1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=loop-idiom < %s -S | FileCheck %s 3 4 5define dso_local void @double_memset(ptr nocapture %p, ptr noalias nocapture %q, i32 %n) { 6; CHECK-LABEL: @double_memset( 7; CHECK-NEXT: entry: 8; CHECK-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[N:%.*]], 0 9; CHECK-NEXT: br i1 [[CMP4]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]] 10; CHECK: for.body.preheader: 11; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[N]] to i64 12; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 1 [[Q:%.*]], i8 0, i64 [[TMP0]], i1 false) 13; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[N]] to i64 14; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 1 [[P:%.*]], i8 0, i64 [[TMP1]], i1 false) 15; CHECK-NEXT: br label [[FOR_BODY:%.*]] 16; CHECK: for.cond.cleanup.loopexit: 17; CHECK-NEXT: br label [[FOR_COND_CLEANUP]] 18; CHECK: for.cond.cleanup: 19; CHECK-NEXT: ret void 20; CHECK: for.body: 21; CHECK-NEXT: [[I_07:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_PREHEADER]] ] 22; CHECK-NEXT: [[P_ADDR_06:%.*]] = phi ptr [ [[INCDEC_PTR1:%.*]], [[FOR_BODY]] ], [ [[P]], [[FOR_BODY_PREHEADER]] ] 23; CHECK-NEXT: [[Q_ADDR_05:%.*]] = phi ptr [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ], [ [[Q]], [[FOR_BODY_PREHEADER]] ] 24; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i8, ptr [[Q_ADDR_05]], i64 1 25; CHECK-NEXT: [[INCDEC_PTR1]] = getelementptr inbounds i8, ptr [[P_ADDR_06]], i64 1 26; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_07]], 1 27; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[INC]], [[N]] 28; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[FOR_BODY]] 29; 30entry: 31 %cmp4 = icmp sgt i32 %n, 0 32 br i1 %cmp4, label %for.body, label %for.cond.cleanup 33 34for.cond.cleanup: 35 ret void 36 37for.body: 38 %i.07 = phi i32 [ %inc, %for.body ], [ 0, %entry ] 39 %p.addr.06 = phi ptr [ %incdec.ptr1, %for.body ], [ %p, %entry ] 40 %q.addr.05 = phi ptr [ %incdec.ptr, %for.body ], [ %q, %entry ] 41 %incdec.ptr = getelementptr inbounds i8, ptr %q.addr.05, i64 1 42 store i8 0, ptr %q.addr.05, align 1 43 %incdec.ptr1 = getelementptr inbounds i8, ptr %p.addr.06, i64 1 44 store i8 0, ptr %p.addr.06, align 1 45 %inc = add nuw nsw i32 %i.07, 1 46 %exitcond.not = icmp eq i32 %inc, %n 47 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body 48} 49