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. 8 define i8 addrspace(1)* @test1(i64 %arg, i8 addrspace(1)* %addr) gc "statepoint-example" { 9 ; CHECK: No illegal uses found by SafepointIRVerifier in: test1 10 entry: 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 5, i32 0, i32 -1, 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. 18 define 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 5, i32 0, i32 -1, 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. 29 define 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! 32 entry: 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 5, i32 0, i32 -1, 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). 43 define 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! 46 entry: 47 %load_addr.1 = getelementptr i8, i8 addrspace(1)* null, i64 %arg 48 br i1 %cond, label %split, label %join 49 50 split: 51 %load_addr.2 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 30 to i8 addrspace(1)*), i64 %arg 52 br label %join 53 54 join: 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 5, i32 0, i32 -1, 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. 64 define 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 5, i32 0, i32 -1, 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. 75 define 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, i8 addrspace(1)* %base2 , i32 -1, i32 0, i32 0, i32 0) 80 %ptr2.relocated = call i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 7, i32 7) ; base2, base2 81 %cmp = icmp eq i8 addrspace(1)* %load_addr1, %ptr2.relocated 82 ret void 83 } 84 declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...) 85 declare i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token, i32, i32) 86
