| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=loop-simplify -S | FileCheck %s |
| |
| ; Tests loop-simplify does not move the loop metadata, because |
| ; the loopexit block is not the latch of the loop _bb6. |
| |
| define void @func(i1 %p) { |
| ; CHECK-LABEL: @func( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header.loopexit: |
| ; CHECK-NEXT: br label [[LOOP_HEADER]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: br i1 [[P:%.*]], label [[BB1:%.*]], label [[EXIT:%.*]] |
| ; CHECK: bb1: |
| ; CHECK-NEXT: br i1 [[P]], label [[BB2:%.*]], label [[BB3:%.*]] |
| ; CHECK: bb2: |
| ; CHECK-NEXT: br label [[BB3]] |
| ; CHECK: bb3: |
| ; CHECK-NEXT: br label [[LOOP_LATCH:%.*]] |
| ; CHECK: loop.latch: |
| ; CHECK-NEXT: br i1 [[P]], label [[LOOP_LATCH]], label [[LOOP_HEADER_LOOPEXIT:%.*]], !llvm.loop [[LOOP0]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop.header |
| |
| loop.header: |
| br i1 %p, label %bb1, label %exit |
| |
| bb1: |
| br i1 %p, label %bb2, label %bb3 |
| |
| bb2: |
| br label %bb3 |
| |
| bb3: |
| br label %loop.latch |
| |
| loop.latch: |
| br i1 %p, label %loop.latch, label %loop.header, !llvm.loop !0 |
| |
| exit: |
| ret void |
| } |
| |
| !0 = distinct !{!0, !1} |
| !1 = !{!"llvm.loop.mustprogress"} |