forked from OSchip/llvm-project
22 lines
1.1 KiB
LLVM
22 lines
1.1 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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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"
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; Uses InstCombine with DataLayout to propagate dereferenceable
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; attribute via gc.relocate: if the derived ptr is dereferenceable(N),
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; then the return attribute of gc.relocate is dereferenceable(N).
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declare zeroext i1 @return_i1()
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declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...)
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declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32)
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define i32 addrspace(1)* @deref(i32 addrspace(1)* dereferenceable(8) %dparam) gc "statepoint-example" {
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; Checks that a dereferenceabler pointer
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; CHECK-LABEL: @deref
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; CHECK: call dereferenceable(8)
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entry:
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%load = load i32, i32 addrspace(1)* %dparam
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%tok = tail call i32 (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* %dparam)
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%relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7)
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ret i32 addrspace(1)* %relocate
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}
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