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; Test strlen using SRST, i64 version.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i64 @strlen(ptr %src)
declare i64 @strnlen(ptr %src, i64 %len)
; Test strlen with its proper i64 prototype. It would also be valid for
; the uses of %r3 and REG after the LGR to be swapped.
define i64 @f1(i32 %dummy, ptr %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 i64 @strlen(ptr %src)
ret i64 %res
}
; Test strnlen with its proper i64 prototype.
define i64 @f2(i64 %len, ptr %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 i64 @strnlen(ptr %src, i64 %len)
ret i64 %res
}
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