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cmd/compile/internal/amd64: add SETccmem

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Combine setcc and store of result into setcc that writes directly to memory.
Triggers 200+ times in go tool.

Fixes #21630

Change-Id: Iafa22607426f4120140c88fae4b9aecb46e0bba8
Reviewed-on: https://go-review.googlesource.com/67950
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Ilya Tocar 2017-10-03 14:12:00 -05:00
parent 91121ff704
commit 6b8a3c8889
6 changed files with 1324 additions and 2 deletions
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11
src/cmd/compile/internal/amd64/ssa.go
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@ -841,6 +841,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.From.Reg = v.Args[0].Reg()
p.To.Type = obj.TYPE_REG
p.To.Reg = v.Reg()
case ssa.OpAMD64SETEQ, ssa.OpAMD64SETNE,
ssa.OpAMD64SETL, ssa.OpAMD64SETLE,
ssa.OpAMD64SETG, ssa.OpAMD64SETGE,
@ -852,6 +853,16 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.To.Type = obj.TYPE_REG
p.To.Reg = v.Reg()
case ssa.OpAMD64SETEQmem, ssa.OpAMD64SETNEmem,
ssa.OpAMD64SETLmem, ssa.OpAMD64SETLEmem,
ssa.OpAMD64SETGmem, ssa.OpAMD64SETGEmem,
ssa.OpAMD64SETBmem, ssa.OpAMD64SETBEmem,
ssa.OpAMD64SETAmem, ssa.OpAMD64SETAEmem:
p := s.Prog(v.Op.Asm())
p.To.Type = obj.TYPE_MEM
p.To.Reg = v.Args[0].Reg()
gc.AddAux(&p.To, v)
case ssa.OpAMD64SETNEF:
p := s.Prog(v.Op.Asm())
p.To.Type = obj.TYPE_REG

8
src/cmd/compile/internal/gc/asm_test.go
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@ -1120,6 +1120,14 @@ var linuxAMD64Tests = []*asmTest{
`,
pos: []string{"\tMOVL\t[^X].*, X.*"},
},
{
fn: `
func $(x uint32) bool {
return x > 4
}
`,
pos: []string{"\tSETHI\t\\("},
},
}
var linux386Tests = []*asmTest{

33
src/cmd/compile/internal/ssa/gen/AMD64.rules
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@ -486,6 +486,17 @@
(Addr {sym} base) && config.PtrSize == 8 -> (LEAQ {sym} base)
(Addr {sym} base) && config.PtrSize == 4 -> (LEAL {sym} base)
(MOVBstore [off] {sym} ptr y:(SETL x) mem) && y.Uses == 1 -> (SETLmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETLE x) mem) && y.Uses == 1 -> (SETLEmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETG x) mem) && y.Uses == 1 -> (SETGmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETGE x) mem) && y.Uses == 1 -> (SETGEmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETEQ x) mem) && y.Uses == 1 -> (SETEQmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETNE x) mem) && y.Uses == 1 -> (SETNEmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETB x) mem) && y.Uses == 1 -> (SETBmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETBE x) mem) && y.Uses == 1 -> (SETBEmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETA x) mem) && y.Uses == 1 -> (SETAmem [off] {sym} ptr x mem)
(MOVBstore [off] {sym} ptr y:(SETAE x) mem) && y.Uses == 1 -> (SETAEmem [off] {sym} ptr x mem)
// block rewrites
(If (SETL cmp) yes no) -> (LT cmp yes no)
(If (SETLE cmp) yes no) -> (LE cmp yes no)
@ -580,6 +591,17 @@
(SETEQ (TESTQconst [c] x)) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETAE (BTQconst [log2(c)] x))
(SETNE (TESTQ (MOVQconst [c]) x)) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETB (BTQconst [log2(c)] x))
(SETEQ (TESTQ (MOVQconst [c]) x)) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETAE (BTQconst [log2(c)] x))
// SET..mem variant
(SETNEmem [off] {sym} ptr (TESTL (SHLL (MOVLconst [1]) x) y) mem) && !config.nacl -> (SETBmem [off] {sym} ptr (BTL x y) mem)
(SETEQmem [off] {sym} ptr (TESTL (SHLL (MOVLconst [1]) x) y) mem) && !config.nacl -> (SETAEmem [off] {sym} ptr (BTL x y) mem)
(SETNEmem [off] {sym} ptr (TESTQ (SHLQ (MOVQconst [1]) x) y) mem) && !config.nacl -> (SETBmem [off] {sym} ptr (BTQ x y) mem)
(SETEQmem [off] {sym} ptr (TESTQ (SHLQ (MOVQconst [1]) x) y) mem) && !config.nacl -> (SETAEmem [off] {sym} ptr (BTQ x y) mem)
(SETNEmem [off] {sym} ptr (TESTLconst [c] x) mem) && isPowerOfTwo(c) && log2(c) < 32 && !config.nacl -> (SETBmem [off] {sym} ptr (BTLconst [log2(c)] x) mem)
(SETEQmem [off] {sym} ptr (TESTLconst [c] x) mem) && isPowerOfTwo(c) && log2(c) < 32 && !config.nacl -> (SETAEmem [off] {sym} ptr (BTLconst [log2(c)] x) mem)
(SETNEmem [off] {sym} ptr (TESTQconst [c] x) mem) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETBmem [off] {sym} ptr (BTQconst [log2(c)] x) mem)
(SETEQmem [off] {sym} ptr (TESTQconst [c] x) mem) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETAEmem [off] {sym} ptr (BTQconst [log2(c)] x) mem)
(SETNEmem [off] {sym} ptr (TESTQ (MOVQconst [c]) x) mem) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETBmem [off] {sym} ptr (BTQconst [log2(c)] x) mem)
(SETEQmem [off] {sym} ptr (TESTQ (MOVQconst [c]) x) mem) && isPowerOfTwo(c) && log2(c) < 64 && !config.nacl -> (SETAEmem [off] {sym} ptr (BTQconst [log2(c)] x) mem)
// Fold boolean negation into SETcc.
(XORLconst [1] (SETNE x)) -> (SETEQ x)
@ -969,6 +991,17 @@
(SETEQ (InvertFlags x)) -> (SETEQ x)
(SETNE (InvertFlags x)) -> (SETNE x)
(SETLmem [off] {sym} ptr (InvertFlags x) mem) -> (SETGmem [off] {sym} ptr x mem)
(SETGmem [off] {sym} ptr (InvertFlags x) mem) -> (SETLmem [off] {sym} ptr x mem)
(SETBmem [off] {sym} ptr (InvertFlags x) mem) -> (SETAmem [off] {sym} ptr x mem)
(SETAmem [off] {sym} ptr (InvertFlags x) mem) -> (SETBmem [off] {sym} ptr x mem)
(SETLEmem [off] {sym} ptr (InvertFlags x) mem) -> (SETGEmem [off] {sym} ptr x mem)
(SETGEmem [off] {sym} ptr (InvertFlags x) mem) -> (SETLEmem [off] {sym} ptr x mem)
(SETBEmem [off] {sym} ptr (InvertFlags x) mem) -> (SETAEmem [off] {sym} ptr x mem)
(SETAEmem [off] {sym} ptr (InvertFlags x) mem) -> (SETBEmem [off] {sym} ptr x mem)
(SETEQmem [off] {sym} ptr (InvertFlags x) mem) -> (SETEQmem [off] {sym} ptr x mem)
(SETNEmem [off] {sym} ptr (InvertFlags x) mem) -> (SETNEmem [off] {sym} ptr x mem)
// sign extended loads
// Note: The combined instruction must end up in the same block
// as the original load. If not, we end up making a value with

11
src/cmd/compile/internal/ssa/gen/AMD64Ops.go
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@ -355,6 +355,17 @@ func init() {
{name: "SETBE", argLength: 1, reg: readflags, asm: "SETLS"}, // extract unsigned <= condition from arg0
{name: "SETA", argLength: 1, reg: readflags, asm: "SETHI"}, // extract unsigned > condition from arg0
{name: "SETAE", argLength: 1, reg: readflags, asm: "SETCC"}, // extract unsigned >= condition from arg0
// Variants that store result to memory
{name: "SETEQmem", argLength: 3, reg: gpstoreconst, asm: "SETEQ", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract == condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETNEmem", argLength: 3, reg: gpstoreconst, asm: "SETNE", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract != condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETLmem", argLength: 3, reg: gpstoreconst, asm: "SETLT", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract signed < condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETLEmem", argLength: 3, reg: gpstoreconst, asm: "SETLE", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract signed <= condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETGmem", argLength: 3, reg: gpstoreconst, asm: "SETGT", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract signed > condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETGEmem", argLength: 3, reg: gpstoreconst, asm: "SETGE", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract signed >= condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETBmem", argLength: 3, reg: gpstoreconst, asm: "SETCS", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract unsigned < condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETBEmem", argLength: 3, reg: gpstoreconst, asm: "SETLS", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract unsigned <= condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETAmem", argLength: 3, reg: gpstoreconst, asm: "SETHI", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract unsigned > condition from arg1 to arg0+auxint+aux, arg2=mem
{name: "SETAEmem", argLength: 3, reg: gpstoreconst, asm: "SETCC", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract unsigned >= condition from arg1 to arg0+auxint+aux, arg2=mem
// Need different opcodes for floating point conditions because
// any comparison involving a NaN is always FALSE and thus
// the patterns for inverting conditions cannot be used.

140
src/cmd/compile/internal/ssa/opGen.go
View File

@ -568,6 +568,16 @@ const (
OpAMD64SETBE
OpAMD64SETA
OpAMD64SETAE
OpAMD64SETEQmem
OpAMD64SETNEmem
OpAMD64SETLmem
OpAMD64SETLEmem
OpAMD64SETGmem
OpAMD64SETGEmem
OpAMD64SETBmem
OpAMD64SETBEmem
OpAMD64SETAmem
OpAMD64SETAEmem
OpAMD64SETEQF
OpAMD64SETNEF
OpAMD64SETORD
@ -6761,6 +6771,136 @@ var opcodeTable = [...]opInfo{
},
},
},
{
name: "SETEQmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETEQ,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETNEmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETNE,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETLmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETLT,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETLEmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETLE,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETGmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETGT,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETGEmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETGE,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETBmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETCS,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETBEmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETLS,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETAmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETHI,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETAEmem",
auxType: auxSymOff,
argLen: 3,
faultOnNilArg0: true,
symEffect: SymWrite,
asm: x86.ASETCC,
reg: regInfo{
inputs: []inputInfo{
{0, 4295032831}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 SB
},
},
},
{
name: "SETEQF",
argLen: 1,

1123
src/cmd/compile/internal/ssa/rewriteAMD64.go
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