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[dev.ssa] cmd/compile: port SSA backend to amd64p32

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It's not a new backend, just a PtrSize==4 modification
of the existing AMD64 backend.

Change-Id: Icc63521a5cf4ebb379f7430ef3f070894c09afda
Reviewed-on: https://go-review.googlesource.com/25586
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2016-08-08 11:26:25 -07:00
parent f3b4e78516
commit 69a755b602
15 changed files with 994 additions and 63 deletions
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10
src/cmd/compile/internal/ssa/regalloc.go
View file

@ -492,8 +492,14 @@ func (s *regAllocState) init(f *Func) {
s.f.Config.fe.Unimplementedf(0, "arch %s not implemented", s.f.Config.arch)
}
}
if s.f.Config.nacl && s.f.Config.arch == "arm" {
s.allocatable &^= 1 << 9 // R9 is "thread pointer" on nacl/arm
if s.f.Config.nacl {
switch s.f.Config.arch {
case "arm":
s.allocatable &^= 1 << 9 // R9 is "thread pointer" on nacl/arm
case "amd64p32":
s.allocatable &^= 1 << 5 // BP - reserved for nacl
s.allocatable &^= 1 << 15 // R15 - reserved for nacl
}
}
s.regs = make([]regState, s.numRegs)