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2cdb7f118a
Suggested by mdempsky in CL 38232. This allows us to use the Frontend field to associate frontend state and information with a function. See the following CL in the series for examples. This is a giant CL, but it is almost entirely routine refactoring. The ssa test API is starting to feel a bit unwieldy. I will clean it up separately, once the dust has settled. Passes toolstash -cmp. Updates #15756 Change-Id: I71c573bd96ff7251935fce1391b06b1f133c3caf Reviewed-on: https://go-review.googlesource.com/38327 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
53 lines
1.8 KiB
Go
53 lines
1.8 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ssa
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import "testing"
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func TestWriteBarrierStoreOrder(t *testing.T) {
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// Make sure writebarrier phase works even StoreWB ops are not in dependency order
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c := testConfig(t)
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ptrType := &TypeImpl{Size_: 8, Ptr: true, Name: "testptr"} // dummy for testing
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fun := Fun(c, DummyFrontend{t}, "entry",
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Bloc("entry",
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Valu("start", OpInitMem, TypeMem, 0, nil),
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Valu("sb", OpSB, TypeInvalid, 0, nil),
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Valu("sp", OpSP, TypeInvalid, 0, nil),
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Valu("v", OpConstNil, ptrType, 0, nil),
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Valu("addr1", OpAddr, ptrType, 0, nil, "sb"),
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Valu("wb2", OpStore, TypeMem, 0, ptrType, "addr1", "v", "wb1"),
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Valu("wb1", OpStore, TypeMem, 0, ptrType, "addr1", "v", "start"), // wb1 and wb2 are out of order
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Goto("exit")),
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Bloc("exit",
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Exit("wb2")))
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CheckFunc(fun.f)
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writebarrier(fun.f)
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CheckFunc(fun.f)
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}
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func TestWriteBarrierPhi(t *testing.T) {
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// Make sure writebarrier phase works for single-block loop, where
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// a Phi op takes the store in the same block as argument.
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// See issue #19067.
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c := testConfig(t)
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ptrType := &TypeImpl{Size_: 8, Ptr: true, Name: "testptr"} // dummy for testing
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fun := Fun(c, DummyFrontend{t}, "entry",
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Bloc("entry",
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Valu("start", OpInitMem, TypeMem, 0, nil),
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Valu("sb", OpSB, TypeInvalid, 0, nil),
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Valu("sp", OpSP, TypeInvalid, 0, nil),
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Goto("loop")),
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Bloc("loop",
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Valu("phi", OpPhi, TypeMem, 0, nil, "start", "wb"),
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Valu("v", OpConstNil, ptrType, 0, nil),
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Valu("addr", OpAddr, ptrType, 0, nil, "sb"),
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Valu("wb", OpStore, TypeMem, 0, ptrType, "addr", "v", "phi"), // has write barrier
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Goto("loop")))
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CheckFunc(fun.f)
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writebarrier(fun.f)
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CheckFunc(fun.f)
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}
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