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[Inline] Precommit tests for dead calls and willreturn.

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precommit tests for D94106.
This commit is contained in:
Florian Hahn 2021-01-05 18:46:17 +00:00
parent 095e245e16
commit d6c763e098
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1 changed files with 53 additions and 0 deletions
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llvm/test/Transforms/Inline/dead-calls-willreturn.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -inline -S %s | FileCheck %s
; readnone but may not return according to attributes.
define void @readnone_may_not_return() nounwind readnone ssp {
; CHECK-LABEL: @readnone_may_not_return(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK: while.body:
; CHECK-NEXT: br label [[WHILE_BODY]]
;
entry:
br label %while.body
while.body:
br label %while.body
}
; readnone and guaranteed to return according to attributes.
define void @readnone_willreturn() willreturn nounwind readnone ssp {
; CHECK-LABEL: @readnone_willreturn(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret void
;
entry:
ret void
}
; Make sure the call to @readnone is not treated as dead, because it is not
; marked as willreturn.
define void @caller_may_not_return() ssp {
; CHECK-LABEL: @caller_may_not_return(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret void
;
entry:
call void @readnone_may_not_return()
call void @readnone_willreturn()
ret void
}
; @caller_willreturn is marked as willreturn, so all called functions also must
; return. All calls are dead.
define void @caller_willreturn() ssp willreturn {
; CHECK-LABEL: @caller_willreturn(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret void
;
entry:
call void @readnone_may_not_return()
call void @readnone_willreturn()
ret void
}