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c60ad3e1fe
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
24 lines
1.0 KiB
LLVM
24 lines
1.0 KiB
LLVM
; RUN: not llvm-as -disable-output <%s 2>&1 | FileCheck %s
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; This is to verify that gc_relocate must return a pointer with the same
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; address space with the relocated value.
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; CHECK: gc.relocate: relocating a pointer shouldn't change its address space
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; CHECK-NEXT: %obj.relocated = call coldcc i8* @llvm.experimental.gc.relocate.p0i8(token %safepoint_token, i32 7, i32 7) ;
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declare void @foo()
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; Function Attrs: nounwind
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...) #0
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define void @test1(i64 addrspace(1)* %obj) gc "statepoint-example" {
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entry:
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%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, i64 addrspace(1)* %obj)
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%obj.relocated = call coldcc i8* @llvm.experimental.gc.relocate.p0i8(token %safepoint_token, i32 7, i32 7) ; (%obj, %obj)
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ret void
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}
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; Function Attrs: nounwind
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declare i8* @llvm.experimental.gc.relocate.p0i8(token, i32, i32) #0
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attributes #0 = { nounwind }
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