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[dev.ssa] cmd/compile/internal/ssa: implement multiplies

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Use width-and-signed-specific multiply opcodes.
Implement OMUL.
A few other cleanups.

Fixes #11467

Change-Id: Ib0fe80a1a9b7208dbb8a2b6b652a478847f5d244
Reviewed-on: https://go-review.googlesource.com/12540
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Keith Randall 2015-07-22 13:46:15 -07:00
parent d5297f7261
commit be1eb57a8b
8 changed files with 487 additions and 50 deletions
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95
src/cmd/compile/internal/ssa/rewritegeneric.go
View file

@ -50,6 +50,29 @@ func rewriteValuegeneric(v *Value, config *Config) bool {
goto endfedc373d8be0243cb5dbbc948996fe3a
endfedc373d8be0243cb5dbbc948996fe3a:
;
case OpAddPtr:
// match: (AddPtr (Const [c]) (Const [d]))
// cond:
// result: (Const [c+d])
{
if v.Args[0].Op != OpConst {
goto end67284cb7ae441d6c763096b49a3569a3
}
c := v.Args[0].AuxInt
if v.Args[1].Op != OpConst {
goto end67284cb7ae441d6c763096b49a3569a3
}
d := v.Args[1].AuxInt
v.Op = OpConst
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AuxInt = c + d
return true
}
goto end67284cb7ae441d6c763096b49a3569a3
end67284cb7ae441d6c763096b49a3569a3:
;
case OpArrayIndex:
// match: (ArrayIndex (Load ptr mem) idx)
// cond:
@ -167,23 +190,19 @@ func rewriteValuegeneric(v *Value, config *Config) bool {
goto endce3ba169a57b8a9f6b12751d49b4e23a
endce3ba169a57b8a9f6b12751d49b4e23a:
;
case OpMul:
// match: (Mul <t> (Const [c]) (Const [d]))
// cond: is64BitInt(t)
case OpMul64:
// match: (Mul64 (Const [c]) (Const [d]))
// cond:
// result: (Const [c*d])
{
t := v.Type
if v.Args[0].Op != OpConst {
goto endd82095c6a872974522d33aaff1ee07be
goto endf4ba5346dc8a624781afaa68a8096a9a
}
c := v.Args[0].AuxInt
if v.Args[1].Op != OpConst {
goto endd82095c6a872974522d33aaff1ee07be
goto endf4ba5346dc8a624781afaa68a8096a9a
}
d := v.Args[1].AuxInt
if !(is64BitInt(t)) {
goto endd82095c6a872974522d33aaff1ee07be
}
v.Op = OpConst
v.AuxInt = 0
v.Aux = nil
@ -191,13 +210,59 @@ func rewriteValuegeneric(v *Value, config *Config) bool {
v.AuxInt = c * d
return true
}
goto endd82095c6a872974522d33aaff1ee07be
endd82095c6a872974522d33aaff1ee07be:
goto endf4ba5346dc8a624781afaa68a8096a9a
endf4ba5346dc8a624781afaa68a8096a9a:
;
case OpMul64U:
// match: (Mul64U (Const [c]) (Const [d]))
// cond:
// result: (Const [c*d])
{
if v.Args[0].Op != OpConst {
goto end88b6638d23b281a90172e80ab26549cb
}
c := v.Args[0].AuxInt
if v.Args[1].Op != OpConst {
goto end88b6638d23b281a90172e80ab26549cb
}
d := v.Args[1].AuxInt
v.Op = OpConst
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AuxInt = c * d
return true
}
goto end88b6638d23b281a90172e80ab26549cb
end88b6638d23b281a90172e80ab26549cb:
;
case OpMulPtr:
// match: (MulPtr (Const [c]) (Const [d]))
// cond:
// result: (Const [c*d])
{
if v.Args[0].Op != OpConst {
goto end10541de7ea2bce703c1e372ac9a271e7
}
c := v.Args[0].AuxInt
if v.Args[1].Op != OpConst {
goto end10541de7ea2bce703c1e372ac9a271e7
}
d := v.Args[1].AuxInt
v.Op = OpConst
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AuxInt = c * d
return true
}
goto end10541de7ea2bce703c1e372ac9a271e7
end10541de7ea2bce703c1e372ac9a271e7:
;
case OpPtrIndex:
// match: (PtrIndex <t> ptr idx)
// cond:
// result: (AddPtr ptr (Mul <config.Uintptr> idx (Const <config.Uintptr> [t.Elem().Size()])))
// result: (AddPtr ptr (MulPtr <config.Uintptr> idx (Const <config.Uintptr> [t.Elem().Size()])))
{
t := v.Type
ptr := v.Args[0]
@ -207,7 +272,7 @@ func rewriteValuegeneric(v *Value, config *Config) bool {
v.Aux = nil
v.resetArgs()
v.AddArg(ptr)
v0 := v.Block.NewValue0(v.Line, OpMul, TypeInvalid)
v0 := v.Block.NewValue0(v.Line, OpMulPtr, TypeInvalid)
v0.Type = config.Uintptr
v0.AddArg(idx)
v1 := v.Block.NewValue0(v.Line, OpConst, TypeInvalid)
@ -217,8 +282,8 @@ func rewriteValuegeneric(v *Value, config *Config) bool {
v.AddArg(v0)
return true
}
goto endc181347cd3c740e2a1da431a981fdd7e
endc181347cd3c740e2a1da431a981fdd7e:
goto endb39bbe157d1791123f6083b2cfc59ddc
endb39bbe157d1791123f6083b2cfc59ddc:
;
case OpSliceCap:
// match: (SliceCap (Load ptr mem))