derek.holloway
7502bf64a4
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42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; RUN: llc < %s -mtriple=s390x-ibm-zos | FileCheck %s
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; The current function's return address is in the link register.
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define ptr @rt0() norecurse nounwind readnone {
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; CHECK-LABEL: rt0 DS 0H
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; CHECK: lgr 3,7
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; CHECK-NEXT: b 2(7)
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entry:
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%0 = tail call ptr @llvm.returnaddress(i32 0)
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ret ptr %0
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}
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; Check the caller's return address.
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define ptr @rtcaller() nounwind "backchain" {
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; CHECK-LABEL: rtcaller DS 0H
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; CHECK: stmg 4,7,2048(4)
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; CHECK-NEXT: lg 1,2048(4)
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; CHECK-NEXT: lg 3,24(1)
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; CHECK-NEXT: lmg 4,7,2048(4)
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; CHECK-NEXT: b 2(7)
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entry:
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%0 = tail call ptr @llvm.returnaddress(i32 1)
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ret ptr %0
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}
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; Check the caller's caller's return address.
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define ptr @rtcallercaller() nounwind "backchain" {
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; CHECK-LABEL: rtcallercaller DS 0H
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; CHECK: stmg 4,7,2048(4)
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; CHECK-NEXT: lg 1,2048(4)
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; CHECK-NEXT: lg 1,0(1)
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; CHECK-NEXT: lg 3,24(1)
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; CHECK-NEXT: lmg 4,7,2048(4)
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; CHECK-NEXT: b 2(7)
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entry:
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%0 = tail call ptr @llvm.returnaddress(i32 2)
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ret ptr %0
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}
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declare ptr @llvm.returnaddress(i32) nounwind readnone
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