fixup! Add aliases.

Author: topperc

llvm/lib/Target/RISCV/RISCVInstrInfoXSf.td

@@ -818,6 +818,7 @@ let Predicates = [HasVendorXSiFivecdiscarddlone] in {
     let rd = 0;
     let rs2 = 0b00010;
   }
+  def : InstAlias<"sf.cdiscard.d.l1", (SF_CDISCARD_D_L1 X0)>;
 } // Predicates = [HasVendorXSifivecdiscarddlone]
 
 let Predicates = [HasVendorXSiFivecflushdlone] in {
@@ -829,4 +830,5 @@ let Predicates = [HasVendorXSiFivecflushdlone] in {
     let rd = 0;
     let rs2 = 0b00000;
   }
+  def : InstAlias<"sf.cflush.d.l1", (SF_CFLUSH_D_L1 X0)>;
 } // Predicates = [HasVendorXSifivecflushdlone]

llvm/test/MC/RISCV/xsifive-valid.s

@@ -12,6 +12,9 @@
 # CHECK-INST: sf.cflush.d.l1     zero
 # CHECK-ENC: encoding: [0x73,0x00,0x00,0xfc]
 sf.cflush.d.l1 x0
+# CHECK-INST: sf.cflush.d.l1
+# CHECK-ENC: encoding: [0x73,0x00,0x00,0xfc]
+sf.cflush.d.l1
 
 # CHECK-INST: sf.cflush.d.l1     t2
 # CHECK-ENC: encoding: [0x73,0x80,0x03,0xfc]
@@ -20,6 +23,9 @@ sf.cflush.d.l1 x7
 # CHECK-INST: sf.cdiscard.d.l1   zero
 # CHECK-ENC: encoding: [0x73,0x00,0x20,0xfc]
 sf.cdiscard.d.l1 x0
+# CHECK-INST: sf.cdiscard.d.l1
+# CHECK-ENC: encoding: [0x73,0x00,0x20,0xfc]
+sf.cdiscard.d.l1
 
 # CHECK-INST: sf.cdiscard.d.l1   t2
 # CHECK-ENC: encoding: [0x73,0x80,0x23,0xfc]