mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
2f21b887d3
Original Patch and summary by Philip Reames. RewriteStatepointsForGC tries to rewrite a function in a manner where the optimizer can't end up using a pointer value after it might have been relocated by a safepoint. This pass checks the invariant that RSForGC is supposed to establish and that (if we constructed semantics correctly) later passes must preserve. This has been a really useful diagnostic tool when initially developing the rewriting scheme and has found numerous bugs. Differential Revision: https://reviews.llvm.org/D15940 Reviewed by: swaroop.sridhar, mjacob Subscribers: llvm-commits llvm-svn: 307112
71 lines
3.7 KiB
LLVM
71 lines
3.7 KiB
LLVM
; RUN: opt -safepoint-ir-verifier-print-only -verify-safepoint-ir -S %s 2>&1 | FileCheck %s
|
|
|
|
define i8 addrspace(1)* @test1(i64 %arg) gc "statepoint-example" {
|
|
; CHECK: No illegal uses found by SafepointIRVerifier in: test1
|
|
entry:
|
|
%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)
|
|
ret i8 addrspace(1)* null
|
|
}
|
|
|
|
define i8 addrspace(1)* @test2(i64 %arg) gc "statepoint-example" {
|
|
; CHECK: No illegal uses found by SafepointIRVerifier in: test2
|
|
entry:
|
|
%load_addr = getelementptr i8, i8 addrspace(1)* inttoptr (i64 15 to i8 addrspace(1)*), i64 %arg
|
|
%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)
|
|
ret i8 addrspace(1)* %load_addr
|
|
}
|
|
|
|
define i8 addrspace(1)* @test3(i64 %arg) gc "statepoint-example" {
|
|
; CHECK: No illegal uses found by SafepointIRVerifier in: test3
|
|
entry:
|
|
%load_addr = getelementptr i32, i32 addrspace(1)* inttoptr (i64 15 to i32 addrspace(1)*), i64 %arg
|
|
%load_addr.cast = bitcast i32 addrspace(1)* %load_addr to i8 addrspace(1)*
|
|
%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)
|
|
ret i8 addrspace(1)* %load_addr.cast
|
|
}
|
|
|
|
define i8 addrspace(1)* @test4(i64 %arg, i1 %cond) gc "statepoint-example" {
|
|
; CHECK: No illegal uses found by SafepointIRVerifier in: test4
|
|
entry:
|
|
%load_addr.1 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 15 to i8 addrspace(1)*), i64 %arg
|
|
br i1 %cond, label %split, label %join
|
|
|
|
split:
|
|
%load_addr.2 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 30 to i8 addrspace(1)*), i64 %arg
|
|
br label %join
|
|
|
|
join:
|
|
%load_addr = phi i8 addrspace(1)* [%load_addr.1, %entry], [%load_addr.2, %split]
|
|
%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)
|
|
ret i8 addrspace(1)* %load_addr
|
|
}
|
|
|
|
define i8 addrspace(1)* @test5(i64 %arg, i1 %cond) gc "statepoint-example" {
|
|
; CHECK: No illegal uses found by SafepointIRVerifier in: test5
|
|
entry:
|
|
%load_addr.1 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 15 to i8 addrspace(1)*), i64 %arg
|
|
%load_addr.2 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 30 to i8 addrspace(1)*), i64 %arg
|
|
%load_addr = select i1 %cond, i8 addrspace(1)* %load_addr.1, i8 addrspace(1)* %load_addr.2
|
|
%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)
|
|
ret i8 addrspace(1)* %load_addr
|
|
}
|
|
|
|
define i8 addrspace(1)* @test6(i64 %arg, i1 %cond, i8 addrspace(1)* %base) gc "statepoint-example" {
|
|
; CHECK-LABEL: Verifying gc pointers in function: test6
|
|
; CHECK: Illegal use of unrelocated value found!
|
|
entry:
|
|
%load_addr.1 = getelementptr i8, i8 addrspace(1)* %base, i64 %arg
|
|
br i1 %cond, label %split, label %join
|
|
|
|
split:
|
|
%load_addr.2 = getelementptr i8, i8 addrspace(1)* inttoptr (i64 30 to i8 addrspace(1)*), i64 %arg
|
|
br label %join
|
|
|
|
join:
|
|
%load_addr = phi i8 addrspace(1)* [%load_addr.1, %entry], [%load_addr.2, %split]
|
|
%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)
|
|
ret i8 addrspace(1)* %load_addr
|
|
}
|
|
|
|
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
|