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; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
; Uses InstCombine with DataLayout to propagate dereferenceable
; attribute via gc.relocate: if the derived ptr is dereferenceable(N),
; then the return attribute of gc.relocate is dereferenceable(N).
declare zeroext i1 @return_i1()
declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()*, i32, i32, ...)
declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32)
define i32 addrspace(1)* @deref(i32 addrspace(1)* dereferenceable(8) %dparam) gc "statepoint-example" {
; Checks that a dereferenceabler pointer
; CHECK-LABEL: @deref
; CHECK: call dereferenceable(8)
entry:
%load = load i32, i32 addrspace(1)* %dparam
%tok = tail call i32 (i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 addrspace(1)* %dparam)
%relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 4, i32 4)
ret i32 addrspace(1)* %relocate
}
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