| ; Test strcpy using MVST. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| declare ptr@strcpy(ptr %dest, ptr %src) |
| declare ptr@stpcpy(ptr %dest, ptr %src) |
| |
| ; Check strcpy. |
| define ptr@f1(ptr %dest, ptr %src) { |
| ; CHECK-LABEL: f1: |
| ; CHECK-DAG: lhi %r0, 0 |
| ; CHECK-DAG: lgr [[REG:%r[145]]], %r2 |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK-NEXT: mvst [[REG]], %r3 |
| ; CHECK-NEXT: jo [[LABEL]] |
| ; CHECK-NOT: %r2 |
| ; CHECK: br %r14 |
| %res = call ptr@strcpy(ptr %dest, ptr %src) |
| ret ptr %res |
| } |
| |
| ; Check stpcpy. |
| define ptr@f2(ptr %dest, ptr %src) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lhi %r0, 0 |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK-NEXT: mvst %r2, %r3 |
| ; CHECK-NEXT: jo [[LABEL]] |
| ; CHECK-NOT: %r2 |
| ; CHECK: br %r14 |
| %res = call ptr@stpcpy(ptr %dest, ptr %src) |
| ret ptr %res |
| } |
| |
| ; Check correct operation with other loads and stores. The load must |
| ; come before the loop and the store afterwards. |
| define i32 @f3(i32 %dummy, ptr %dest, ptr %src, ptr %resptr, ptr %storeptr) { |
| ; CHECK-LABEL: f3: |
| ; CHECK-DAG: lhi %r0, 0 |
| ; CHECK-DAG: l %r2, 0(%r5) |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK-NEXT: mvst %r3, %r4 |
| ; CHECK-NEXT: jo [[LABEL]] |
| ; CHECK: mvhi 0(%r6), 0 |
| ; CHECK: br %r14 |
| %res = load i32, ptr %resptr |
| %unused = call ptr@strcpy(ptr %dest, ptr %src) |
| store i32 0, ptr %storeptr |
| ret i32 %res |
| } |