[RISCV] Add Predicates to fcanonicalize patterns. NFC

This doesn't matter in practice since the only way fcanonicalize
can make it to isel is if the predicate is already true, but it's
good to be consistent.

Author: topperc

llvm/lib/Target/RISCV/RISCVInstrInfoD.td

@@ -401,6 +401,7 @@ foreach Ext = DExts in {
   defm : PatFprFpr_m<fmaximumnum, FMAX_D, Ext>;
   defm : PatFprFpr_m<riscv_fmin, FMIN_D, Ext>;
   defm : PatFprFpr_m<riscv_fmax, FMAX_D, Ext>;
+  let Predicates = Ext.Predicates in
   def : Pat<(f64 (fcanonicalize FPR64:$rs1)), (FMIN_D $rs1, $rs1)>;
 }
 

llvm/lib/Target/RISCV/RISCVInstrInfoF.td

@@ -655,6 +655,7 @@ foreach Ext = FExts in {
   defm : PatFprFpr_m<fmaximumnum, FMAX_S, Ext>;
   defm : PatFprFpr_m<riscv_fmin, FMIN_S, Ext>;
   defm : PatFprFpr_m<riscv_fmax, FMAX_S, Ext>;
+  let Predicates = Ext.Predicates in
   def : Pat<(f32 (fcanonicalize FPR32:$rs1)), (FMIN_S $rs1, $rs1)>;
 }
 

llvm/lib/Target/RISCV/RISCVInstrInfoZfh.td

@@ -380,6 +380,7 @@ foreach Ext = ZfhExts in {
   defm : PatFprFpr_m<fmaximumnum, FMAX_H, Ext>;
   defm : PatFprFpr_m<riscv_fmin, FMIN_H, Ext>;
   defm : PatFprFpr_m<riscv_fmax, FMAX_H, Ext>;
+  let Predicates = Ext.Predicates in
   def : Pat<(f16 (fcanonicalize FPR16:$rs1)), (FMIN_H $rs1, $rs1)>;
 }