62 lines · plain
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -S -passes=loop-unroll -unroll-force-peel-count=1 | FileCheck %s3 4define i32 @invariant_backedge_irreducible(i32 %a, i32 %b) {5; CHECK-LABEL: @invariant_backedge_irreducible(6; CHECK-NEXT: entry:7; CHECK-NEXT: br label [[HEADER_PEEL_BEGIN:%.*]]8; CHECK: header.peel.begin:9; CHECK-NEXT: br label [[HEADER_PEEL:%.*]]10; CHECK: header.peel:11; CHECK-NEXT: br i1 false, label [[LATCH_PEEL:%.*]], label [[EXITING_PEEL:%.*]]12; CHECK: latch.peel:13; CHECK-NEXT: [[INC_PEEL:%.*]] = add i32 0, 114; CHECK-NEXT: [[CMP_PEEL:%.*]] = icmp slt i32 0, 100015; CHECK-NEXT: br i1 [[CMP_PEEL]], label [[HEADER_PEEL_NEXT:%.*]], label [[EXITING_PEEL]]16; CHECK: exiting.peel:17; CHECK-NEXT: [[CMP_EXITING_PEEL:%.*]] = phi i1 [ false, [[HEADER_PEEL]] ], [ [[CMP_PEEL]], [[LATCH_PEEL]] ]18; CHECK-NEXT: br i1 [[CMP_EXITING_PEEL]], label [[LATCH_PEEL]], label [[EXIT:%.*]]19; CHECK: header.peel.next:20; CHECK-NEXT: br label [[HEADER_PEEL_NEXT1:%.*]]21; CHECK: header.peel.next1:22; CHECK-NEXT: br label [[ENTRY_PEEL_NEWPH:%.*]]23; CHECK: entry.peel.newph:24; CHECK-NEXT: br label [[HEADER:%.*]]25; CHECK: header:26; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[INC_PEEL]], [[ENTRY_PEEL_NEWPH]] ], [ [[INC:%.*]], [[LATCH:%.*]] ]27; CHECK-NEXT: [[CMP_PHI:%.*]] = phi i1 [ [[CMP_PEEL]], [[ENTRY_PEEL_NEWPH]] ], [ [[CMP:%.*]], [[LATCH]] ]28; CHECK-NEXT: br i1 [[CMP_PHI]], label [[LATCH]], label [[EXITING:%.*]]29; CHECK: latch:30; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 131; CHECK-NEXT: [[CMP]] = icmp slt i32 [[I]], 100032; CHECK-NEXT: br i1 [[CMP]], label [[HEADER]], label [[EXITING]], !llvm.loop [[LOOP0:![0-9]+]]33; CHECK: exiting:34; CHECK-NEXT: [[CMP_EXITING:%.*]] = phi i1 [ [[CMP_PHI]], [[HEADER]] ], [ [[CMP]], [[LATCH]] ]35; CHECK-NEXT: br i1 [[CMP_EXITING]], label [[LATCH]], label [[EXIT_LOOPEXIT:%.*]]36; CHECK: exit.loopexit:37; CHECK-NEXT: br label [[EXIT]]38; CHECK: exit:39; CHECK-NEXT: ret i32 040;41entry:42 br label %header43 44header:45 %i = phi i32 [ 0, %entry ], [ %inc, %latch ]46 %cmp.phi = phi i1 [ false, %entry ], [ %cmp, %latch ]47 br i1 %cmp.phi, label %latch, label %exiting48 49latch:50 %inc = add i32 %i, 151 %cmp = icmp slt i32 %i, 100052 br i1 %cmp, label %header, label %exiting53 54exiting:55 %cmp.exiting = phi i1 [ %cmp.phi, %header ], [ %cmp, %latch ]56 br i1 %cmp.exiting, label %latch, label %exit57 58exit:59 ret i32 060}61 62