derek.holloway
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40 lines
1009 B
LLVM
40 lines
1009 B
LLVM
; Test support for the llvm.returnaddress intrinsic with packed-stack.
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; The current function's return address is in the link register.
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attributes #0 = { nounwind "packed-stack" "backchain" "use-soft-float"="true" }
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define ptr @rt0() #0 {
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entry:
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; CHECK-LABEL: rt0:
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; CHECK: lgr %r2, %r14
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; CHECK: br %r14
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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() #0 {
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entry:
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; CHECK-LABEL: rtcaller:
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; CHECK: lg %r1, 152(%r15)
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; CHECK lg %r2, 136(%r1)
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; CHECK: br %r14
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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() #0 {
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entry:
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; CHECK-LABEL: rtcallercaller:
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; CHECK: lg %r1, 152(%r15)
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; CHECK: lg %r1, 152(%r1)
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; CHECK lg %r2, 136(%r1)
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; CHECK: br %r14
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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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