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Previously, this pass ran over every function in the Module if added to the pass order. With this change, it runs only over those with a GC attribute where the GC explicitly opts in. A GC can also choose which of entry safepoint polls, backedge safepoint polls, and call safepoints it wants. I hope to get these exposed as checks on the GCStrategy at some point, but for now, the checks are manual string comparisons. llvm-svn: 230097
32 lines
704 B
LLVM
32 lines
704 B
LLVM
; If there's a call in the loop which dominates the backedge, we
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; don't need a safepoint poll (since the callee must contain a
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; poll test).
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;; RUN: opt %s -place-safepoints -S | FileCheck %s
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declare void @foo()
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define void @test1() gc "statepoint-example" {
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; CHECK-LABEL: test1
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entry:
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; CHECK-LABEL: entry
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; CHECK: statepoint
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br label %loop
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loop:
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; CHECK-LABEL: loop
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; CHECK: @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo
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; CHECK-NOT: statepoint
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call void @foo()
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br label %loop
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}
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; This function is inlined when inserting a poll.
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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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entry:
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call void @do_safepoint()
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ret void
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}
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