1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s 3 4%struct.S = type { i32, i32, i8 } 5 6; unsigned copy_noalias(S* __restrict a, S *b, int n) { 7; for (int i = 0; i < n; i++) { 8; a[i] = b[i]; 9; } 10; return sizeof(a[0]); 11; } 12 13; Function Attrs: nofree nounwind uwtable mustprogress 14define dso_local i32 @copy_noalias(ptr noalias nocapture %a, ptr nocapture readonly %b, i32 %n) local_unnamed_addr #0 { 15; CHECK-LABEL: @copy_noalias( 16; CHECK-NEXT: entry: 17; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[N:%.*]], 0 18; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]] 19; CHECK: for.body.preheader: 20; CHECK-NEXT: br label [[FOR_BODY:%.*]] 21; CHECK: for.cond.cleanup.loopexit: 22; CHECK-NEXT: br label [[FOR_COND_CLEANUP]] 23; CHECK: for.cond.cleanup: 24; CHECK-NEXT: ret i32 12 25; CHECK: for.body: 26; CHECK-NEXT: [[I_08:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ] 27; CHECK-NEXT: [[IDXPROM:%.*]] = zext i32 [[I_08]] to i64 28; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [[STRUCT_S:%.*]], ptr [[B:%.*]], i64 [[IDXPROM]] 29; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds [[STRUCT_S]], ptr [[A:%.*]], i64 [[IDXPROM]] 30; CHECK-NEXT: call void @llvm.memcpy.inline.p0.p0.i64(ptr nonnull align 4 dereferenceable(12) [[ARRAYIDX2]], ptr nonnull align 4 dereferenceable(12) [[ARRAYIDX]], i64 12, i1 false) 31; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_08]], 1 32; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]] 33; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]] 34; 35entry: 36 %cmp7 = icmp sgt i32 %n, 0 37 br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup 38 39for.body.preheader: ; preds = %entry 40 br label %for.body 41 42for.cond.cleanup.loopexit: ; preds = %for.body 43 br label %for.cond.cleanup 44 45for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry 46 ret i32 12 47 48for.body: ; preds = %for.body.preheader, %for.body 49 %i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ] 50 %idxprom = zext i32 %i.08 to i64 51 %arrayidx = getelementptr inbounds %struct.S, ptr %b, i64 %idxprom 52 %arrayidx2 = getelementptr inbounds %struct.S, ptr %a, i64 %idxprom 53 call void @llvm.memcpy.inline.p0.p0.i64(ptr nonnull align 4 dereferenceable(12) %arrayidx2, ptr nonnull align 4 dereferenceable(12) %arrayidx, i64 12, i1 false) 54 %inc = add nuw nsw i32 %i.08, 1 55 %cmp = icmp slt i32 %inc, %n 56 br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit 57} 58 59; Function Attrs: argmemonly nofree nosync nounwind willreturn 60declare void @llvm.memcpy.inline.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1 61