[RISCV] Add Predicates to fcanonicalize patterns. NFC (#158709)

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)>;
 }