; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 ; RUN: opt -S -passes=loop-idiom < %s | FileCheck %s ; Make sure that any inserted LCSSA phi nodes are removed if the transform ; is aborted. define void @test() { ; CHECK-LABEL: define void @test() { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [64 x i8], align 16 ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: [[PHI:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ 1, [[LOOP_LATCH:%.*]] ] ; CHECK-NEXT: br i1 false, label [[LOOP_EXIT2:%.*]], label [[LOOP_LATCH]] ; CHECK: loop.latch: ; CHECK-NEXT: [[OR:%.*]] = or i64 [[PHI]], 4 ; CHECK-NEXT: br i1 false, label [[LOOP_EXIT:%.*]], label [[LOOP]] ; CHECK: loop.exit: ; CHECK-NEXT: [[OR_LCSSA:%.*]] = phi i64 [ [[OR]], [[LOOP_LATCH]] ] ; CHECK-NEXT: br label [[LOOP2_PREHEADER:%.*]] ; CHECK: loop.exit2: ; CHECK-NEXT: br label [[LOOP2_PREHEADER]] ; CHECK: loop2.preheader: ; CHECK-NEXT: [[PHI5_PH:%.*]] = phi ptr [ null, [[LOOP_EXIT2]] ], [ [[ALLOCA]], [[LOOP_EXIT]] ] ; CHECK-NEXT: [[PHI6_PH:%.*]] = phi i64 [ 0, [[LOOP_EXIT2]] ], [ [[OR_LCSSA]], [[LOOP_EXIT]] ] ; CHECK-NEXT: br label [[LOOP2:%.*]] ; CHECK: loop2: ; CHECK-NEXT: [[PHI5:%.*]] = phi ptr [ [[GETELEMENTPTR7:%.*]], [[LOOP2]] ], [ [[PHI5_PH]], [[LOOP2_PREHEADER]] ] ; CHECK-NEXT: [[PHI6:%.*]] = phi i64 [ [[ADD:%.*]], [[LOOP2]] ], [ [[PHI6_PH]], [[LOOP2_PREHEADER]] ] ; CHECK-NEXT: [[GETELEMENTPTR:%.*]] = getelementptr i8, ptr [[ALLOCA]], i64 [[PHI6]] ; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[GETELEMENTPTR]], align 1 ; CHECK-NEXT: store i8 [[LOAD]], ptr [[PHI5]], align 1 ; CHECK-NEXT: [[GETELEMENTPTR7]] = getelementptr i8, ptr [[PHI5]], i64 1 ; CHECK-NEXT: [[ADD]] = add i64 [[PHI6]], 1 ; CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[PHI6]], 0 ; CHECK-NEXT: br i1 [[ICMP]], label [[LOOP2_EXIT:%.*]], label [[LOOP2]] ; CHECK: loop2.exit: ; CHECK-NEXT: ret void ; entry: %alloca = alloca [64 x i8], align 16 br label %loop loop: %phi = phi i64 [ 0, %entry ], [ 1, %loop.latch ] br i1 false, label %loop.exit2, label %loop.latch loop.latch: %or = or i64 %phi, 4 br i1 false, label %loop.exit, label %loop loop.exit: br label %loop2.preheader loop.exit2: br label %loop2.preheader loop2.preheader: %phi5.ph = phi ptr [ null, %loop.exit2 ], [ %alloca, %loop.exit ] %phi6.ph = phi i64 [ 0, %loop.exit2 ], [ %or, %loop.exit ] br label %loop2 loop2: %phi5 = phi ptr [ %getelementptr7, %loop2 ], [ %phi5.ph, %loop2.preheader ] %phi6 = phi i64 [ %add, %loop2 ], [ %phi6.ph, %loop2.preheader ] %getelementptr = getelementptr i8, ptr %alloca, i64 %phi6 %load = load i8, ptr %getelementptr, align 1 store i8 %load, ptr %phi5, align 1 %getelementptr7 = getelementptr i8, ptr %phi5, i64 1 %add = add i64 %phi6, 1 %icmp = icmp eq i64 %phi6, 0 br i1 %icmp, label %loop2.exit, label %loop2 loop2.exit: ret void }