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https://github.com/c64scene-ar/llvm-6502.git
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2eace6ebc5
a) add gc attribute b) remove unused param git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228612 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
1.5 KiB
LLVM
72 lines
1.5 KiB
LLVM
; RUN: opt %s -S -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: statepoint
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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: statepoint
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br label %other
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; CHECK-LABEL: other
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; CHECK: statepoint
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other:
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call void undef()
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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: statepoint
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ret void
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; CHECK-NOT: other
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; CHECK-NOT: statepoint
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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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; Do we turn a call into it's own statepoint
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define void @test_simple_call() gc "statepoint-example" {
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; CHECK-LABEL: test_simple_call
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entry:
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br label %other
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other:
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; CHECK-LABEL: other
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; CHECK: statepoint
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call void @foo()
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ret void
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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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