1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package ssa 6 7 import ( 8 "cmd/compile/internal/types" 9 "testing" 10 ) 11 12 type tstAux struct { 13 s string 14 } 15 16 // This tests for a bug found when partitioning, but not sorting by the Aux value. 17 func TestCSEAuxPartitionBug(t *testing.T) { 18 c := testConfig(t) 19 arg1Aux := &tstAux{"arg1-aux"} 20 arg2Aux := &tstAux{"arg2-aux"} 21 arg3Aux := &tstAux{"arg3-aux"} 22 23 // construct lots of values with args that have aux values and place 24 // them in an order that triggers the bug 25 fun := c.Fun("entry", 26 Bloc("entry", 27 Valu("start", OpInitMem, types.TypeMem, 0, nil), 28 Valu("sp", OpSP, c.config.Types.BytePtr, 0, nil), 29 Valu("r7", OpAdd64, c.config.Types.Int64, 0, nil, "arg3", "arg1"), 30 Valu("r1", OpAdd64, c.config.Types.Int64, 0, nil, "arg1", "arg2"), 31 Valu("arg1", OpArg, c.config.Types.Int64, 0, arg1Aux), 32 Valu("arg2", OpArg, c.config.Types.Int64, 0, arg2Aux), 33 Valu("arg3", OpArg, c.config.Types.Int64, 0, arg3Aux), 34 Valu("r9", OpAdd64, c.config.Types.Int64, 0, nil, "r7", "r8"), 35 Valu("r4", OpAdd64, c.config.Types.Int64, 0, nil, "r1", "r2"), 36 Valu("r8", OpAdd64, c.config.Types.Int64, 0, nil, "arg3", "arg2"), 37 Valu("r2", OpAdd64, c.config.Types.Int64, 0, nil, "arg1", "arg2"), 38 Valu("raddr", OpAddr, c.config.Types.Int64.PtrTo(), 0, nil, "sp"), 39 Valu("raddrdef", OpVarDef, types.TypeMem, 0, nil, "start"), 40 Valu("r6", OpAdd64, c.config.Types.Int64, 0, nil, "r4", "r5"), 41 Valu("r3", OpAdd64, c.config.Types.Int64, 0, nil, "arg1", "arg2"), 42 Valu("r5", OpAdd64, c.config.Types.Int64, 0, nil, "r2", "r3"), 43 Valu("r10", OpAdd64, c.config.Types.Int64, 0, nil, "r6", "r9"), 44 Valu("rstore", OpStore, types.TypeMem, 0, c.config.Types.Int64, "raddr", "r10", "raddrdef"), 45 Goto("exit")), 46 Bloc("exit", 47 Exit("rstore"))) 48 49 CheckFunc(fun.f) 50 cse(fun.f) 51 deadcode(fun.f) 52 CheckFunc(fun.f) 53 54 s1Cnt := 2 55 // r1 == r2 == r3, needs to remove two of this set 56 s2Cnt := 1 57 // r4 == r5, needs to remove one of these 58 for k, v := range fun.values { 59 if v.Op == OpInvalid { 60 switch k { 61 case "r1": 62 fallthrough 63 case "r2": 64 fallthrough 65 case "r3": 66 if s1Cnt == 0 { 67 t.Errorf("cse removed all of r1,r2,r3") 68 } 69 s1Cnt-- 70 71 case "r4": 72 fallthrough 73 case "r5": 74 if s2Cnt == 0 { 75 t.Errorf("cse removed all of r4,r5") 76 } 77 s2Cnt-- 78 default: 79 t.Errorf("cse removed %s, but shouldn't have", k) 80 } 81 } 82 } 83 84 if s1Cnt != 0 || s2Cnt != 0 { 85 t.Errorf("%d values missed during cse", s1Cnt+s2Cnt) 86 } 87 } 88 89 // TestZCSE tests the zero arg cse. 90 func TestZCSE(t *testing.T) { 91 c := testConfig(t) 92 93 fun := c.Fun("entry", 94 Bloc("entry", 95 Valu("start", OpInitMem, types.TypeMem, 0, nil), 96 Valu("sp", OpSP, c.config.Types.BytePtr, 0, nil), 97 Valu("sb1", OpSB, c.config.Types.BytePtr, 0, nil), 98 Valu("sb2", OpSB, c.config.Types.BytePtr, 0, nil), 99 Valu("addr1", OpAddr, c.config.Types.Int64.PtrTo(), 0, nil, "sb1"), 100 Valu("addr2", OpAddr, c.config.Types.Int64.PtrTo(), 0, nil, "sb2"), 101 Valu("a1ld", OpLoad, c.config.Types.Int64, 0, nil, "addr1", "start"), 102 Valu("a2ld", OpLoad, c.config.Types.Int64, 0, nil, "addr2", "start"), 103 Valu("c1", OpConst64, c.config.Types.Int64, 1, nil), 104 Valu("r1", OpAdd64, c.config.Types.Int64, 0, nil, "a1ld", "c1"), 105 Valu("c2", OpConst64, c.config.Types.Int64, 1, nil), 106 Valu("r2", OpAdd64, c.config.Types.Int64, 0, nil, "a2ld", "c2"), 107 Valu("r3", OpAdd64, c.config.Types.Int64, 0, nil, "r1", "r2"), 108 Valu("raddr", OpAddr, c.config.Types.Int64.PtrTo(), 0, nil, "sp"), 109 Valu("raddrdef", OpVarDef, types.TypeMem, 0, nil, "start"), 110 Valu("rstore", OpStore, types.TypeMem, 0, c.config.Types.Int64, "raddr", "r3", "raddrdef"), 111 Goto("exit")), 112 Bloc("exit", 113 Exit("rstore"))) 114 115 CheckFunc(fun.f) 116 zcse(fun.f) 117 deadcode(fun.f) 118 CheckFunc(fun.f) 119 120 if fun.values["c1"].Op != OpInvalid && fun.values["c2"].Op != OpInvalid { 121 t.Errorf("zsce should have removed c1 or c2") 122 } 123 if fun.values["sb1"].Op != OpInvalid && fun.values["sb2"].Op != OpInvalid { 124 t.Errorf("zsce should have removed sb1 or sb2") 125 } 126 } 127
