1; RUN: opt -safepoint-ir-verifier-print-only -verify-safepoint-ir -S %s 2>&1 | FileCheck %s 2 3; In some cases, it is valid to have unrelocated pointers used as compare 4; operands. Make sure the verifier knows to spot these exceptions. 5 6 7; comparison against null. 8define i8 addrspace(1)* @test1(i64 %arg, i8 addrspace(1)* %addr) gc "statepoint-example" { 9; CHECK: No illegal uses found by SafepointIRVerifier in: test1 10entry: 11 %load_addr = getelementptr i8, i8 addrspace(1)* %addr, i64 %arg 12 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) 13 %cmp = icmp eq i8 addrspace(1)* %load_addr, null 14 ret i8 addrspace(1)* null 15} 16 17; comparison against exclusively derived null. 18define void @test2(i64 %arg, i1 %cond, i8 addrspace(1)* %addr) gc "statepoint-example" { 19; CHECK: No illegal uses found by SafepointIRVerifier in: test2 20 %load_addr = getelementptr i8, i8 addrspace(1)* null, i64 %arg 21 %load_addr_sel = select i1 %cond, i8 addrspace(1)* null, i8 addrspace(1)* %load_addr 22 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) 23 %cmp = icmp eq i8 addrspace(1)* %addr, %load_addr_sel 24 ret void 25} 26 27; comparison against a constant non-null pointer. This is unrelocated use, since 28; that pointer bits may mean something in a VM. 29define void @test3(i64 %arg, i32 addrspace(1)* %addr) gc "statepoint-example" { 30; CHECK-LABEL: Verifying gc pointers in function: test3 31; CHECK: Illegal use of unrelocated value found! 32entry: 33 %load_addr = getelementptr i32, i32 addrspace(1)* %addr, i64 %arg 34 %load_addr_const = getelementptr i32, i32 addrspace(1)* inttoptr (i64 15 to i32 addrspace(1)*), i64 %arg 35 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) 36 %cmp = icmp eq i32 addrspace(1)* %load_addr, %load_addr_const 37 ret void 38} 39 40; comparison against a derived pointer that is *not* exclusively derived from 41; null. An unrelocated use since the derived pointer could be from the constant 42; non-null pointer (load_addr.2). 43define void @test4(i64 %arg, i1 %cond, i8 addrspace(1)* %base) gc "statepoint-example" { 44; CHECK-LABEL: Verifying gc pointers in function: test4 45; CHECK: Illegal use of unrelocated value found! 46entry: 47 %load_addr.1 = getelementptr i8, i8 addrspace(1)* null, i64 %arg 48 br i1 %cond, label %split, label %join 49 50split: 51 %load_addr.2 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 30 to i8 addrspace(1)*), i64 %arg 52 br label %join 53 54join: 55 %load_addr = phi i8 addrspace(1)* [%load_addr.1, %entry], [%load_addr.2, %split] 56 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) 57 %cmp = icmp eq i8 addrspace(1)* %load_addr, %base 58 ret void 59} 60 61; comparison between 2 unrelocated base pointers. 62; Since the cmp can be reordered legally before the safepoint, these are correct 63; unrelocated uses of the pointers. 64define void @test5(i64 %arg, i8 addrspace(1)* %base1, i8 addrspace(1)* %base2) gc "statepoint-example" { 65; CHECK: No illegal uses found by SafepointIRVerifier in: test5 66 %load_addr1 = getelementptr i8, i8 addrspace(1)* %base1, i64 %arg 67 %load_addr2 = getelementptr i8, i8 addrspace(1)* %base2, i64 %arg 68 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) 69 %cmp = icmp eq i8 addrspace(1)* %load_addr1, %load_addr2 70 ret void 71} 72 73; comparison between a relocated and an unrelocated pointer. 74; this is invalid use of the unrelocated pointer. 75define void @test6(i64 %arg, i8 addrspace(1)* %base1, i8 addrspace(1)* %base2) gc "statepoint-example" { 76; CHECK-LABEL: Verifying gc pointers in function: test6 77; CHECK: Illegal use of unrelocated value found! 78 %load_addr1 = getelementptr i8, i8 addrspace(1)* %base1, i64 %arg 79 %safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* undef, i32 0, i32 0, i32 0, i32 0) ["gc-live"(i8 addrspace(1)* %base2)] 80 %ptr2.relocated = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 0, i32 0) ; base2, base2 81 %cmp = icmp eq i8 addrspace(1)* %load_addr1, %ptr2.relocated 82 ret void 83} 84declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...) 85declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32) 86