| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes="loop-mssa(loop-deletion,simple-loop-unswitch<nontrivial;trivial>),loop(indvars)" -verify-scev -S %s | FileCheck %s |
| |
| define void @pr58868(i1 %c.1, ptr %src, ptr %dst) { |
| ; CHECK-LABEL: @pr58868( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br i1 [[C_1:%.*]], label [[ENTRY_SPLIT_US:%.*]], label [[ENTRY_SPLIT:%.*]] |
| ; CHECK: entry.split.us: |
| ; CHECK-NEXT: br label [[OUTER_HEADER_US:%.*]] |
| ; CHECK: outer.header.us: |
| ; CHECK-NEXT: br label [[OUTER_BB1_US:%.*]] |
| ; CHECK: outer.bb1.us: |
| ; CHECK-NEXT: br label [[OUTER_BB2_US:%.*]] |
| ; CHECK: outer.bb2.us: |
| ; CHECK-NEXT: [[LV_US:%.*]] = load i16, ptr [[SRC:%.*]], align 1 |
| ; CHECK-NEXT: br i1 true, label [[OUTER_HEADER_LOOPEXIT_US:%.*]], label [[OUTER_BB2_SPLIT_SPLIT_US:%.*]] |
| ; CHECK: outer.header.loopexit.us: |
| ; CHECK-NEXT: br label [[OUTER_HEADER_US]] |
| ; CHECK: outer.bb2.split.split.us: |
| ; CHECK-NEXT: [[LV_LCSSA_US:%.*]] = phi i16 [ [[LV_US]], [[OUTER_BB2_US]] ] |
| ; CHECK-NEXT: br label [[OUTER_BB2_SPLIT:%.*]] |
| ; CHECK: entry.split: |
| ; CHECK-NEXT: br label [[OUTER_HEADER:%.*]] |
| ; CHECK: outer.header.loopexit: |
| ; CHECK-NEXT: unreachable |
| ; CHECK: outer.header: |
| ; CHECK-NEXT: br label [[OUTER_BB2:%.*]] |
| ; CHECK: outer.bb2: |
| ; CHECK-NEXT: [[LV:%.*]] = load i16, ptr [[SRC]], align 1 |
| ; CHECK-NEXT: br i1 false, label [[OUTER_HEADER_LOOPEXIT:%.*]], label [[OUTER_BB2_SPLIT_SPLIT:%.*]] |
| ; CHECK: outer.bb2.split.split: |
| ; CHECK-NEXT: [[LV_LCSSA:%.*]] = phi i16 [ [[LV]], [[OUTER_BB2]] ] |
| ; CHECK-NEXT: br label [[OUTER_BB2_SPLIT]] |
| ; CHECK: outer.bb2.split: |
| ; CHECK-NEXT: [[DOTUS_PHI:%.*]] = phi i16 [ [[LV_LCSSA]], [[OUTER_BB2_SPLIT_SPLIT]] ], [ [[LV_LCSSA_US]], [[OUTER_BB2_SPLIT_SPLIT_US]] ] |
| ; CHECK-NEXT: br label [[INNER_HEADER:%.*]] |
| ; CHECK: inner.header: |
| ; CHECK-NEXT: [[IV:%.*]] = phi i16 [ [[DOTUS_PHI]], [[OUTER_BB2_SPLIT]] ], [ [[IV_NEXT:%.*]], [[INNER_LATCH:%.*]] ] |
| ; CHECK-NEXT: br label [[INNER_LATCH]] |
| ; CHECK: inner.latch: |
| ; CHECK-NEXT: [[IV_NEXT]] = add nsw i16 [[IV]], 1 |
| ; CHECK-NEXT: store i16 0, ptr [[DST:%.*]], align 1 |
| ; CHECK-NEXT: [[C_2:%.*]] = icmp ne i16 [[IV]], 0 |
| ; CHECK-NEXT: br i1 [[C_2]], label [[INNER_HEADER]], label [[EXIT:%.*]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %outer.header |
| |
| outer.header: |
| br i1 %c.1, label %outer.bb1, label %outer.bb2 |
| |
| outer.bb1: |
| br label %outer.bb2 |
| |
| outer.bb2: |
| %lv = load i16, ptr %src, align 1 |
| br label %inner.header |
| |
| inner.header: |
| %iv = phi i16 [ %lv, %outer.bb2 ], [ %iv.next, %inner.latch ] |
| br i1 %c.1, label %outer.header, label %inner.latch |
| |
| inner.latch: |
| %iv.next = add nsw i16 %iv, 1 |
| store i16 0, ptr %dst, align 1 |
| %c.2 = icmp ne i16 %iv, 0 |
| br i1 %c.2, label %inner.header, label %exit |
| |
| exit: |
| ret void |
| } |