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cmd/compile: add new ops for experiment with late call expansion

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Added Dereference, StaticLECall, SelectN, SelectNAddr

Change-Id: I5426ae488e83956539aa07f7415b8acc26c933e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/239082
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
David Chase 2020-06-15 14:20:36 -04:00
parent f554eb7bc3
commit 35e413c537
2 changed files with 38 additions and 5 deletions
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15
src/cmd/compile/internal/ssa/gen/genericOps.go
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@ -346,6 +346,7 @@ var genericOps = []opData{
// Memory operations
{name: "Load", argLength: 2}, // Load from arg0. arg1=memory
{name: "Dereference", argLength: 2}, // Load from arg0. arg1=memory. Helper op for arg/result passing, result is an otherwise not-SSA-able "value".
{name: "Store", argLength: 3, typ: "Mem", aux: "Typ"}, // Store arg1 to arg0. arg2=memory, aux=type. Returns memory.
// The source and destination of Move may overlap in some cases. See e.g.
// memmove inlining in generic.rules. When inlineablememmovesize (in ../rewrite.go)
@ -387,9 +388,11 @@ var genericOps = []opData{
// as a phantom first argument.
// TODO(josharian): ClosureCall and InterCall should have Int32 aux
// to match StaticCall's 32 bit arg size limit.
{name: "ClosureCall", argLength: 3, aux: "CallOff", call: true}, // arg0=code pointer, arg1=context ptr, arg2=memory. auxint=arg size. Returns memory.
{name: "StaticCall", argLength: 1, aux: "CallOff", call: true}, // call function aux.(*obj.LSym), arg0=memory. auxint=arg size. Returns memory.
{name: "InterCall", argLength: 2, aux: "CallOff", call: true}, // interface call. arg0=code pointer, arg1=memory, auxint=arg size. Returns memory.
// TODO(drchase,josharian): could the arg size limit be bundled into the rules for CallOff?
{name: "ClosureCall", argLength: 3, aux: "CallOff", call: true}, // arg0=code pointer, arg1=context ptr, arg2=memory. auxint=arg size. Returns memory.
{name: "StaticCall", argLength: 1, aux: "CallOff", call: true}, // call function aux.(*obj.LSym), arg0=memory. auxint=arg size. Returns memory.
{name: "InterCall", argLength: 2, aux: "CallOff", call: true}, // interface call. arg0=code pointer, arg1=memory, auxint=arg size. Returns memory.
{name: "StaticLECall", argLength: -1, aux: "CallOff", call: true}, // late-expanded static call function aux.(*ssa.AuxCall.Fn). arg0..argN-1 are inputs, argN is mem. auxint = arg size. Result is tuple of result(s), plus mem.
// Conversions: signed extensions, zero (unsigned) extensions, truncations
{name: "SignExt8to16", argLength: 1, typ: "Int16"},
@ -531,8 +534,10 @@ var genericOps = []opData{
{name: "Cvt64Fto64U", argLength: 1}, // float64 -> uint64, only used on archs that has the instruction
// pseudo-ops for breaking Tuple
{name: "Select0", argLength: 1, zeroWidth: true}, // the first component of a tuple
{name: "Select1", argLength: 1, zeroWidth: true}, // the second component of a tuple
{name: "Select0", argLength: 1, zeroWidth: true}, // the first component of a tuple
{name: "Select1", argLength: 1, zeroWidth: true}, // the second component of a tuple
{name: "SelectN", argLength: 1, aux: "Int64"}, // arg0=tuple, auxint=field index. Returns the auxint'th member.
{name: "SelectNAddr", argLength: 1, aux: "Int64"}, // arg0=tuple, auxint=field index. Returns the address of auxint'th member. Used for un-SSA-able result types.
// Atomic operations used for semantically inlining runtime/internal/atomic.
// Atomic loads return a new memory so that the loads are properly ordered