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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 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:%.*]], 09; 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 i6412; 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 i6414; 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 void20; 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 125; CHECK-NEXT: [[INCDEC_PTR1]] = getelementptr inbounds i8, ptr [[P_ADDR_06]], i64 126; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_07]], 127; 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, 032 br i1 %cmp4, label %for.body, label %for.cond.cleanup33 34for.cond.cleanup:35 ret void36 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 142 store i8 0, ptr %q.addr.05, align 143 %incdec.ptr1 = getelementptr inbounds i8, ptr %p.addr.06, i64 144 store i8 0, ptr %p.addr.06, align 145 %inc = add nuw nsw i32 %i.07, 146 %exitcond.not = icmp eq i32 %inc, %n47 br i1 %exitcond.not, label %for.cond.cleanup, label %for.body48}49