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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s3 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 mustprogress14define 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:%.*]], 018; 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 1225; 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 i6428; 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]], 132; 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, 037 br i1 %cmp7, label %for.body.preheader, label %for.cond.cleanup38 39for.body.preheader: ; preds = %entry40 br label %for.body41 42for.cond.cleanup.loopexit: ; preds = %for.body43 br label %for.cond.cleanup44 45for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry46 ret i32 1247 48for.body: ; preds = %for.body.preheader, %for.body49 %i.08 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]50 %idxprom = zext i32 %i.08 to i6451 %arrayidx = getelementptr inbounds %struct.S, ptr %b, i64 %idxprom52 %arrayidx2 = getelementptr inbounds %struct.S, ptr %a, i64 %idxprom53 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, 155 %cmp = icmp slt i32 %inc, %n56 br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit57}58 59; Function Attrs: argmemonly nofree nosync nounwind willreturn60declare void @llvm.memcpy.inline.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #161