| ; Test strlen using SRST, i32 version. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| declare i32 @strlen(i8 *%src) |
| declare i32 @strnlen(i8 *%src, i32 %len) |
| |
| ; Test strlen with an i32-based prototype. It would also be valid for |
| ; the uses of %r3 and REG after the LGR to be swapped. |
| define i32 @f1(i32 %dummy, i8 *%src) { |
| ; CHECK-LABEL: f1: |
| ; CHECK-DAG: lhi %r0, 0 |
| ; CHECK-DAG: lghi %r2, 0 |
| ; CHECK-DAG: lgr [[REG:%r[145]]], %r3 |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK-NEXT: srst %r2, [[REG]] |
| ; CHECK-NEXT: jo [[LABEL]] |
| ; CHECK-NEXT: BB#{{[0-9]+}} |
| ; CHECK-NEXT: sgr %r2, %r3 |
| ; CHECK: br %r14 |
| %res = call i32 @strlen(i8 *%src) |
| ret i32 %res |
| } |
| |
| ; Test strnlen with an i32-based prototype. |
| define i32 @f2(i32 zeroext %len, i8 *%src) { |
| ; CHECK-LABEL: f2: |
| ; CHECK-DAG: agr %r2, %r3 |
| ; CHECK-DAG: lhi %r0, 0 |
| ; CHECK-DAG: lgr [[REG:%r[145]]], %r3 |
| ; CHECK: [[LABEL:\.[^:]*]]: |
| ; CHECK-NEXT: srst %r2, [[REG]] |
| ; CHECK-NEXT: jo [[LABEL]] |
| ; CHECK-NEXT: BB#{{[0-9]+}} |
| ; CHECK-NEXT: sgr %r2, %r3 |
| ; CHECK: br %r14 |
| %res = call i32 @strnlen(i8 *%src, i32 %len) |
| ret i32 %res |
| } |