d71999ef1b
Summary: This patch changes gc.statepoint intrinsic's return type to token type instead of i32 type. Using token types could prevent LLVM to merge different gc.statepoint nodes into PHI nodes and cause further problems with gc relocations. The patch also changes the way on how gc.relocate and gc.result look for their corresponding gc.statepoint on unwind path. The current implementation uses the selector value extracted from a { i8*, i32 } landingpad as a hook to find the gc.statepoint, while the patch directly uses a token type landingpad (http://reviews.llvm.org/D15405) to find the gc.statepoint.
Reviewers: sanjoy, JosephTremoulet, pgavlin, igor-laevsky, mjacob
Subscribers: reames, mjacob, sanjoy, llvm-commits
Differential Revision: http://reviews.llvm.org/D15662
llvm-svn: 256443
21 lines
1.2 KiB
LLVM
21 lines
1.2 KiB
LLVM
; RUN: opt %s -rewrite-statepoints-for-gc -S 2>&1 | FileCheck %s
|
|
; This test is to verify gc.relocate can handle pointer to vector of
|
|
; pointers (<2 x i32 addrspace(1)*> addrspace(1)* in this case).
|
|
; The old scheme to create a gc.relocate of <2 x i32 addrspace(1)*> addrspace(1)*
|
|
; type will fail because llvm does not support mangling vector of pointers.
|
|
; The new scheme will create all gc.relocate to i8 addrspace(1)* type and
|
|
; then bitcast to the correct type.
|
|
|
|
declare void @foo()
|
|
declare void @use(...)
|
|
declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
|
|
|
|
define void @test1(<2 x i32 addrspace(1)*> addrspace(1)* %obj) gc "statepoint-example" {
|
|
entry:
|
|
%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @foo, i32 0, i32 0, i32 0, i32 0)
|
|
; CHECK: %obj.relocated = call coldcc i8 addrspace(1)* @llvm.experimental.gc.relocate.p1i8(token %safepoint_token, i32 7, i32 7)
|
|
; CHECK-NEXT: %obj.relocated.casted = bitcast i8 addrspace(1)* %obj.relocated to <2 x i32 addrspace(1)*> addrspace(1)*
|
|
call void (...) @use(<2 x i32 addrspace(1)*> addrspace(1)* %obj)
|
|
ret void
|
|
}
|