| ; REQUIRES: asserts |
| ; RUN: opt < %s -instcombine -licm -loop-unswitch -enable-new-pm=0 -loop-unswitch-threshold=1000 -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output -stats 2>&1| FileCheck %s |
| ; Check no loop unswitch is done because unswitching of equality expr with |
| ; undef is unsafe before the freeze patch is committed. |
| ; CHECK-NOT: Number of branches unswitched |
| |
| define void @ham(i64 %arg) local_unnamed_addr { |
| bb: |
| %tmp = icmp eq i64 %arg, 0 |
| br i1 %tmp, label %bb3, label %bb1 |
| |
| bb1: ; preds = %bb |
| %tmp2 = load volatile i64, i64* @global, align 8 |
| br label %bb3 |
| |
| bb3: ; preds = %bb1, %bb |
| %tmp4 = phi i64 [ %tmp2, %bb1 ], [ undef, %bb ] |
| %tmp5 = load i64, i64* @global.1, align 8 |
| br label %bb6 |
| |
| bb6: ; preds = %bb21, %bb3 |
| %tmp7 = phi i64 [ 3, %bb21 ], [ %tmp5, %bb3 ] |
| %tmp8 = phi i64 [ %tmp25, %bb21 ], [ 0, %bb3 ] |
| %tmp9 = icmp eq i64 %tmp7, %arg |
| br i1 %tmp9, label %bb10, label %bb28 |
| |
| bb10: ; preds = %bb6 |
| %tmp11 = icmp eq i64 %tmp7, 0 |
| br i1 %tmp11, label %bb21, label %bb12 |
| |
| bb12: ; preds = %bb10 |
| %tmp13 = load i64, i64* @global.2, align 8 |
| %tmp14 = add nsw i64 %tmp13, 1 |
| store i64 %tmp14, i64* @global.2, align 8 |
| %tmp15 = load i64, i64* @global.3, align 8 |
| %tmp16 = icmp eq i64 %tmp15, %tmp4 |
| br i1 %tmp16, label %bb17, label %bb21 |
| |
| bb17: ; preds = %bb12 |
| %tmp18 = phi i64 [ %tmp15, %bb12 ] |
| %tmp19 = load i64, i64* @global.4, align 8 |
| %tmp20 = add nsw i64 %tmp19, %tmp18 |
| store i64 %tmp20, i64* @global.5, align 8 |
| br label %bb29 |
| |
| bb21: ; preds = %bb12, %bb10 |
| %tmp22 = load i64, i64* @global.3, align 8 |
| %tmp23 = load volatile i64, i64* @global, align 8 |
| %tmp24 = add nsw i64 %tmp23, %tmp22 |
| store i64 %tmp24, i64* @global.5, align 8 |
| store i64 3, i64* @global.1, align 8 |
| %tmp25 = add nsw i64 %tmp8, 1 |
| %tmp26 = load i64, i64* @global.6, align 8 |
| %tmp27 = icmp slt i64 %tmp25, %tmp26 |
| br i1 %tmp27, label %bb6, label %bb28 |
| |
| bb28: ; preds = %bb21, %bb6 |
| br label %bb29 |
| |
| bb29: ; preds = %bb28, %bb17 |
| ret void |
| } |
| |
| define void @zot(i64 %arg, i64 %arg1) local_unnamed_addr { |
| bb: |
| %tmp = icmp eq i64 %arg, 0 |
| %tmp2 = select i1 %tmp, i64 %arg1, i64 undef |
| %tmp3 = load i64, i64* @global.1, align 8 |
| br label %bb4 |
| |
| bb4: ; preds = %bb19, %bb |
| %tmp5 = phi i64 [ 3, %bb19 ], [ %tmp3, %bb ] |
| %tmp6 = phi i64 [ %tmp23, %bb19 ], [ 0, %bb ] |
| %tmp7 = icmp eq i64 %tmp5, %arg |
| br i1 %tmp7, label %bb8, label %bb26 |
| |
| bb8: ; preds = %bb4 |
| %tmp9 = icmp eq i64 %tmp5, 0 |
| br i1 %tmp9, label %bb19, label %bb10 |
| |
| bb10: ; preds = %bb8 |
| %tmp11 = load i64, i64* @global.2, align 8 |
| %tmp12 = add nsw i64 %tmp11, 1 |
| store i64 %tmp12, i64* @global.2, align 8 |
| %tmp13 = load i64, i64* @global.3, align 8 |
| %tmp14 = icmp eq i64 %tmp13, %tmp2 |
| br i1 %tmp14, label %bb15, label %bb19 |
| |
| bb15: ; preds = %bb10 |
| %tmp16 = phi i64 [ %tmp13, %bb10 ] |
| %tmp17 = load i64, i64* @global.4, align 8 |
| %tmp18 = add nsw i64 %tmp17, %tmp16 |
| store i64 %tmp18, i64* @global.5, align 8 |
| br label %bb27 |
| |
| bb19: ; preds = %bb10, %bb8 |
| %tmp20 = load i64, i64* @global.3, align 8 |
| %tmp21 = load volatile i64, i64* @global, align 8 |
| %tmp22 = add nsw i64 %tmp21, %tmp20 |
| store i64 %tmp22, i64* @global.5, align 8 |
| store i64 3, i64* @global.1, align 8 |
| %tmp23 = add nsw i64 %tmp6, 1 |
| %tmp24 = load i64, i64* @global.6, align 8 |
| %tmp25 = icmp slt i64 %tmp23, %tmp24 |
| br i1 %tmp25, label %bb4, label %bb26 |
| |
| bb26: ; preds = %bb19, %bb4 |
| br label %bb27 |
| |
| bb27: ; preds = %bb26, %bb15 |
| ret void |
| } |
| |
| @global = common global i64 0, align 8 |
| @global.1 = common global i64 0, align 8 |
| @global.2 = common global i64 0, align 8 |
| @global.3 = common global i64 0, align 8 |
| @global.4 = common global i64 0, align 8 |
| @global.5 = common global i64 0, align 8 |
| @global.6 = common global i64 0, align 8 |
| |
| |
