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; RUN: opt -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:
call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @safepoint, i32 0, i32 0, i32 0, i32 0)
br label %continue
continue:
; CHECK-LABEL: continue:
; CHECK: phi
; CHECK-DAG: [ %p.relocated, %safepoint ]
; CHECK-DAG: [ %p, %entry ]
; CHECK: %cond = icmp
; CHECK: br i1 %cond
br i1 %cond, label %taken, label %untaken
taken:
ret i1 true
untaken:
ret i1 false
}
; Comparing two pointers
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:
call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @safepoint, i32 0, i32 0, i32 0, i32 0)
br label %continue
continue:
; 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
br i1 %cond, label %taken, label %untaken
taken:
ret i1 true
untaken:
ret i1 false
}
; Sanity check that nothing bad happens if already last instruction
; before terminator
define i1 @test3(i8 addrspace(1)* %p, i8 addrspace(1)* %q, i1 %rare)
gc "statepoint-example" {
; CHECK-LABEL: @test3
entry:
call i32 (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @safepoint, i32 0, i32 0, i32 0, i32 0)
; CHECK: gc.statepoint
; CHECK: %cond = icmp
; CHECK: br i1 %cond
%cond = icmp eq i8 addrspace(1)* %p, %q
br i1 %cond, label %taken, label %untaken
taken:
ret i1 true
untaken:
ret i1 false
}
declare void @safepoint()
declare i32 @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
!0 = !{!"branch_weights", i32 1, i32 10000}
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