derek.holloway
7502bf64a4
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47 lines
1.1 KiB
LLVM
47 lines
1.1 KiB
LLVM
;; A very basic test to make sure that splitting the backedge keeps working
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;; RUN: opt < %s -passes=place-safepoints -spp-split-backedge=1 -S | FileCheck %s
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define void @test(i32, i1 %cond) gc "statepoint-example" {
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; CHECK-LABEL: @test
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; CHECK-LABEL: loop.loop_crit_edge
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; CHECK: call void @do_safepoint
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; CHECK-NEXT: br label %loop
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entry:
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br label %loop
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loop:
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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}
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; Test for the case where a single conditional branch jumps to two
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; different loop header blocks. Since we're currently using LoopSimplfy
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; this doesn't hit the interesting case, but once we remove that, we need
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; to be sure this keeps working.
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define void @test2(i32, i1 %cond) gc "statepoint-example" {
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; CHECK-LABEL: @test2
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; CHECK-LABEL: loop2.loop2_crit_edge:
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; CHECK: call void @do_safepoint
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; CHECK-NEXT: br label %loop2
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; CHECK-LABEL: loop2.loop_crit_edge:
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; CHECK: call void @do_safepoint
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; CHECK-NEXT: br label %loop
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entry:
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br label %loop
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loop:
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br label %loop2
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loop2:
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br i1 %cond, label %loop, label %loop2
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}
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declare void @do_safepoint()
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define void @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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