1 ; Test strcpy using MVST. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare i8 *@strcpy(i8 *%dest, i8 *%src) 6 declare i8 *@stpcpy(i8 *%dest, i8 *%src) 7 8 ; Check strcpy. 9 define i8 *@f1(i8 *%dest, i8 *%src) { 10 ; CHECK-LABEL: f1: 11 ; CHECK-DAG: lhi %r0, 0 12 ; CHECK-DAG: lgr [[REG:%r[145]]], %r2 13 ; CHECK: [[LABEL:\.[^:]*]]: 14 ; CHECK-NEXT: mvst [[REG]], %r3 15 ; CHECK-NEXT: jo [[LABEL]] 16 ; CHECK-NOT: %r2 17 ; CHECK: br %r14 18 %res = call i8 *@strcpy(i8 *%dest, i8 *%src) 19 ret i8 *%res 20 } 21 22 ; Check stpcpy. 23 define i8 *@f2(i8 *%dest, i8 *%src) { 24 ; CHECK-LABEL: f2: 25 ; CHECK: lhi %r0, 0 26 ; CHECK: [[LABEL:\.[^:]*]]: 27 ; CHECK-NEXT: mvst %r2, %r3 28 ; CHECK-NEXT: jo [[LABEL]] 29 ; CHECK-NOT: %r2 30 ; CHECK: br %r14 31 %res = call i8 *@stpcpy(i8 *%dest, i8 *%src) 32 ret i8 *%res 33 } 34 35 ; Check correct operation with other loads and stores. The load must 36 ; come before the loop and the store afterwards. 37 define i32 @f3(i32 %dummy, i8 *%dest, i8 *%src, i32 *%resptr, i32 *%storeptr) { 38 ; CHECK-LABEL: f3: 39 ; CHECK-DAG: lhi %r0, 0 40 ; CHECK-DAG: l %r2, 0(%r5) 41 ; CHECK: [[LABEL:\.[^:]*]]: 42 ; CHECK-NEXT: mvst %r3, %r4 43 ; CHECK-NEXT: jo [[LABEL]] 44 ; CHECK: mvhi 0(%r6), 0 45 ; CHECK: br %r14 46 %res = load i32 , i32 *%resptr 47 %unused = call i8 *@strcpy(i8 *%dest, i8 *%src) 48 store i32 0, i32 *%storeptr 49 ret i32 %res 50 } 51
