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cmd/compile: teach regalloc to rightly do nothing on loong64 in case of dynlinking

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This is needed before actual support for buildmode=plugin is added.
Should not affect current behavior.

Change-Id: I86371d7e373fd529cb8710850d7b0fbbf1eb52ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/480877
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: WANG Xuerui <git@xen0n.name>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
WANG Xuerui 2022-12-13 16:51:02 +08:00 committed by David Chase
parent 346e06c46d
commit 08b9640333
1 changed files with 2 additions and 0 deletions
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2
src/cmd/compile/internal/ssa/regalloc.go
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@ -672,6 +672,8 @@ func (s *regAllocState) init(f *Func) {
s.allocatable &^= 1 << 9 // R9
case "arm64":
// nothing to do
case "loong64": // R2 (aka TP) already reserved.
// nothing to do
case "ppc64le": // R2 already reserved.
// nothing to do
case "riscv64": // X3 (aka GP) and X4 (aka TP) already reserved.