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; RUN: opt -rewrite-statepoints-for-gc -S < %s | FileCheck %s
; RUN: opt -passes=rewrite-statepoints-for-gc -S < %s | FileCheck %s
; A null test of a single value
define i1 @test(i8 addrspace(1)* %p, i1 %rare) gc "statepoint-example" {
; CHECK-LABEL: @test
entry:
%cond = icmp eq i8 addrspace(1)* %p, null
br i1 %rare, label %safepoint, label %continue, !prof !0
safepoint: ; preds = %entry
call void @safepoint() [ "deopt"() ]
br label %continue
continue: ; preds = %safepoint, %entry
; CHECK-LABEL: continue:
; CHECK: phi
; CHECK-DAG: [ %p.relocated, %safepoint ]
; CHECK-DAG: [ %p, %entry ]
; CHECK: %cond = icmp
; CHECK: br i1 %cond
; Comparing two pointers
br i1 %cond, label %taken, label %untaken
taken: ; preds = %continue
ret i1 true
untaken: ; preds = %continue
ret i1 false
}
define i1 @test2(i8 addrspace(1)* %p, i8 addrspace(1)* %q, i1 %rare) gc "statepoint-example" {
; CHECK-LABEL: @test2
entry:
%cond = icmp eq i8 addrspace(1)* %p, %q
br i1 %rare, label %safepoint, label %continue, !prof !0
safepoint: ; preds = %entry
call void @safepoint() [ "deopt"() ]
br label %continue
continue: ; preds = %safepoint, %entry
; CHECK-LABEL: continue:
; CHECK: phi
; CHECK-DAG: [ %q.relocated, %safepoint ]
; CHECK-DAG: [ %q, %entry ]
; CHECK: phi
; CHECK-DAG: [ %p.relocated, %safepoint ]
; CHECK-DAG: [ %p, %entry ]
; CHECK: %cond = icmp
; CHECK: br i1 %cond
; Sanity check that nothing bad happens if already last instruction
; before terminator
br i1 %cond, label %taken, label %untaken
taken: ; preds = %continue
ret i1 true
untaken: ; preds = %continue
ret i1 false
}
define i1 @test3(i8 addrspace(1)* %p, i8 addrspace(1)* %q, i1 %rare) gc "statepoint-example" {
; CHECK-LABEL: @test3
; CHECK: gc.statepoint
; CHECK: %cond = icmp
; CHECK: br i1 %cond
entry:
call void @safepoint() [ "deopt"() ]
%cond = icmp eq i8 addrspace(1)* %p, %q
br i1 %cond, label %taken, label %untaken
taken: ; preds = %entry
ret i1 true
untaken: ; preds = %entry
ret i1 false
}
declare void @safepoint()
!0 = !{!"branch_weights", i32 1, i32 10000}
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