derek.holloway
7502bf64a4
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82 lines
2.4 KiB
LLVM
82 lines
2.4 KiB
LLVM
; RUN: opt -passes=rewrite-statepoints-for-gc -S < %s | FileCheck %s
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; A null test of a single value
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define i1 @test(ptr addrspace(1) %p, i1 %rare) gc "statepoint-example" {
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; CHECK-LABEL: @test
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entry:
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%cond = icmp eq ptr addrspace(1) %p, null
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br i1 %rare, label %safepoint, label %continue, !prof !0
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safepoint: ; preds = %entry
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call void @safepoint() [ "deopt"() ]
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br label %continue
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continue: ; preds = %safepoint, %entry
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; CHECK-LABEL: continue:
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; CHECK: phi
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; CHECK-DAG: [ %p.relocated, %safepoint ]
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; CHECK-DAG: [ %p, %entry ]
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; CHECK: %cond = icmp
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; CHECK: br i1 %cond
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; Comparing two pointers
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br i1 %cond, label %taken, label %untaken
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taken: ; preds = %continue
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ret i1 true
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untaken: ; preds = %continue
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ret i1 false
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}
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define i1 @test2(ptr addrspace(1) %p, ptr addrspace(1) %q, i1 %rare) gc "statepoint-example" {
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; CHECK-LABEL: @test2
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entry:
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%cond = icmp eq ptr addrspace(1) %p, %q
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br i1 %rare, label %safepoint, label %continue, !prof !0
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safepoint: ; preds = %entry
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call void @safepoint() [ "deopt"() ]
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br label %continue
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continue: ; preds = %safepoint, %entry
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; CHECK-LABEL: continue:
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; CHECK: phi
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; CHECK-DAG: [ %q.relocated, %safepoint ]
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; CHECK-DAG: [ %q, %entry ]
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; CHECK: phi
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; CHECK-DAG: [ %p.relocated, %safepoint ]
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; CHECK-DAG: [ %p, %entry ]
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; CHECK: %cond = icmp
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; CHECK: br i1 %cond
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; Check that nothing bad happens if already last instruction
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; before terminator
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br i1 %cond, label %taken, label %untaken
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taken: ; preds = %continue
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ret i1 true
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untaken: ; preds = %continue
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ret i1 false
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}
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define i1 @test3(ptr addrspace(1) %p, ptr addrspace(1) %q, i1 %rare) gc "statepoint-example" {
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; CHECK-LABEL: @test3
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; CHECK: gc.statepoint
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; CHECK: %cond = icmp
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; CHECK: br i1 %cond
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entry:
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call void @safepoint() [ "deopt"() ]
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%cond = icmp eq ptr addrspace(1) %p, %q
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br i1 %cond, label %taken, label %untaken
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taken: ; preds = %entry
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ret i1 true
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untaken: ; preds = %entry
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ret i1 false
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}
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declare void @safepoint()
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!0 = !{!"branch_weights", i32 1, i32 10000}
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