Update to go1.24.0

src/cmd/internal/obj/arm64/obj7.go

@@ -850,8 +850,9 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) {
 				retReg = REGLINK
 			}
 			p.To = obj.Addr{}
+			aoffset := c.autosize
 			if c.cursym.Func().Text.Mark&LEAF != 0 {
-				if c.autosize != 0 {
+				if aoffset != 0 {
 					// Restore frame pointer.
 					// ADD $framesize-8, RSP, R29
 					p.As = AADD
@@ -871,8 +872,32 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) {
 					p.To.Reg = REGSP
 					p.Spadj = -c.autosize
 				}
+			} else if aoffset <= 0xF0 {
+				// small frame, restore LR and update SP in a single MOVD.P instruction.
+				// There is no correctness issue to use a single LDP for LR and FP,
+				// but the instructions are not pattern matched with the prologue's
+				// MOVD.W and MOVD, which may cause performance issue in
+				// store-forwarding.
+
+				// MOVD -8(RSP), R29
+				p.As = AMOVD
+				p.From.Type = obj.TYPE_MEM
+				p.From.Reg = REGSP
+				p.From.Offset = -8
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = REGFP
+				p = obj.Appendp(p, c.newprog)
+
+				// MOVD.P offset(RSP), R30
+				p.As = AMOVD
+				p.From.Type = obj.TYPE_MEM
+				p.Scond = C_XPOST
+				p.From.Offset = int64(aoffset)
+				p.From.Reg = REGSP
+				p.To.Type = obj.TYPE_REG
+				p.To.Reg = REGLINK
+				p.Spadj = -aoffset
 			} else {
-				aoffset := c.autosize
 				// LDP -8(RSP), (R29, R30)
 				p.As = ALDP
 				p.From.Type = obj.TYPE_MEM