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[dev.ssa] cmd/compile/internal/gc: handle all inputs for shifts.

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Disable CX as output for shift operations.

Change-Id: I85e6b22d09009b38847082dc375b6108c2dee80a
Reviewed-on: https://go-review.googlesource.com/13370
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Alexandru Moșoi 2015-08-07 12:19:03 +02:00 committed by Keith Randall
parent 35fb514596
commit c55870a541
3 changed files with 37 additions and 13 deletions
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23
src/cmd/compile/internal/gc/testdata/arith_ssa.go vendored
View File

@ -141,6 +141,28 @@ func testBitwiseRshU_ssa(a uint32, b, c uint32) uint32 {
return a >> b >> c
}
func testShiftCX_ssa() int {
switch {
} // prevent inlining
v1 := uint8(3)
v4 := (v1 * v1) ^ v1 | v1 - v1 - v1&v1 ^ uint8(3+2) + v1*1>>0 - v1 | 1 | v1<<(2*3|0-0*0^1)
v5 := v4>>(3-0-uint(3)) | v1 | v1 + v1 ^ v4<<(0+1|3&1)<<(uint64(1)<<0*2*0<<0) ^ v1
v6 := v5 ^ (v1+v1)*v1 | v1 | v1*v1>>(v1&v1)>>(uint(1)<<0*uint(3)>>1)*v1<<2*v1<<v1 - v1>>2 | (v4 - v1) ^ v1 + v1 ^ v1>>1 | v1 + v1 - v1 ^ v1
v7 := v6 & v5 << 0
v1++
v11 := 2&1 ^ 0 + 3 | int(0^0)<<1>>(1*0*3) ^ 0*0 ^ 3&0*3&3 ^ 3*3 ^ 1 ^ int(2)<<(2*3) + 2 | 2 | 2 ^ 2 + 1 | 3 | 0 ^ int(1)>>1 ^ 2 // int
v7--
return int(uint64(2*1)<<(3-2)<<uint(3>>v7)-2)&v11 | v11 - int(2)<<0>>(2-1)*(v11*0&v11<<1<<(uint8(2)+v4))
}
func testShiftCX() {
want := 141
if got := testShiftCX_ssa(); want != got {
println("testShiftCX failed, wanted", want, "got", got)
failed = true
}
}
// testSubqToNegq ensures that the SUBQ -> NEGQ translation works correctly.
func testSubqToNegq() {
want := int64(-318294940372190156)
@ -263,6 +285,7 @@ func main() {
testBitwiseLogic()
testOcom()
testLrot()
testShiftCX()
testSubConst()
if failed {

3
src/cmd/compile/internal/ssa/gen/AMD64Ops.go
View File

@ -72,6 +72,7 @@ func init() {
// Common individual register masks
var (
cx = buildReg("CX")
gp = buildReg("AX CX DX BX BP SI DI R8 R9 R10 R11 R12 R13 R14 R15")
gpsp = gp | buildReg("SP")
gpspsb = gpsp | buildReg("SB")
@ -91,7 +92,7 @@ func init() {
gp11sb = regInfo{inputs: []regMask{gpspsb}, outputs: gponly}
gp21 = regInfo{inputs: []regMask{gpsp, gpsp}, outputs: gponly}
gp21sb = regInfo{inputs: []regMask{gpspsb, gpsp}, outputs: gponly}
gp21shift = regInfo{inputs: []regMask{gpsp, buildReg("CX")}, outputs: gponly}
gp21shift = regInfo{inputs: []regMask{gpsp, cx}, outputs: []regMask{gp &^ cx}}
gp2flags = regInfo{inputs: []regMask{gpsp, gpsp}, outputs: flagsonly}
gp1flags = regInfo{inputs: []regMask{gpsp}, outputs: flagsonly}

24
src/cmd/compile/internal/ssa/opGen.go
View File

@ -1175,7 +1175,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1188,7 +1188,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1201,7 +1201,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1214,7 +1214,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1275,7 +1275,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1288,7 +1288,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1301,7 +1301,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1314,7 +1314,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1375,7 +1375,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1388,7 +1388,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1401,7 +1401,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},
@ -1414,7 +1414,7 @@ var opcodeTable = [...]opInfo{
2, // .CX
},
outputs: []regMask{
65519, // .AX .CX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
65517, // .AX .DX .BX .BP .SI .DI .R8 .R9 .R10 .R11 .R12 .R13 .R14 .R15
},
},
},