.cond: |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr @global_pr49510, align 1 |
| ; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i16 [[TMP0]], 0 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp slt i16 [[TMP0]], 0 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = and i1 [[TOBOOL]], [[CMP]] |
| ; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_COND]], label [[FOR_END:%.*]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %0 = load i16, ptr @global_pr49510, align 1 |
| %tobool = icmp ne i16 %0, 0 |
| br i1 %tobool, label %land.rhs, label %for.end |
| |
| land.rhs: |
| %cmp = icmp slt i16 %0, 0 |
| br i1 %cmp, label %for.cond, label %for.end |
| |
| for.end: |
| ret void |
| } |
| |
| ; FIXME: |
| ; This is a miscompile if we replace a phi incoming value |
| ; with an updated loaded value *after* it was stored. |
| |
| @global_pr51125 = global i32 1, align 4 |
| |
| define i32 @pr51125() { |
| ; CHECK-LABEL: @pr51125( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[L:%.*]] |
| ; CHECK: L: |
| ; CHECK-NEXT: [[LD:%.*]] = load i32, ptr @global_pr51125, align 4 |
| ; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[LD]], 0 |
| ; CHECK-NEXT: br i1 [[ISZERO]], label [[EXIT:%.*]], label [[L2:%.*]] |
| ; CHECK: L2: |
| ; CHECK-NEXT: store i32 -1, ptr @global_pr51125, align 4 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[LD]], -1 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[L]], label [[EXIT]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[LD]], [[L2]] ], [ [[LD]], [[L]] ] |
| ; CHECK-NEXT: ret i32 [[R]] |
| ; |
| entry: |
| br label %L |
| |
| L: |
| %ld = load i32, ptr @global_pr51125, align 4 |
| %iszero = icmp eq i32 %ld, 0 |
| br i1 %iszero, label %exit, label %L2 |
| |
| L2: |
| store i32 -1, ptr @global_pr51125, align 4 |
| %cmp = icmp eq i32 %ld, -1 |
| br i1 %cmp, label %L, label %exit |
| |
| exit: |
| %r = phi i32 [ %ld, %L2 ], [ %ld, %L ] |
| ret i32 %r |
| } |
| |
| ; https://github.com/llvm/llvm-project/issues/53861 |
| define i32 @firewall(ptr %data) { |
| ; CHECK-LABEL: @firewall( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[I:%.*]] = load i8, ptr [[DATA:%.*]], align 1 |
| ; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[DATA]], i64 64 |
| ; CHECK-NEXT: [[I2:%.*]] = load i16, ptr [[ADD_PTR]], align 2 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[I]], 17 |
| ; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i16 [[I2]], 1 |
| ; CHECK-NEXT: [[OR_COND:%.*]] = select i1 [[CMP]], i1 [[CMP3]], i1 false |
| ; CHECK-NEXT: [[CMP10:%.*]] = icmp eq i16 [[I2]], 2 |
| ; CHECK-NEXT: [[OR_COND33:%.*]] = select i1 [[CMP]], i1 [[CMP10]], i1 false |
| ; CHECK-NEXT: [[OR_COND1:%.*]] = select i1 [[OR_COND]], i1 true, i1 [[OR_COND33]] |
| ; CHECK-NEXT: [[CMP19:%.*]] = icmp eq i16 [[I2]], 3 |
| ; CHECK-NEXT: [[OR_COND34:%.*]] = select i1 [[CMP]], i1 [[CMP19]], i1 false |
| ; CHECK-NEXT: [[OR_COND2:%.*]] = select i1 [[OR_COND1]], i1 true, i1 [[OR_COND34]] |
| ; CHECK-NEXT: [[CMP28:%.*]] = icmp eq i16 [[I2]], 4 |
| ; CHECK-NEXT: [[OR_COND35:%.*]] = select i1 [[CMP]], i1 [[CMP28]], i1 false |
| ; CHECK-NEXT: [[DOT:%.*]] = zext i1 [[OR_COND35]] to i32 |
| ; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[OR_COND2]], i32 1, i32 [[DOT]] |
| ; CHECK-NEXT: ret i32 [[RETVAL_0]] |
| ; |
| entry: |
| %i = load i8, ptr %data, align 1 |
| %add.ptr = getelementptr inbounds i8, ptr %data, i64 64 |
| %i2 = load i16, ptr %add.ptr, align 2 |
| %cmp = icmp eq i8 %i, 17 |
| %cmp3 = icmp eq i16 %i2, 1 |
| %or.cond = select i1 %cmp, i1 %cmp3, i1 false |
| br i1 %or.cond, label %cleanup, label %if.end |
| |
| if.end: |
| %cmp10 = icmp eq i16 %i2, 2 |
| %or.cond33 = select i1 %cmp, i1 %cmp10, i1 false |
| br i1 %or.cond33, label %cleanup, label %if.end13 |
| |
| if.end13: |
| %cmp19 = icmp eq i16 %i2, 3 |
| %or.cond34 = select i1 %cmp, i1 %cmp19, i1 false |
| br i1 %or.cond34, label %cleanup, label %if.end22 |
| |
| if.end22: |
| %cmp28 = icmp eq i16 %i2, 4 |
| %or.cond35 = select i1 %cmp, i1 %cmp28, i1 false |
| %. = zext i1 %or.cond35 to i32 |
| br label %cleanup |
| |
| cleanup: |
| %retval.0 = phi i32 [ 1, %entry ], [ 1, %if.end ], [ 1, %if.end13 ], [ %., %if.end22 ] |
| ret i32 %retval.0 |
| } |
| |
| define i32 @test_builtin_fpclassify(float %x) { |
| ; CHECK-LABEL: @test_builtin_fpclassify( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[ISZERO:%.*]] = fcmp oeq float [[X:%.*]], 0.000000e+00 |
| ; CHECK-NEXT: br i1 [[ISZERO]], label [[FPCLASSIFY_END:%.*]], label [[FPCLASSIFY_NOT_ZERO:%.*]] |
| ; CHECK: fpclassify_end: |
| ; CHECK-NEXT: [[FPCLASSIFY_RESULT:%.*]] = phi i32 [ 2, [[ENTRY:%.*]] ], [ 0, [[FPCLASSIFY_NOT_ZERO]] ], [ 1, [[FPCLASSIFY_NOT_NAN:%.*]] ], [ [[NORMAL_OR_SUBNORMAL:%.*]], [[FPCLASSIFY_NOT_INF:%.*]] ] |
| ; CHECK-NEXT: ret i32 [[FPCLASSIFY_RESULT]] |
| ; CHECK: fpclassify_not_zero: |
| ; CHECK-NEXT: [[CMP:%.*]] = fcmp uno float [[X]], 0.000000e+00 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[FPCLASSIFY_END]], label [[FPCLASSIFY_NOT_NAN]] |
| ; CHECK: fpclassify_not_nan: |
| ; CHECK-NEXT: [[X_ABS:%.*]] = tail call float @llvm.fabs.f32(float [[X]]) |
| ; CHECK-NEXT: [[ISINF:%.*]] = fcmp oeq float [[X_ABS]], 0x7FF0000000000000 |
| ; CHECK-NEXT: br i1 [[ISINF]], label [[FPCLASSIFY_END]], label [[FPCLASSIFY_NOT_INF]] |
| ; CHECK: fpclassify_not_inf: |
| ; CHECK-NEXT: [[ISNORMAL:%.*]] = fcmp uge float [[X_ABS]], 0x3810000000000000 |
| ; CHECK-NEXT: [[NORMAL_OR_SUBNORMAL]] = select i1 [[ISNORMAL]], i32 4, i32 3 |
| ; CHECK-NEXT: br label [[FPCLASSIFY_END]] |
| ; |
| entry: |
| %iszero = fcmp oeq float %x, 0.000000e+00 |
| br i1 %iszero, label %fpclassify_end, label %fpclassify_not_zero |
| |
| fpclassify_end: |
| %fpclassify_result = phi i32 [ 2, %entry ], [ 0, %fpclassify_not_zero ], [ 1, %fpclassify_not_nan ], [ %normal_or_subnormal, %fpclassify_not_inf ] |
| ret i32 %fpclassify_result |
| |
| fpclassify_not_zero: |
| %cmp = fcmp uno float %x, 0.000000e+00 |
| br i1 %cmp, label %fpclassify_end, label %fpclassify_not_nan |
| |
| fpclassify_not_nan: |
| %x.abs = tail call float @llvm.fabs.f32(float %x) |
| %isinf = fcmp oeq float %x.abs, 0x7FF0000000000000 |
| br i1 %isinf, label %fpclassify_end, label %fpclassify_not_inf |
| |
| fpclassify_not_inf: |
| %isnormal = fcmp uge float %x.abs, 0x3810000000000000 |
| %normal_or_subnormal = select i1 %isnormal, i32 4, i32 3 |
| br label %fpclassify_end |
| } |
| |
| declare float @llvm.fabs.f32(float) |
| |
| attributes #0 = { nounwind argmemonly speculatable } |
