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51 lines
1.3 KiB
LLVM
51 lines
1.3 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 i8 *@strcpy(i8 *%dest, i8 *%src)
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declare i8 *@stpcpy(i8 *%dest, i8 *%src)
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; Check strcpy.
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define i8 *@f1(i8 *%dest, i8 *%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 i8 *@strcpy(i8 *%dest, i8 *%src)
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ret i8 *%res
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}
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; Check stpcpy.
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define i8 *@f2(i8 *%dest, i8 *%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 i8 *@stpcpy(i8 *%dest, i8 *%src)
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ret i8 *%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, i8 *%dest, i8 *%src, i32 *%resptr, i32 *%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 *%resptr
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%unused = call i8 *@strcpy(i8 *%dest, i8 *%src)
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store i32 0, i32 *%storeptr
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ret i32 %res
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}
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