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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
33 lines
1.4 KiB
LLVM
33 lines
1.4 KiB
LLVM
; RUN: opt -S -print-callgraph -disable-output < %s 2>&1 | FileCheck %s
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declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...)
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declare token @llvm.experimental.gc.statepoint.p0f_isVoidf(i64, i32, void ()*, i32, i32, ...)
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define private void @f() {
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ret void
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}
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define void @calls_statepoint(i8 addrspace(1)* %arg) gc "statepoint-example" {
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entry:
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%cast = bitcast i8 addrspace(1)* %arg to i64 addrspace(1)*
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%safepoint_token = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 0, i32 0, void ()* @f, i32 0, i32 0, i32 0, i32 5, i32 0, i32 0, i32 0, i32 10, i32 0, i8 addrspace(1)* %arg, i64 addrspace(1)* %cast, i8 addrspace(1)* %arg, i8 addrspace(1)* %arg)
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ret void
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}
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define void @calls_patchpoint() {
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entry:
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%c = bitcast void()* @f to i8*
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tail call void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 1, i32 15, i8* %c, i32 0, i16 65535, i16 -1, i32 65536, i32 2000000000, i32 2147483647, i32 -1, i32 4294967295, i32 4294967296, i64 2147483648, i64 4294967295, i64 4294967296, i64 -1)
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ret void
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}
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; CHECK: Call graph node <<null function>>
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; CHECK: CS<0x0> calls function 'f'
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; CHECK: Call graph node for function: 'calls_patchpoint'
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; CHECK-NEXT: CS<[[addr_1:[^>]+]]> calls external node
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; CHECK: Call graph node for function: 'calls_statepoint'
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; CHECK-NEXT: CS<[[addr_0:[^>]+]]> calls external node
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