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1b3aa514d1
Summary: This patch changes call graph analysis to recognize callback call sites and add an artificial 'reference' call record from the broker function caller to the callback function in the call graph. A presence of such reference enforces bottom-up traversal order for callback functions in CG SCC pass manager because callback function logically becomes a callee of the broker function caller. Reviewers: jdoerfert, hfinkel, sstefan1, baziotis Reviewed By: jdoerfert Subscribers: hiraditya, kuter, sstefan1, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D82572
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 0) ["gc-live"(i8 addrspace(1)* %arg, i64 addrspace(1)* %cast, i8 addrspace(1)* %arg, i8 addrspace(1)* %arg), "deopt" (i32 0, i32 0, i32 0, i32 10, i32 0)]
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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<None> 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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