derek.holloway
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77 lines
1.8 KiB
LLVM
77 lines
1.8 KiB
LLVM
; RUN: opt < %s -S -passes=place-safepoints | FileCheck %s
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; Do we insert a simple entry safepoint?
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define void @test_entry() gc "statepoint-example" {
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; CHECK-LABEL: @test_entry
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entry:
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; CHECK-LABEL: entry
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; CHECK: call void @do_safepoint
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ret void
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}
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; On a non-gc function, we should NOT get an entry safepoint
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define void @test_negative() {
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; CHECK-LABEL: @test_negative
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entry:
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; CHECK-NOT: do_safepoint
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ret void
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}
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; Do we insert a backedge safepoint in a statically
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; infinite loop?
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define void @test_backedge() gc "statepoint-example" {
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; CHECK-LABEL: test_backedge
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entry:
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; CHECK-LABEL: entry
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; This statepoint is technically not required, but we don't exploit that yet.
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; CHECK: call void @do_safepoint
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br label %other
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; CHECK-LABEL: other
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; CHECK: call void @do_safepoint
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other:
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br label %other
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}
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; Check that we remove an unreachable block rather than trying
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; to insert a backedge safepoint
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define void @test_unreachable() gc "statepoint-example" {
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; CHECK-LABEL: test_unreachable
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entry:
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; CHECK-LABEL: entry
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; CHECK: call void @do_safepoint
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ret void
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; CHECK-NOT: other
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; CHECK-NOT: do_safepoint
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other:
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br label %other
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}
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declare void @foo()
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declare zeroext i1 @i1_return_i1(i1)
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define i1 @test_call_with_result() gc "statepoint-example" {
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; CHECK-LABEL: test_call_with_result
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; This is checking that a statepoint_poll is inserted for a function
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; that takes 1 argument.
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; CHECK: call void @do_safepoint
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entry:
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%call1 = tail call i1 (i1) @i1_return_i1(i1 false)
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ret i1 %call1
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}
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; This function is inlined when inserting a poll. To avoid recursive
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; issues, make sure we don't place safepoints in it.
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declare void @do_safepoint()
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define void @gc.safepoint_poll() {
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; CHECK-LABEL: gc.safepoint_poll
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; CHECK-LABEL: entry
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; CHECK-NEXT: do_safepoint
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; CHECK-NEXT: ret void
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entry:
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call void @do_safepoint()
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ret void
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}
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