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[dev.ssa] cmd/compile/internal/ssa: Complete 64-bit shifts

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Implement correct Go shifts.

Allow multi-line rewrite rules.

Fix offset & alignment in stack alloc.

Change-Id: I0ae9e522c83df9205bbe4ab94bc0e43d16dace58
Reviewed-on: https://go-review.googlesource.com/10891
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Keith Randall 2015-06-10 10:39:57 -07:00
parent 290d8fc14a
commit 6f1884757f
12 changed files with 722 additions and 63 deletions
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42
src/cmd/compile/internal/ssa/shift_test.go Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ssa
import (
"testing"
)
func TestShiftConstAMD64(t *testing.T) {
c := NewConfig("amd64", DummyFrontend{})
fun := makeConstShiftFunc(c, 18, OpLsh, TypeUInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SHLQconst: 1, OpAMD64CMPQconst: 0, OpAMD64ANDQconst: 0})
fun = makeConstShiftFunc(c, 66, OpLsh, TypeUInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SHLQconst: 0, OpAMD64CMPQconst: 0, OpAMD64ANDQconst: 0})
fun = makeConstShiftFunc(c, 18, OpRsh, TypeUInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SHRQconst: 1, OpAMD64CMPQconst: 0, OpAMD64ANDQconst: 0})
fun = makeConstShiftFunc(c, 66, OpRsh, TypeUInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SHRQconst: 0, OpAMD64CMPQconst: 0, OpAMD64ANDQconst: 0})
fun = makeConstShiftFunc(c, 18, OpRsh, TypeInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SARQconst: 1, OpAMD64CMPQconst: 0})
fun = makeConstShiftFunc(c, 66, OpRsh, TypeInt64)
checkOpcodeCounts(t, fun.f, map[Op]int{OpAMD64SARQconst: 1, OpAMD64CMPQconst: 0})
}
func makeConstShiftFunc(c *Config, amount int64, op Op, typ Type) fun {
ptyp := &TypeImpl{Size_: 8, Ptr: true, Name: "ptr"}
fun := Fun(c, "entry",
Bloc("entry",
Valu("mem", OpArg, TypeMem, ".mem"),
Valu("FP", OpFP, TypeUInt64, nil),
Valu("argptr", OpOffPtr, ptyp, int64(8), "FP"),
Valu("resptr", OpOffPtr, ptyp, int64(16), "FP"),
Valu("load", OpLoad, typ, nil, "argptr", "mem"),
Valu("c", OpConst, TypeUInt64, amount),
Valu("shift", op, typ, nil, "load", "c"),
Valu("store", OpStore, TypeMem, nil, "resptr", "shift", "mem"),
Exit("store")))
Compile(fun.f)
return fun
}