| ; 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(i64, i32, 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 (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) |
| %relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7) |
| ret i32 addrspace(1)* %relocate |
| } |