| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -passes='loop(indvars,loop-deletion)' -S %s | FileCheck %s |
| |
| ; Make sure indvarsimplify properly forgets the exit value %p.2.lcssa phi after |
| ; modifying it. Loop deletion is required to show the incorrect use of the cached |
| ; SCEV value. |
| |
| define void @test(i1 %c) { |
| ; CHECK-LABEL: @test( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[HEADER_1:%.*]] |
| ; CHECK: header.1.loopexit: |
| ; CHECK-NEXT: br label [[HEADER_1_BACKEDGE:%.*]] |
| ; CHECK: header.1: |
| ; CHECK-NEXT: br label [[HEADER_2:%.*]] |
| ; CHECK: header.2: |
| ; CHECK-NEXT: br i1 [[C:%.*]], label [[LATCH_1:%.*]], label [[LATCH_2:%.*]] |
| ; CHECK: latch.1: |
| ; CHECK-NEXT: br label [[HEADER_1_LOOPEXIT:%.*]] |
| ; CHECK: latch.2: |
| ; CHECK-NEXT: br label [[HEADER_1_BACKEDGE]] |
| ; CHECK: header.1.backedge: |
| ; CHECK-NEXT: br label [[HEADER_1]] |
| ; |
| entry: |
| br label %header.1 |
| |
| header.1: |
| %p.1 = phi i32 [ 0, %entry ], [ %p.2.lcssa, %latch.2 ], [ 0, %latch.1 ] |
| br label %header.2 |
| |
| header.2: |
| %p.2 = phi i32 [ %p.1, %header.1 ], [ %p.2.next, %latch.1 ] |
| br i1 %c, label %latch.1, label %latch.2 |
| |
| latch.1: |
| %p.2.next = add i32 %p.2, 1 |
| br i1 false, label %header.2, label %header.1 |
| |
| latch.2: |
| %p.2.lcssa = phi i32 [ %p.2, %header.2 ] |
| br label %header.1 |
| } |
| |
| define i8 @test_pr52023(i1 %c.1, i1 %c.2) { |
| ; CHECK-LABEL: @test_pr52023( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP_1:%.*]] |
| ; CHECK: loop.1: |
| ; CHECK-NEXT: [[INC79:%.*]] = phi i8 [ [[TMP0:%.*]], [[LOOP_1_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: [[TMP0]] = add i8 [[INC79]], 1 |
| ; CHECK-NEXT: br label [[LOOP_2:%.*]] |
| ; CHECK: loop.2: |
| ; CHECK-NEXT: br i1 [[C_1:%.*]], label [[LOOP_2_LATCH:%.*]], label [[LOOP_1_LATCH]] |
| ; CHECK: loop.2.latch: |
| ; CHECK-NEXT: br label [[LOOP_1_LATCH]] |
| ; CHECK: loop.1.latch: |
| ; CHECK-NEXT: br i1 [[C_2:%.*]], label [[EXIT:%.*]], label [[LOOP_1]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: [[INC_LCSSA_LCSSA:%.*]] = phi i8 [ [[TMP0]], [[LOOP_1_LATCH]] ] |
| ; CHECK-NEXT: ret i8 [[INC_LCSSA_LCSSA]] |
| ; |
| entry: |
| br label %loop.1 |
| |
| loop.1: |
| %inc79 = phi i8 [ %inc.lcssa, %loop.1.latch ], [ 0, %entry ] |
| br label %loop.2 |
| |
| loop.2: |
| %inc6 = phi i8 [ %inc79, %loop.1 ], [ %inc, %loop.2.latch ] |
| %inc = add i8 %inc6, 1 |
| br i1 %c.1, label %loop.2.latch , label %loop.1.latch |
| |
| loop.2.latch: |
| br i1 false, label %loop.2, label %loop.1.latch |
| |
| loop.1.latch: |
| %inc.lcssa = phi i8 [ %inc, %loop.2.latch ], [ undef, %loop.2 ] |
| br i1 %c.2, label %exit, label %loop.1 |
| |
| exit: |
| %inc.lcssa.lcssa = phi i8 [ %inc.lcssa, %loop.1.latch ] |
| ret i8 %inc.lcssa.lcssa |
| } |