cmd/compile/internal: add register info for loong64 regABI

Update #40724

Co-authored-by: Xiaolin Zhao <[email protected]>
Change-Id: Ifd7d94147b01e4fc83978b53dca2bcc0ad1ac4e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/521779
Reviewed-by: David Chase <[email protected]>
Run-TryBot: David Chase <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: David Chase <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
Reviewed-by: Meidan Li <[email protected]>

Author: 2 people

src/cmd/compile/internal/loong64/ssa.go

@@ -144,6 +144,8 @@ func ssaGenValue(s *ssagen.State, v *ssa.Value) {
 		p.From.Type = obj.TYPE_REG
 		p.From.Reg = r
 		ssagen.AddrAuto(&p.To, v)
+	case ssa.OpArgIntReg, ssa.OpArgFloatReg:
+		ssagen.CheckArgReg(v)
 	case ssa.OpLOONG64ADDV,
 		ssa.OpLOONG64SUBV,
 		ssa.OpLOONG64AND,

src/cmd/compile/internal/ssa/_gen/LOONG64Ops.go

@@ -476,8 +476,8 @@ func init() {
 		blocks:   blocks,
 		regnames: regNamesLOONG64,
 		// TODO: support register ABI on loong64
-		ParamIntRegNames:   "R4 R5 R6 R7 R8 R9 R10 R11",
-		ParamFloatRegNames: "F0 F1 F2 F3 F4 F5 F6 F7",
+		ParamIntRegNames:   "R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19",
+		ParamFloatRegNames: "F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15",
 		gpregmask:          gp,
 		fpregmask:          fp,
 		framepointerreg:    -1, // not used

src/cmd/compile/internal/ssa/config.go

@@ -283,6 +283,8 @@ func NewConfig(arch string, types Types, ctxt *obj.Link, optimize, softfloat boo
 		c.registers = registersLOONG64[:]
 		c.gpRegMask = gpRegMaskLOONG64
 		c.fpRegMask = fpRegMaskLOONG64
+		// c.intParamRegs = paramIntRegLOONG64
+		// c.floatParamRegs = paramFloatRegLOONG64
 		c.FPReg = framepointerRegLOONG64
 		c.LinkReg = linkRegLOONG64
 		c.hasGReg = true