1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 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" 3 4 ; Uses InstCombine with DataLayout to propagate dereferenceable 5 ; attribute via gc.relocate: if the derived ptr is dereferenceable(N), 6 ; then the return attribute of gc.relocate is dereferenceable(N). 7 8 declare zeroext i1 @return_i1() 9 declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...) 10 declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32) 11 12 define i32 addrspace(1)* @deref(i32 addrspace(1)* dereferenceable(8) %dparam) gc "statepoint-example" { 13 ; Checks that a dereferenceabler pointer 14 ; CHECK-LABEL: @deref 15 ; CHECK: call dereferenceable(8) 16 entry: 17 %load = load i32, i32 addrspace(1)* %dparam 18 %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) 19 %relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7) 20 ret i32 addrspace(1)* %relocate 21 } 22 23 define i32 @explicit_nonnull(i32 addrspace(1)* nonnull %dparam) gc "statepoint-example" { 24 ; Checks that a nonnull pointer 25 ; CHECK-LABEL: @explicit_nonnull 26 ; CHECK: ret i32 1 27 entry: 28 %load = load i32, i32 addrspace(1)* %dparam 29 %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) 30 %relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7) 31 %cmp = icmp eq i32 addrspace(1)* %relocate, null 32 %ret_val = select i1 %cmp, i32 0, i32 1 33 ret i32 %ret_val 34 } 35 36 define i32 @implicit_nonnull(i32 addrspace(1)* %dparam) gc "statepoint-example" { 37 ; Checks that a nonnull pointer 38 ; CHECK-LABEL: @implicit_nonnull 39 ; CHECK: ret i32 1 40 entry: 41 %cond = icmp eq i32 addrspace(1)* %dparam, null 42 br i1 %cond, label %no_gc, label %gc 43 gc: 44 %load = load i32, i32 addrspace(1)* %dparam 45 %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) 46 %relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7) 47 %cmp = icmp eq i32 addrspace(1)* %relocate, null 48 %ret_val = select i1 %cmp, i32 0, i32 1 49 ret i32 %ret_val 50 no_gc: 51 unreachable 52 } 53
