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